Talos also discovered three vulnerabilities in Veertu’s Anka Build, a suite of software designed to test macOS or iOS applications in CI/CD environments.

Wednesday, October 9, 2024 12:00

Cisco Talos’ Vulnerability Research team recently disclosed six new security vulnerabilities across a range of software, including one in a popular PDF reader that could lead to arbitrary code execution. 

Foxit PDF Reader, one of the most popular alternatives to Adobe Acrobat, contains a memory corruption vulnerability that could allow an adversary to execute code on the targeted machine. 

Talos also discovered three vulnerabilities in Veertu’s Anka Build, a suite of software designed to test macOS or iOS applications in CI/CD environments.

For Snort coverage that can detect the exploitation of these vulnerabilities, download the latest rule sets from Snort.org, and our latest Vulnerability Advisories are always posted on Talos Intelligence’s website.

**Use-after-free vulnerability in Foxit PDF Reader**

_Discovered by KPC._

A use-after-free vulnerability in Foxit PDF Reader could lead to memory corruption and eventually arbitrary code execution on the targeted machine.

TALOS-2024-1967 (CVE-2024-28888) can be triggered if an adversary tricks a user into opening a specially crafted PDF that contains malicious JavaScript. Exploitation could also occur if the targeted user visits an attacker-controlled website with the Foxit PDF Reader browser extension enabled.

**Multiple vulnerabilities in GNOME project library could lead to code execution**

Two vulnerabilities in the G Structured File Library (libgsf) could lead to arbitrary code execution. 

This GNOME project supports an abstraction layer around different structure file formats such as .tar and .zip. 

TALOS-2024-2068 (CVE-2024-36474) is an integer overflow vulnerability that could allow an out-of-bounds index to be used when reading and writing to an array. This could lead to arbitrary code execution if an adversary exploited it appropriately. 

TALOS-2024-2069 (CVE-2024-42415) works similarly, but in this case, it arises when the software processes the sector allocation table.

An adversary could exploit both these vulnerabilities by tricking the targeted user into opening a malicious, specially crafted file. 

**Three vulnerabilities in Veertu Anka Build**

_Discovered by KPC._

Veertu’s Anka Build software contains three vulnerabilities, two of which are directory traversal issues. 

Anka Build is a suite of software designed to test macOS and iOS applications in CI/CD environments. The suite is a centralized dashboard for managing nodes, VM instances, templates, tags and logs. 

This software contains two directory traversal vulnerabilities — TALOS-2024-2059 (CVE-2024-41163) and TALOS-2024-2061 (CVE-2024-41922) — that could lead to the disclosure of arbitrary files. An adversary could exploit these vulnerabilities by sending the target a specially crafted HTTP request. 

Another vulnerability, TALOS-2024-2060 (CVE-2024-39755), is a privilege escalation issue that could allow a low-privileged user to force the software to update, potentially raising their access to that of a root user.

Vulnerability in popular PDF reader could lead to arbitrary code execution; Multiple issues in GNOME project

The two vulnerabilities that Microsoft reports have been actively exploited in the wild and are publicly known are both rated as only being of “moderate” severity.

Tuesday, October 8, 2024 15:04

The largest Microsoft Patch Tuesday since July includes two vulnerabilities that have been exploited in the wild and three other critical issues across the company’s range of hardware and software offerings.  

October’s monthly security update from Microsoft includes fixes for 117 CVEs, the most in a month since July’s updates covered 142 vulnerabilities.   

The two vulnerabilities that Microsoft reports have been actively exploited in the wild and are publicly known are both rated as only being of “moderate” severity.  

CVE-2024-43572 is a remote code execution vulnerability in the Microsoft Management Console that could allow an attacker to execute arbitrary code on the targeted machine. Microsoft’s security update will prevent untrusted Microsoft Saved Console (MSC) files from being opened to protect users against adversaries trying to exploit this vulnerability.  

The security update will prevent untrusted Microsoft Saved Console (MSC) files from being opened to protect customers against the risks associated with this vulnerability. 

The other vulnerability that was exploited in the wild in this week’s security update is CVE-2024-43573, a platform spoofing vulnerability in Windows MSHTML. Platform spoofing vulnerabilities usually allow an adversary to gain unauthorized access to an environment by disguising themselves as a trusted source.  

CVE-2024-43583, an elevation of privilege vulnerability in Winlogon, has also been publicly disclosed, according to Microsoft, but has not yet been exploited in the wild. This vulnerability could allow an attacker to obtain SYSTEM-level privilege. In addition to applying the patch, Microsoft also recommends users enable a Microsoft first-party Input Method Editor (IME) on their devices to prevent adversaries from being able to exploit third-party IMEs during the sign-in process. 

October’s Patch Tuesday also includes three critical vulnerabilities that could all lead to remote code execution. 

CVE-2024-43468 is the most serious of this bunch, with a CVSS severity score of 9.8 out of 10. An attacker could exploit this vulnerability in Microsoft Configuration Manager to execute commands on the targeted server or underlying database. 

Another remote code execution vulnerability, CVE-2024-43488, exists in the Visual Studio Code extension for Arduino, an open-source platform for building and managing single-board microcontrollers and microcontroller kits. A missing authentication protocol could allow an adversary to execute remote code over the network.  

Microsoft stated that the company has already mitigated this vulnerability and users do not need to take any additional steps. This extension has also been deprecated and can no longer be downloaded from the internet. 

Lastly, CVE-2024-43582 exists in the Windows Remote Desktop Protocol server and could allow an attacker to execute code on the server side with the same permissions as the RPC service. An adversary could exploit this vulnerability by sending malformed packets to an RPC host. However, exploitation also requires that the adversary win a race condition first.  

Cisco Talos would also like to highlight several vulnerabilities that are only rated as “important,” but Microsoft lists as “more likely” to be exploited: 

*   CVE-2024-43502: Elevation of privilege vulnerability in Windows Kernel 
*   CVE-2024-43509 and CVE-2024-43556: Elevation of privilege vulnerabilities in Windows Graphics Component     
*   CVE-2024-43560: Elevation of privilege vulnerability in Windows Storage Port 
*   CVE-2024-43581 and CVE-2024-43615: Remote code execution vulnerability in Microsoft OpenSSH for Windows  
*   CVE-2024-43609: Spoofing vulnerability in Microsoft Office 

A complete list of all the other vulnerabilities Microsoft disclosed this month is available on its update page. 

In response to these vulnerability disclosures, Talos is releasing a new Snort rule set that detects attempts to exploit some of them. Please note that additional rules may be released at a future date and current rules are subject to change pending additional information. Cisco Security Firewall customers should use the latest update to their ruleset by updating their SRU. Open-source Snort Subscriber Rule Set customers can stay up to date by downloading the latest rule pack available for purchase on Snort.org.  

The rules included in this release that protect against the exploitation of many of these vulnerabilities are 64083 - 64086, 64089, 64090, 64111 and 64112. There are also Snort 3 rules 301034 - 301036 and 301041.

Largest Patch Tuesday since July includes two exploited in the wild, three critical vulnerabilities

Despite what lessons we thought we learned from Colonial Pipeline, none of those lessons have been able to be put into practice.

Thursday, October 3, 2024 14:00

Government-run water systems and other critical infrastructure are still at risk from state-sponsored actors, according to a renewed warning from the U.S. Cybersecurity and Infrastructure Security Agency.  

CISA released an advisory last week on the matter of days after a small water treatment facility in Kansas was forced into manual operations after a cyber attack.  

I feel like this is just the latest in a string of warnings that we’ve been talking about since the Colonial Pipeline attack in 2021 that forced a gasoline shortage across the Eastern U.S. We’ve been discussing the importance of defending critical infrastructure for years now, so what’s new now? 

For starters, it seems like the frequency of these attacks seems to be on the rise. And many efforts to regulate cybersecurity policies and procedures in the industry have thus far fallen flat. 

The White House is reportedly working on rolling out a second wave of cybersecurity recommendations for water treatment facilities on the back of the attack in Kansas that affected the public water supply of 11,000 people. Although the cyber attack did not actually affect anyone from getting their water, it does raise the question of how much of an issue this could be if a state-sponsored actor were to target a facility in a town with a larger population, or if there weren’t backup plans in place to operate the facility manually.  

The U.S. Environmental Protection Agency (EPA) said last year that it had to pull a memo outlining cybersecurity standards at water treatment plants because of constant legal action from state and federal lawmakers and private water companies. And the American Water Works Association (a non-profit lobbying organization representing more than 50,000 members) has advocated for facilities and groups like the AWWA to write their own cybersecurity policies rather than relying on the U.S. government.  

All of that is to say, despite what lessons we thought we learned from Colonial Pipeline, none of those lessons have been able to be put into practice, and we’re still where we were with cybersecurity policies and regulations three years ago.  

Despite urging from the industry and some lawmakers, I’ve yet to see these groups write any of their own policies, so even if they have that power, they don’t seem to be taking advantage of it. So when CISA puts out this type of alert again in a few months after whatever future incident lies ahead, I would expect to see more action from all parties involved rather than another round of words warning that attacks can, and will, happen. 

**The one big thing **

Talos has recently observed an attack leading to the deployment of a MedusaLocker ransomware variant known as “BabyLockerKZ.” This actor has been active since at least late 2022 and targets organizations worldwide, although the number of victims was higher than average in EU countries until mid-2023 and, since then, in South American countries. We assess with medium confidence that the actor is financially motivated, likely working as an IAB or an affiliate of a ransomware cartel. 

**Why do I care? **

The actor behind these attacks seems to be particularly active, infecting more than 100 organizations per month, according to Talos telemetry. This reveals the professional and highly aggressive nature of the attacks and is coherent with the activity we would expect from an IAB or ransomware affiliate. As with any ransomware, BabyLockerKZ looks to encrypt targets’ files and lock them down until the target pays the request ransom.  

**So now what? **

Talos has released several new Snort rules and ClamAV signatures that detect the activity of this group and BabyLockerKZ. This group is also known to use several publicly available tools in their attacks, such as Mimikatz, which are well-known to the security community at this point. For more on living-off-the-land binaries (LoLBins) that attackers like this one are increasingly using, read our blog post here.  

**Top security headlines of the week **

**International law enforcement agencies worked together to arrest and unmask four individuals believed to be associated with the LockBit ransomware group.** As part of this campaign, investigators have also linked one of the LockBit members to Evil Corp, a Russian-backed cybercrime gang. At a press conference announcing the arrests, representatives from the U.K.’s National Crime Agency said that Evil Corp maintained a “privileged” relationship with the Russian government and was often asked to carry out targeted cyber attacks against NATO countries. LockBit is traditionally associated with financially motivated ransomware attacks targeting private companies, regardless of the country in which they reside. Europol, the U.K. NCA, the U.S. FBI and Japan’s National Police have also worked together to create and release a decryptor that can unlock files affected by the LockBit ransomware. The same agencies have been working since last year to target and seize assets and servers belonging to LockBit. The threat actor has taken credit for several major attacks over the past several years, including those targeting Boeing, Volkswagen, multiple major international ports and government-owned computers in Fulton County, Georgia. (Europol, TechCrunch) 

**The latest version of the U.S.’s National Institute of Standards and Technology’s password recommendations drop complexity in favor of length.** NIST’s latest version of its Password Guidelines removes the recommendations that passwords use a mixture of character types and that they be changed often. Instead, the draft states that credential service providers (CSPs) recommend users create passwords between 15 and 64 characters that may include ASCII or Unicode characters. The previous version of the NIST standards led many users to adopt easy-to-guess passwords such as “Password1234!” or store the complicated passwords in easy-to-access places, such as written down on a piece of paper near their computer. CSPs are also instructed to drop knowledge-based authentication or security questions when selecting passwords. NIST standards are important because they formalize principles widely adopted by the U.S. government and major technology companies like Microsoft and Google. The latest draft also states that users only need to change their passwords in the event of a publicly reported data breach. (Infosecurity Magazine, Dark Reading) 

**A vulnerability in a web app from car manufacturer Kia could allow an attacker to view a car’s license plate, unlock the doors, and even remotely start the ignition.** The since-patched vulnerability in Kia’s web portal could allow attackers to essentially build and deploy their own web app and reassign control of the internet-connected features of most modern Kia vehicles. The vulnerability could have allowed an adversary to immediately ping the location of a targeted vehicle, process its license plate number, and even honk the horn. This is the second such vulnerability the group of researchers has disclosed to a Hyundai-owned company in the past two years. The vulnerability highlights the risk that modern vehicles come with, many of which rely on internet connectivity for some of their features or interface with web apps, websites or mobile phone apps. A proof of concept from the researchers included a dashboard that could allow an attacker to type in a license plate number and then retrieve the owner’s personal information, eventually adding themselves as an “owner” of the car and executing commands on the vehicle. (Wired, Security Week) 

**Can’t get enough Talos? **

*   Resurgence of Spam: Cisco Talos Sound Alarm on New Tactics 
*   Critical RCE vulnerability found in OpenPLC 
*   Simple Mail Transfer Pirates: How threat actors are abusing third-party infrastructure to send spam 

**Upcoming events where you can find Talos**

**MITRE ATT&CKcon 5.0** **(Oct. 22 - 23)** 

_McLean, Virginia and Virtual_

Nicole Hoffman and James Nutland will provide a brief history of Akira ransomware and an overview of the Linux ransomware landscape. Then, morph into action as they take a technical deep dive into the latest Linux variant using the ATT&CK framework to uncover its techniques, tactics and procedures.

**it-sa Expo & Congress** **(Oct. 22 - 24)** 

_Nuremberg, Germany_

**White Hat Desert Con** **(Nov. 14)** 

_Doha, Qatar_

**misecCON** **(Nov. 22)** 

_Lansing, Michigan_

Terryn Valikodath from Cisco Talos Incident Response will explore the core of DFIR, where digital forensics becomes detective work and incident response turns into firefighting.

**Most prevalent malware files from Talos telemetry over the past week **

**SHA 256:** 47ecaab5cd6b26fe18d9759a9392bce81ba379817c53a3a468fe9060a076f8ca   
**MD5:** 71fea034b422e4a17ebb06022532fdde   
**Typical Filename:** VID001.exe   
**Claimed Product:** N/A   
**Detection Name:** RF.Talos.80 

**SHA 256:** 76491df69a26019139ac11117cd21bf5d0257a5ebd3d67837f558c8c9c3483d8   
**MD5:** b209df2951e29ab5eab4009579b10b8d  
**Typical Filename:** FileZilla\_3.67.1\_win64\_sponsored2-setup.exe   
**Claimed Product:** FileZilla   
**Detection Name:** W32.76491DF69A-95.SBX.TG

**SHA 256:** c20fbc33680d745ec5ff7022c282a6fe969c6e6c7d77b7cfac34e6c19367cf9a   
**MD5:** 3bc6d86fc4b3262137d8d33713ed6082   
**Typical Filename:** 8c556f0a.dll   
**Claimed Product:** N/A   
**Detection Name:** Gen:Variant.Lazy.605353 

**SHA 256:** f0d7a2bb0c5db162332418747ba4987027b8a746b24c919a24235ff3b70d25e3   
**MD5:** 0d849044612667362bc88780baa1c1b7   
**Typical Filename:** CryptX.dll   
**Claimed Product:** N/A    
**Detection Name:** Gen:Variant.Lazy.605353 

**SHA 256:** 331fdf5f1f5679a6f6bb0baee8518058aba8081ef8f96e57fa3b74291fcbb814   
**MD5:** f23b90fc9bc301baf3e399e189b6d2dc   
**Typical Filename:** B.dll   
**Claimed Product:** N/A     
**Detection Name:** Gen:Variant.Lazy.605353

CISA is warning us (again) about the threat to critical infrastructure networks

The malware, called "BabyLockerKZ," has primarily affected users in Europe and South America.

*   Cisco Talos has discovered a financially motivated threat actor, active since 2022, recently observed delivering a MedusaLocker ransomware variant. 
*   Intelligence collected by Talos on tools regularly employed by the threat actor allows us to see an estimate of the amount and countries of origin of this group’s victims. This actor has been active since at least late 2022 and targets organizations worldwide, although the number of victims was higher than average in EU countries until mid-2023 and, since then, in South American countries.
*   This threat actor was observed distributing a MedusaLocker ransomware variant known as “BabyLockerKZ.” This variant is compiled with a PDB path containing the word “paid\_memes” which is also present in other tools observed during the attacks, presumably by the same author.
*   Talos has new information on the attacker’s tools, including BabyLockerKz and attacker TTPs and IOCs to assist in detecting and preventing further attacks.

Talos has recently observed an attack leading to the deployment of a MedusaLocker ransomware variant known as “BabyLockerKZ.” The distinguishable techniques — including consistently storing the same set of tools in the same location on compromised systems, the use of tools that have the PDB path with the string “paid\_memes,” and the use of a lateral movement tool named “checker” — used in the attack led us to take a deeper look to try to understand more about this threat actor. 

This attacker uses several publicly known attack tools and living-off-the-land binaries (LoLBins), a set of tools built by the same developer (possibly the attacker) to assist in credential theft and lateral movement in compromised organizations. These tools are mostly wrappers around publicly available tools that include additional functionality to streamline the attack process and provide graphical or command-line interfaces. 

The same developer built the MedusaLocker variant used in the initial attack. This variant that uses the same chat and leak site URLs contains several differences to the original MedusaLocker ransomware, such as a different autorun key or an extra public and private key set stored in the registry. Based on the name of the autorun key, the attackers call this variant “BabyLockerKZ.” 

We assess with medium confidence that the actor is financially motivated, likely working as an IAB or an affiliate of a ransomware cartel, and has been carrying out attacks since at least 2022. Our telemetry indicates that the actor opportunistically targeted many victims worldwide. In late 2022 and early 2023, most victims were in European countries, but since the first quarter of 2023, the group’s focus shifted toward South American countries and, as a result, the number of victims per month almost doubled.

**Tracking BabyLockerKZ across the globe**

Intelligence collected by Talos on tools regularly employed by the threat actor allows us to estimate the number of, and the countries of origin of the victims. Although this is unlikely to capture all of the adversary’s activities, it still provides a look at a specific window of activity.

The actor has been active since at least October 2022. At that time, the targets were mostly located in European countries such as France, Germany, Spain or Italy. During the second  quarter of 2023, the attack volume per month almost doubled, and the group shifted its focus toward South American countries such as Brazil, Mexico, Argentina and Colombia, as shown in the chart below. The attacks kept a steady volume of around 200 unique IPs compromised per month until the first quarter of 2024 when the attacks decreased.

The actor has consistently compromised a large number of organizations, often more than 100 per month, since at least 2022. This reveals the professional and highly aggressive nature of the attacks and is coherent with the activity we would expect from an IAB or ransomware affiliate.

During the attack leading to the deployment of the BabyLockerKZt, the adversary used several publicly known attack tools and others that could be unique to this actor. The group frequently used the Music, Pictures or Documents user folders of compromised systems to store attack tools. For example, the following paths were used to store tools during this attack:

*   c:\\users\\<user>\\music\\advanced\_port\_scanner\_2.5.3869.exe
*   c:\\users\\<user>\\music\\hrsword\\hrsword install.bat
*   c:\\users\\<user>\\music\\killav\\build.004\\disabler.exe
*   c:/users/<user>/music/checker/checker(222).exe
*   c:/users/<user>/music/checker/invoke-thehash.ps1
*   c:/users/<user>/music/checker/checker (222).exe
*   c:/users/<user>/music/checker/invoke-smbexec.ps1
*   c:/users/<user>/music/checker/invoke-wmiexec.ps1
*   c:/users/<user>/appdata/roaming/ntsystem/ntlhost.exe.exe
*   c:/users/<user>/appdata/local/temp/advanced port scanner 2/advanced\_port\_scanner.exe
*   c:/users/<user>/appdata/local/temp/is-juad3.tmp/advanced\_port\_scanner\_2.5.3869.tmp

These are similar to a previous attack leading to MedusaLocker ransomware, documented by ASEC in February 2023, which our telemetry suggests was a more active period for this threat actor.

Some of the publicly known tools used by the attacker are:

*   HRSword\_v5.0.1.1.rar: A tool used to disable AV and EDR software.
*   Advanced\_Port\_Scanner\_2.5.3869.exe: A network-scanning tool with several additional features to map internal networks and devices.
*   Netscan.exe: SoftPerfect Network Scanner: A tool similar to Advanced Port Scanner.
*   Processhacker.exe: Process Monitoring and administration software. Allows a TA to enumerate and control processes running on the infected endpoint.
*   PCHunter64.exe: A tool similar to processhacker.
*   Mimikatz: A tool to dump Windows user credentials from memory.

While most of the tools the attacker uses are publicly available, they also use some tools that are not widely distributed that streamline the attack process by automating the interaction between popular attack tools (e.g., Mimikatz, Invoke-the-hash, PSEXEC, RDP) and by adding convenient functionality and interfaces. One of these tools, called “Checker” used in an attack that deployed BabyLockerKZ, consisted of pivotal characteristics of BabyLockerKZ, the “Checker” tool has a PDB path containing the string “**paid\_memes**”. Pivoting off this string, we identified files on VirusTotal, of which most are BabyLockerKZ samples. We also discovered several other tools, which we’ll outline below.

Checker (E:\\**paid\_memes**\\wmi\_smb\_rdp\_checker\\Release\\checker.pdb) is an app that bundles several other freely available apps and provides a GUI for management of credentials as the attackers proceed with lateral movement. In particular it contains a set of tools:

*   Remote Desktop Plus
*   PSEXEC
*   MIMIKATZ

And a set of scripts based on the Invoke-TheHash tool.

The tool also contains a GUI, as shown below, and a database to store the credentials.

As the image illustrates, the tool can be used to scan IPs for valid credentials using several protocols/techniques (PSEXEC, RDP, SMB and WMI) and is prepared to import data from lists of hosts and some of the tools in the attacker toolset, such as Mimikatz, as well as an advanced port scanner. The tool can also decrypt hashes and offers the convenience of a GUI to store a database of the hosts and respective credentials that have been obtained or verified.

**PTH project**

The PTH (D:\\Projects\\**paid\_memes**\\PTH\\Release\\PTH.pdb) name suggests the pass-the-hash technique to use NTLM hashes to authenticate remotely without having to crack the password. Looking at its resources it embeds:

*   Invoke-SMBClient.ps1
*   Invoke-SMBEnum.ps1
*   Invoke-SMBExec.ps1
*   Invoke-TheHash.ps1
*   Invoke-WMIExec.ps1

These were also used in the checker tool and are part of Invoke-TheHash. According to the author: 

_“Invoke-TheHash contains PowerShell functions for performing pass the hash WMI and SMB tasks. WMI and SMB connections are accessed through the .NET TCPClient. Authentication is performed by passing an NTLM hash into the NTLMv2 authentication protocol. Local administrator privilege is not required client-side.”_

MIMIK (D:\\Projects\\**paid\_memes**\\mimik\\Release\\stub\_mimik.pdb) is a wrapper around Mimikatz and rclone that can be used to steal credentials and automatically upload them to an attacker-controlled server. The following image shows the terminal output for the tool.

The following command lines are examples of commands executed via the tool:

*   64.exe privilege::debug sekurlsa::logonPasswords token::elevate lsadump::sam full exit 
*   C:\\Users\\user\\Desktop\\64.exe 64.exe "privilege::debug" "sekurlsa::logonPasswords" "token::elevate" "lsadump::sam full" exit 
*   64.exe "privilege::debug" "sekurlsa::logonPasswords" "token::elevate" "lsadump::sam full" exit
*   C:\\Users\\user\\Desktop\\rclone.exe rclone rcd --rc-no-auth --bwlimit=30M
*   C:\\Users\\user\\Desktop\\rclone.exe rclone rc operations/stat

**BabyLockerKZ**

BabyLockerKZ is a variant of MedusaLocker that has been around at least since late 2023 and has been analyzed by other researchers, although not specifically called out as a MedusaLocker variant with this name. 

A Cynet blog post on the malware used the name “Hazard” for a MedusaLocker variant (named after the extension used for encrypted files) and mentions the existence of the BabyLockerKZ registry key. 

Another post from Whitehat mentions the existence of PAIDMEMES PUBLIC and PRIVATE registry keys on a MedusaLocker sample. 

This variant has not been given much attention outside of that, though, possibly because it’s highly similar to MedusaLocker or because it uses the same chat and leak sites as MedusaLocker. But there are several notable differences between BabyLockerKZ and MedusaLocker, such as:

*   No {8761ABBD-7F85-42EE-B272-A76179687C63} mutex.
*   No MDSLK reg key.
*   The PAIDMEMES Public and private keys.
*   The BabyLockerKZ run key.

The use of the PAIDMEMES public and private keys is unclear. In their post, Whitehat mentioned that they believe the keys aren’t necessary for the encryption process, as the Linux version doesn’t use them. Further research into the use of these keys might be a topic for another blog post.

**Coverage**

Ways our customers can detect and block this threat are listed below.

Cisco Secure Endpoint (formerly AMP for Endpoints) is ideally suited to prevent the execution of the malware detailed in this post. Try Secure Endpoint for free here.

Cisco Secure Web Appliance web scanning prevents access to malicious websites and detects malware used in these attacks.

Cisco Secure Email (formerly Cisco Email Security) can block malicious emails sent by threat actors as part of their campaign. You can try Secure Email for free here.

Cisco Secure Firewall (formerly Next-Generation Firewall and Firepower NGFW) appliances such as Threat Defense Virtual, Adaptive Security Appliance and Meraki MX can detect malicious activity associated with this threat.

Cisco Secure Network/Cloud Analytics (Stealthwatch/Stealthwatch Cloud) analyzes network traffic automatically and alerts users of potentially unwanted activity on every connected device.

Cisco Secure Malware Analytics (Threat Grid) identifies malicious binaries and builds protection into all Cisco Secure products.

Umbrella, Cisco’s secure internet gateway (SIG), blocks users from connecting to malicious domains, IPs and URLs, whether users are on or off the corporate network. Sign up for a free trial of Umbrella here.

Cisco Secure Web Appliance (formerly Web Security Appliance) automatically blocks potentially dangerous sites and tests suspicious sites before users access them. 

Additional protections with context to your specific environment and threat data are available from the Firewall Management Center.

Cisco Duo provides multi-factor authentication for users to ensure only those authorized are accessing your network. 

**Open-source Snort Subscriber Rule Set** customers can stay up to date by downloading the latest rule pack available for purchase on Snort.org. SIDs for this threat: Snort3 Rules: 1:300998:1:0 Snort2 Rules: 1:63928:1:0, 1:63929:1:0

**ClamAV** detections are also available for this threat:  
Win.Ransomware.MedusaLocker-10035000-1  
Win.Tool.PassTheHash-10034996-0  
Win.Ransomware.MedusaLocker-10035000-0

**Indicators of Compromise**

IOCs for this research can be found at our Github repository here

**BabylockerKZ:**

33a8024395c56fab4564b9baef1645e505e00b0b36bff6fad3aedb666022599a

b8c994e3ed7dcc9080916119ddc315533c129479f508676d7544b82b2e24745f

63eb3d2886d9cb880c9b0d54b94f3e149b3b5b6215a33a0ef63588a09dcd4499

270c3354b3ee2940b499e365eaba143fba9d458f434dc38e663dc0f08e96121e

759b96f44806578cc0836a3a2bf11c8bc553effac72f8d28b94aec78b66be906

**PTH:**

9f066975f1e02b29c7c635280f405c59704ce4f4e06b04e9ac8a7eac22acd3c7

8bc455e5de35290f8a94376357947bd72aaf6f4d452c25a8ef444e037ef76b9f

**Checker:**

d00f7cf6af68ba832b9d364f28411346cfe66fd3b1f5bcac318766add29ff7f0

1f2df15442593b159e45d16a27e4d43d3a9062da212a588ba4c048f214a0b7be

1e9246e6a35731143368eaa0ade4f3cf576d6b22e6090152f6e94f1fa3070651

6ae3a58a78be9c606009c657de4e390538b21ad951e62b6f4d31138e1a75732c

2eddfe711c32ef1668e14a10d00452c83c29e394e17c41f491550a1583c1bcac

**HOHOL1488:**

dc4840a0992b218cbedd5a7ac5c711cb98f1f9e78a8ffdea37c694061dfd34c6

48046fb0e566f5a2d184f84b76d6cadc458762556daed0ae4a3a1200afbefb54

c0c726a23111c220d022fcd01a85f9788249e42baece03f83b6059170453b801

012657c4548d9c98223caa4cc7aa52fc083d6983d42fde16ca3271412e7fe3fe

8edbb1944d94ff91ee917c31590b6d1d5690a52fc153e44355ee9749aa0f4625

364f1b7466d8e4c9f55294ecf1f874c763bcf980c59b0250c613ac366def6aca

5d5d639fdfbf632bb7d9f1bb28731217d09d36078ab5e594baf2a5a41267a5d2

**PDB list:**

d:/projects/paid\_memes/virus/release/stub.pdb

e:/locker/bin/stub\_win\_x64\_encrypter.pdb

i:/locker/bin/stub\_win\_x64\_encrypter.pdb

d:/education/locker/bin/stub\_win\_x64\_encrypter.pdb

d:/education/locker/bin/stub\_win\_x86\_encrypter.pdb

d:/projects/paid\_memes/wmi\_smb\_rdp\_checker/release/checker.pdb

d:/projects/paid\_memes/mimik/release/stub\_mimik.pdb

i:/locker/x64/release/phantom.pdb

d:/projects/paid\_memes/pth/release/pth.pdb

**Registry keys:**

HKEY\_USERS\\%SID%\\SOFTWARE\\PAIDMEMES\\PRIVATE

HKEY\_USERS\\%SID%\\SOFTWARE\\PAIDMEMES\\PUBLIC

HKEY\_CURRENT\_USER\\SOFTWARE\\PAIDMEMES\\PUBLIC

HKEY\_CURRENT\_USER\\SOFTWARE\\PAIDMEMES\\PRIVATE

HKCU\\SOFTWARE\\PAIDMEMES\\PUBLIC

HKCU\\SOFTWARE\\PAIDMEMES\\PRIVATE

HKEY\_CURRENT\_USER\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\BabyLockerKZ

HKCU\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\BabyLockerKZ

HKEY\_USERS\\%SID%\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\BabyLockerKZ

**Extension names observed being used by BabyLockerKZ samples:**

crypto125

crypto1317

crypto165

crypto41

crypto76

encrypted1

hazard11

hazard21

hazard23

hazard24

hazard25

hazard27

hazard31

hazard38

hazard49

hazard55

hazard56

hazard7

infected

lock2

lock3

lock5

locked9

lockfiles

meduza210

rapid1

rapid10

readtext13

readtext47

readtext49

recovery29

recovery70

virus2

virus3

virus57

**Encryption key BabyLockerKZ:**

PUTINHUILO1337

**MUTEX BabyLockerKZ:**

HOHOL1488

Threat actor believed to be spreading new MedusaLocker variant since 2022

It shouldn’t just be viewed as a cybersecurity issue, because for a hardware supply chain attack, an adversary would likely need to physically infiltrate or tamper with the manufacturing process.

Thursday, September 26, 2024 14:00

The recent attacks in the Middle East triggering explosions on pagers has raised new fears around physical hardware supply chain attacks. 

In cybersecurity, we typically consider supply chain attacks to target software, in which adversaries infect a legitimate tool with a malicious, fake update that then spreads malware to affected devices. Think SolarWinds, Log4j, MOVEit, etc. 

In the case of hardware supply chain attacks, malicious actors infiltrate the supply of devices, or the physical manufacturing process of pieces of hardware and purposefully build in security flaws, faulty parts, or backdoors they know they can take advantage of in the future, such as malicious microchips on a circuit board.  

For Cisco’s part, the Cisco Trustworthy technologies program, including secure boot, Cisco Trust Anchor module (TAm), and runtime defenses give customers the confidence that the product is genuinely from Cisco. 

As I was thinking about the threat of hardware supply chain attacks, I was left wondering who, exactly, should be tasked with solving this problem. And I think I’ve decided the onus falls on several different sectors. 

It shouldn’t just be viewed as a cybersecurity issue, because for a hardware supply chain attack, an adversary would likely need to physically infiltrate or tamper with the manufacturing process. Entering a manufacturing facility or other stops along the logistics chain would require some level of network-level manipulation, such as faking a card reader or finding a way to trick physical defenses — that’s why Cisco Talos Incident Response looks for these types of things in Purple Team exercises.  

But it’s also a question of logistics and storage. Could a device be tampered with while it’s just being stored in a warehouse awaiting shipment? What about entering the back of a tractor-trailer that’s hauling the devices? Or even just being able to sneak photos of the devices’ information, say, for example, the EID on a cellphone or its SIM card.  

The process to protect against supply chain hardware attacks is not straightforward, unfortunately. There is little synchronization and partnership between logistics, cybersecurity, and manufacturing companies.  

There are also new technologies that can protect against physical tampering, like smart containers, real-time monitoring systems and automated security checkpoints, but these are all expensive solutions for security teams (at the physical and network levels) that are already stretched for budget and human capital.  

The cybersecurity industry certainly has a role to play in addressing supply chain attacks of all kinds, but it’s also not something this community alone can solve.  

**The one big thing **

Attackers are abusing features of legitimate internet websites to transmit spam. This web infrastructure and its associated email infrastructure are otherwise used for legitimate purposes, which makes blocking these messages more difficult for defenders, according to new research from Talos.  

**Why do I care? **

As a spammer, one of the problems with spinning up your own architecture to deliver mail is that once the spam starts flowing, these sources (IPs/domains) can be blocked. Realizing this, many spammers have elected to attack webpages and mail servers of legitimate organizations, so they may use these “pirated” resources to send unsolicited emails. Adversaries are still finding new ways to leverage preexisting tools and structures in email systems to send spam and malicious attachments that defenders wouldn’t normally consider.  

**So now what? **

There are several steps users can take to avoid receiving large amounts of spam or being duped by bad actors using “traditional” email tools. A strong password for your email account, or even better, a password manager, can keep your email account secure. When someone is using unique credentials everywhere, one single compromised account will not impact any other online accounts belonging to that victim. For admins and defenders, educating your users to be wary of such email messages is a good way to prevent them from falling victim to phishing and other attacks that arrive by email. 

**Top security headlines of the week **

**Representatives from cybersecurity company CrowdStrike spoke to U.S. Congress this week about a faulty update that shut down Windows machines across the country earlier this year.** The incident caused disruptions across multiple industries, including commercial flights, public transportation, retail and more. Lawmakers questioned whether the affected software should have access to core systems on computers, and the threat that AI-written code could present in the future. Executives from CrowdStrike took responsibility for the outage. They said the company was doing everything possible to prevent a similar incident from happening again and executing a broad “lessons learned” process. The incident forced over 8 million Microsoft Windows machines into the dreaded “Blue Screen of Death.” For the first 24 hours of the incident, rebooting the systems only worked if the user carried out a specific process that was complicated and needed to be explained by an expert. Eventually, an automatic update rolled out and fixed the issue. (Washington Post, BBC) 

**Security researchers have discovered a new Iranian state-sponsored actor that is providing initial access for other well-known APTs in the same country.** UNC1860 is believed to have ties to Iran’s Ministry of Intelligence and Security (MOIS) and provides access to other Iranian threat actors like OilRig and Scarred Manticore. The group’s focus is reportedly solely focused on breaching networks and obtaining an initial foothold, targeting a range of sectors including government, media, education, critical infrastructure and telecommunications. Researchers say UNC1860 has teamed up for attacks targeting organizations in Iraq, Saudi Arabia and Qatar, and laid the groundwork for wiper attacks in Albania and Israel. The group’s activities had gone largely undetected thus far because their implants are entirely passive, and don’t send any information out of the target network. The APT also doesn’t rely on any kind of command and control (C2) infrastructure. (Dark Reading, SecurityWeek) 

**Popular AI chat tool ChatGPT contains a flaw that could allow adversaries to implant false “memories” and steal user data in perpetuity.** A security researcher discovered a proof of concept in which they could store false information and malicious instructions in a user’s long-term memory settings through indirect prompt injection. The researcher first reported the vulnerability to OpenAI, the creator of ChatGPT, in May, but at the time the issue was labeled as a safety issue and not a security issue, closing out the case. After developing the POC, the company eventually released a partial fix earlier this month that prevents memories from being abused as an exfiltration vector. However, an adversary could still implant long-term information into ChatGPT through prompt injections targeting the memory tool, just not through the traditional ChatGPT web interface that most users access the tool through. (Ars Technica, wunderwuzzi's blog) 

**Can’t get enough Talos? ****Upcoming events where you can find Talos**

**VB2024** **(Oct. 2 - 4)** 

_Dublin, Ireland_ 

**MITRE ATT&CKcon 5.0** **(Oct. 22 - 23)** 

_McLean, Virginia and Virtual_

Nicole Hoffman and James Nutland will provide a brief history of Akira ransomware and an overview of the Linux ransomware landscape. Then, morph into action as they take a technical deep dive into the latest Linux variant using the ATT&CK framework to uncover its techniques, tactics and procedures.

**misecCON** **(Nov. 22)** 

_Lansing, Michigan_

Terryn Valikodath from Cisco Talos Incident Response will explore the core of DFIR, where digital forensics becomes detective work and incident response turns into firefighting.

**Most prevalent malware files from Talos telemetry over the past week **

**SHA 256:** a31f222fc283227f5e7988d1ad9c0aecd66d58bb7b4d8518ae23e110308dbf91    
**MD5:** 7bdbd180c081fa63ca94f9c22c457376   
**Typical Filename:** c0dwjdi6a.dll   
**Claimed Product:** N/A    
**Detection Name:** Trojan.GenericKD.33515991 

**SHA 256:** 47ecaab5cd6b26fe18d9759a9392bce81ba379817c53a3a468fe9060a076f8ca   
**MD5:** 71fea034b422e4a17ebb06022532fdde   
**Typical Filename:** VID001.exe   
**Claimed Product:** N/A   
**Detection Name:** RF.Talos.80 

**SHA 256:** 76491df69a26019139ac11117cd21bf5d0257a5ebd3d67837f558c8c9c3483d8   
**MD5:** b209df2951e29ab5eab4009579b10b8d  
**Typical Filename:** FileZilla\_3.67.1\_win64\_sponsored2-setup.exe   
**Claimed Product:** FileZilla   
**Detection Name:** W32.76491DF69A-95.SBX.TG 

**SHA 256:** 5e537dee6d7478cba56ebbcc7a695cae2609010a897d766ff578a4260c2ac9cf   
**MD5:** 2cfc15cb15acc1ff2b2da65c790d7551   
**Typical Filename:** rcx4d83.tmp   
**Claimed Product:** N/A     
**Detection Name:** Win.Dropper.Pykspa::tpd 

**SHA 256:** 581866eb9d50265b80bae4c49b04f033e2019797131e7697ca81ae267d1b4971   
**MD5:** 4c5fdfd4868ac91db8be52a9955649af   
**Typical Filename:** N/A   
**Claimed Product:** N/A   
**Detection Name:** W32.581866EB9D-100.SBX.TG

Are hardware supply chain attacks “cyber attacks?”

Many spammers have elected to attack web pages and mail servers of legitimate organizations, so they may use these “pirated” resources to send unsolicited email.

Thursday, September 26, 2024 09:00

*   Attackers are abusing normal features of legitimate web sites to transmit spam, such as the traditional method of verifying the creation of a new account. 
*   This web infrastructure and its associated email infrastructure is otherwise used for legitimate purposes, which makes blocking these messages more difficult for defenders. 
*   The breadth of different sources of spam suggests that the attackers have automated the process of initially identifying web infrastructure vulnerable to abuse. However, the complexity of executing each individual attack suggests more human involvement. 
*   Attackers are also testing credentials obtained from data breaches by credential stuffing IMAP and SMTP accounts. 

Spammers are always looking for creative ways to bypass spam filters. As a spammer, one of the problems with creating your own architecture to deliver mail is that, once the spam starts flowing, these sources (IPs/domains) can be blocked. Spam can more easily find its way into the inbox if it is delivered from an unexpected or legitimate source. Realizing this, many spammers have elected to attack web pages and mail servers of legitimate organizations, so they may use these “pirated” resources to send unsolicited email. 

There are many ways spammers accomplish this task: One is to abuse web pages connected to backend SMTP infrastructure, and another uses breached email/password credentials to try and log into email accounts they can use to send spam. Cisco Talos has new research that explores both styles of attack and delves into some of the tools used by spammers. 

**Web form abuse **

The HTML <form> tag was released with HTML version 2.0, nearly 30 years ago. Since then, spammers have found creative ways to abuse web forms. The lack of proper input validation left many of these forms open to manipulation by attackers. Over time, these HTML form attacks became more sophisticated, sometimes employing cross-site scripting or SQL injection. Many administrators learned the hard way that their forms were vulnerable and were forced to harden their forms as a result. However, spammers are a persistent bunch, and they look for anything they can use to facilitate malicious activities. Creative spammers have realized that \*any\* web form that triggers an email back to the user can be abused. 

**Online account registration **

Many websites allow users to sign up for an account and log in to access specific features or content. Typically, upon successful user registration, an email is triggered back to the user to confirm the account. In this case, the spammers have overloaded the name field with text and a link, which is unfortunately not validated or sanitized in any way. The resulting email back to the victim contains the spammer’s link. 

An example spam message exploiting an account signup form

**Event signup **

Like account registration, many websites let users register to participate in an event. Again, poor input validation and sanitization is prevalent on many of these sites, allowing the spammers to overload the name field with text and URLs. 

An example spam message exploiting an event registration form

Contact forms sometimes send users a copy of their form responses. This could be a checkbox on the form or an automatic reply. Again, the spammers rely on poor input validation and sanitization to transmit text and URLs to the victim. 

An example spam message exploiting a web site contact form

**Google Quizzes, Calendar, Groups and other apps **

Talos previously reported on spammers abusing Google Quizzes. But that is not the only Google software that spammers have been abusing. Google Drawings, Sheets, Forms, Calendar and Groups all contain similar vulnerabilities that allow spammers to send unsolicited emails to victims. Additionally, by using a variety of Google applications, and ones that are located in different countries, they can largely avoid detection by Google. 

These messages from Google require some significant pre-attack setup. For example, to send spam from Google Quizzes, the attackers must set up a quiz and configure it correctly, then they must fill out the quiz, masquerading as the victim. Then, the attackers must log back into the Google Quiz they created to “grade” the results and send the quiz score email back to the victim. This suggests a significant human interaction on the part of the spammers. 

An example spam message sent via Google Drawings

An example spam message sent via Google Sheets

An example spam message sent via Google Forms

An example spam message sent via Google Calendar

An example spam message sent via Google Groups

Unfortunately for defenders, there is very little we can do to defend against such spam messages. Most of the emails sent by these contact forms are legitimate, so the malicious email blends in with the otherwise legitimate traffic. However, on the positive side, some of the extra content in the emails gives away that the message is not legitimate.   

**SMTP server credential stuffing **

Have you ever wondered what cyber criminals do with all the information they’ve obtained in a data breach? If the stolen dataset contains email address usernames and passwords, then it is quite probable that those same credentials will work in other places. Trying the same set of credentials at other sites is known as “credential stuffing.”  

One of the main ways cybercriminals leverage stolen credentials is attempting to access the victim’s email. POP/IMAP servers are often juicy targets, because if an attacker can access a person’s email inbox, then they can find other accounts used by the victim, account usernames/passwords, cryptocurrency wallet keys or perhaps other lucrative, sensitive personal information. Attackers can also leverage access to the victim’s inbox to receive email-based multifactor authentication codes or password resets. 

One of the other, lesser-known ways attackers leverage stolen credentials is on the outbound side of the victim’s mailbox. If an attacker can log into the outbound smtp server as the victim, they can send out email using the victim’s email server. This provides the cybercriminal with a legitimate mail server and domain which are not likely blocked by various spam real-time blackhole lists (RBLs). 

How do cybercriminals locate mailboxes that have working credentials? Typically, the attacker will set up a personal mailbox somewhere (Yahoo, Gmail, etc.) and then send themselves test messages using the stolen credentials at the outbound SMTP server matching the email address’ domain. Some criminals have turned this into an online business by finding working SMTP server credentials and selling them to others. 

__A test email from Smart Tools Shop. The price of working SMTP server credentials is $6__

__The Smart Tools Shop interface shows the typical prices of SMTP server credentials__ 

There are also open-source tools used for these sorts of activities. Among the tools Talos sees most frequently are MadCat and MailRip, both of which are available to download and run on GitHub. 

The MadCat SMTP cracker tool found on Github

 MadCat is an open-source SMTP tool that includes credential-stuffing capabilities. The test emails can be recognized from the Subject header: “Subject: You get a new smtp”. Among some of MadCat’s advertised features is the ability to skip emails hosted by known security vendors such as Cisco. This feature is implemented rather poorly, however, because the code used to skip “dangerous emails” is simply a regular expression with words like “cisco,” “cloudflare,” “proofpoint,” etc., as if spam traps implemented by security organizations are all run out of the main corporate domain name (S_poiler alert: they are not_). 

__MailRip is another open-source tool capable of credential stuffing in outbound SMTP servers__

Another tool that Talos frequently sees performing credential stuffing is a program named MailRip. Although it contains a disclaimer that the code is not to be used “for any kind of illegal activity,” it is a tool primarily designed to facilitate checking username/password combos on IMAP servers and outbound SMTP servers. 

Besides these commercial and open-source tools, Talos also sees attackers who have “rolled their own” tools used for this activity. Typically, the Subject headers are a giveaway that the messages are test emails looking for valid SMTP accounts. However, some of the subject headers and email bodies of test messages are encoded/encrypted. Below are some of the more frequent Subject headers Talos has encountered. 

**Common Credential Stuffing Test Message Subject headers:**   
Subject: Mail Inbox Test IDF50F22   
Subject: You get a new smtp **_(from MadCat SMTP cracker tool)_**   
Subject: smtp id 2496130   
Subject: g1ukczr0iz3b6o6xsk0al0tyqy8ggr **_(encrypted/encoded Subject/Body)_**   
Subject: test   
Subject: Testing: mx.example.com   
Subject: new SMTP from MadCat checker   
Subject: Smart Tools Shop - Test SMTP ID: 1016587   
Subject: MailRip Test Result ID0BAB7A **_(from MailRip Tool)_**   
Subject: !XProad mx.example.com|2525|nywepaq@example.com|f29r21caT4. **_(from Laravel Monster Tool)_**   
Subject: SMTP Check #131085 - Jemex Shop   
Subject: TESTING RELAY!   
Subject: SMTP Check #6148 - Spyxe Shop   
Subject: Your Account ID #62363   
Subject: Mail Test Result ID0CD637.    
Subject: aloha: 127.0.0.255   
Subject: Mail Auto-Email ID86E8A6   
Subject: Mail Email Test ID23CB4D   
Subject: Mail Test Result IDD762AB   
Subject: =?utf-8?q?New\_working\_smtp\_=2350131001?=  

**Thwarting SMTP server credential stuffers **

One way Talos has tried to thwart these types of attacks is to make them believe that the actors have found a working outbound email account.  

To accomplish this, Talos has configured some of our spam traps to deliver those messages we have identified by Subject as test messages from the credential stuffers, while every other email is sent to various internal anti-spam systems for processing. Once the credential stuffers believe they have found a valid account, they typically turn on the spam firehose, which causes all the connecting IP addresses to be dinged for sending spam, which significantly affects those addresses' ability to deliver mail to the inbox. 

 The anti-spam industry has largely been successful at driving a wedge between legitimate senders and spammers, causing spammers to seek out new ways to deliver their mail.  

Rather than send directly, these spammers have chosen to try and blend in with legitimate traffic to make their spam more difficult to block.  

**Defenses **

**_Create Unique Passwords:_** People are terrible at creating and remembering good passwords. For the past several decades, even, the most popular unsafe password has been “123456”. Despite years of guidance from the security community that people should use a unique password for every website, many users will re-use the same credentials at several different sites. When someone is using unique credentials everywhere, one single compromised account will not impact any other online accounts belonging to that victim.  

**Use a password manager:** All those unique passwords you have been creating are going to be hard to remember. But avoid storing credentials in a browser. These can be stolen by attackers quite easily. A perfect tool exists for storing your passwords: a password manager. It is best to use a dedicated password manger such as KeePass, LastPass or 1Password. 

**Educate Users:** Unfortunately for defenders, there is very little we can do to defend against spam messages sent from legitimate forms. Most of the emails sent via forms are legitimate, so the malicious email blends in with the otherwise legitimate email traffic. However, on the positive side, some of the extra content in the emails gives away that the message is not legitimate. Educating your users to be wary of such email messages is a good way to prevent them from falling victim to phishing and other attacks that arrive by email.

Simple Mail Transfer Pirates:   How threat actors are abusing third-party infrastructure to send spam

Talos researchers have disclosed three vulnerabilities in OpenPLC, a popular open-source programmable logic controller.

Wednesday, September 25, 2024 12:00

Cisco Talos’ Vulnerability Research team recently disclosed two vulnerabilities in Microsoft products that have been patched by the company over the past two Patch Tuesdays. 

One is a vulnerability in the High-Definition Audio Bus Driver in Windows systems that could lead to a denial of service, while the other is a memory corruption issue that exists in a multicasting protocol in Windows 10. 

Additionally, Talos researchers have disclosed three vulnerabilities in OpenPLC, a popular open-source programmable logic controller.  

For Snort coverage that can detect the exploitation of these vulnerabilities, download the latest rule sets from Snort.org, and our latest Vulnerability Advisories are always posted on Talos Intelligence’s website. 

**Microsoft High-Definition Audio Bus Driver denial-of-service vulnerability **

_Discovered by Marcin “Icewall” Noga._ 

TALOS-2024-2008 (CVE-2024-45383) is a vulnerability in the Microsoft HD Audio Bus Driver that could allow an attacker to cause a denial of service. 

The driver allows the Windows operating system to communicate with external audio devices that play sound, including those that are integrated into machines’ motherboards or connected via HD audio interfaces.  

A mishandling of IRP requests in the driver’s interface could allow an attacker to send multiple IRP Complete requests to the driver, causing the DoS and forcing the operating system into the “Blue Screen of Death.” 

**Stale memory dereference in Microsoft Pragmatic General Multicast Server **

_Discovered by a Cisco Talos researcher._ 

A memory corruption vulnerability exists in the Pragmatic General Multicast server in the Microsoft Windows 10 Kernel.  

The Pragmatic General Multicast protocol is an IP-based multicasting protocol that is implemented by Microsoft as part of the Message Queueing service available in different versions of Windows. 

A specially crafted network packet can lead to the access of stale memory structure, resulting in memory corruption. An attacker can send a sequence of malicious packets to trigger TALOS-2024-2062 (CVE-2024-38140). 

Talos independently discovered this issue and reported it to Microsoft prior to their patch release earlier this year. However, Microsoft informed us that an internal researcher had already discovered this issue. 

**Three vulnerabilities in OpenPLC **

_Discovered by Jared Rittle_.

Talos recently discovered three vulnerabilities in OpenPLC, an open-source programmable logic controller designed to provide a low-cost option for automation in many manufacturing and logistics settings. 

Two of the issues — TALOS-2024-2004 (CVE-2024-36980, CVE-2024-36981) and TALOS-2024-2016 (CVE-2024-39589, CVE-2024-39590) — can lead to a denial-of-service on the targeted device. An adversary could exploit these vulnerabilities by sending a series of specially crafted Ethernet/IP requests. 

Another stack-based buffer overflow vulnerability, TALOS-2024-2005 (CVE-2024-34026), can also be exploited in this way. However, in this case, it could lead to remote code execution.

Talos discovers denial-of-service vulnerability in Microsoft Audio Bus; Potential remote code execution in popular open-source PLC

This year, Congress only allocated $55 million in federal grant dollars to states for security and other election improvements.

Thursday, September 19, 2024 14:00

Last week, six Secretaries of State testified to U.S. Congress about the current state of election security ahead of November’s Presidential election. 

Some of the same topics came up as usual — disinformation campaigns, influence from foreign actors, and the physical protection of poll workers on election day. 

It’s good that these conversations are continuing after the various revelations that came out after the 2016 presidential election, and election security is an issue globally, especially this year when there are major elections taking place in hundreds of countries.  

As with many things in politics and life, though, there is still an issue of money. 

Talk of the importance of election security is positive, but at the end of the day, states and municipalities will need monetary and human resources to implement the appropriate defenses and protect everything from voting machines to online vote-tallying systems and social media disinformation campaigns.  

Arizona Secretary of State Adrian Fontes used his time in front of Congress to ask for additional funding, because his state has been unable to execute all their election security goals.  

“None of this is free and none of it is cheap,” he said. “Our operations, administration and security depend on intermittent, rare and never enough funding for the Help America Vote Act grants that we are occasionally given by Congress.” 

Additional federal funds became available for U.S. elections in 2017 after the Department of Homeland Security deemed election systems to be critical infrastructure. But this year, Congress only allocated $55 million in federal grant dollars to states for security and other improvements to elections. For comparison’s sake, presidential and Congressional candidates in the U.S. spent $14 billion on their election campaigns, more than double the amount from 2016. 

At the time, Republican lawmakers in the House voted to totally zero out the fund for the Help America Vote Act, or HAVA, grants, which have existed since 2002. 

One lobbyist even told the Stateline outlet earlier this year that many states were trying to stretch the money they do get from the HAVA program across multiple years for fear of a lack of funding in the coming election cycles.  

JP Martin, deputy communications director for the Arizona secretary of state, said in that same article that Arizona (a crucial swing state in most presidential elections) has had to put a hiring freeze in place because a lack of federal funding. 

So, talk, awareness and planning to secure elections are all positive things. But at the end of the day, all these technologies and solutions, and the people that provide them, cost money. 

**The one big thing **

Cisco Talos’ Vulnerability Research team discovered two vulnerabilities have been disclosed and fixed over the past few weeks. Talos discovered a time-of-check time-of-use vulnerability in Adobe Acrobat Reader, one of the most popular PDF readers currently available, and an information disclosure vulnerability in the Microsoft Windows AllJoyn API. 

**Why do I care? **

AllJoyn is a DCOM-like framework for creating method calls or sending one-way signals between applications on a distributed bus. It primarily is used in internet-of-things (IoT) devices to tell the devices to perform certain tasks, like turning lights on or off or reading the temperature of a space. TALOS-2024-1980 (CVE-2024-38257) could allow an adversary to view uninitialized memory on the targeted machine. Adobe Acrobat Reader, one of the most popular pieces of PDF reading software currently available, contains a time-of-check, use-after-free vulnerability that could trigger memory corruption, and eventually, arbitrary code execution. 

**So now what? **

For Snort coverage that can detect the exploitation of these vulnerabilities, download the latest rule sets from Snort.org, and our latest Vulnerability Advisories are always posted on Talos Intelligence’s website.  

**Top security headlines of the week **

**Experts and governments are still unpacking a wave of pager and handheld radio explosions in the Middle East.** The attacks appeared to target members of the armed group Hezbollah in Lebanon when hundreds of devices exploded simultaneously on Tuesday, killing multiple people. The international community has been left wondering if this was some type of cyber attack or intentional physical implants in the devices. Messages sent at the time of the attack appeared to come from Hezbollah leadership but instead triggered the explosions. Most analysts are assuming that this was a hardware supply chain attack, in which the pagers were tampered with somehow during manufacturing or while they were in transit. Supply chain attacks are normally carried out at the software level. So far, no one has taken credit for the attacks, though Hezbollah is blaming Israel, one of its chief antagonists. (Reuters, BBC) 

**Ransomware gangs are increasingly leveraging Microsoft Azure to steal victims’ information and store it.** New research findings indicate that groups like BianLian and Rhysida use Microsoft's Azure Storage Explorer and AzCopy to steal data from infiltrated networks, then store it in Azure Blob storage until it can be transferred to an attacker-controlled network. Because Azure is a popular and trusted service, corporate firewalls and security tools are unlikely to block it, making the data transfers more likely to pass undetected. Potential targets that use Azure are recommended to log out of the application after each use to prevent attackers from using the active session for file theft. (Bleeping Computer, modePUSH) 

**Health care facilities and medical devices continue to be top targets for ransomware actors, and industry leaders are calling on the U.S. federal government to do more to assist them.** This year, several massive health care providers across the globe have been affected by cyber attacks, forcing countless surgeries and appointments to be rescheduled and putting sensitive medical records at risk. Past victims include Change Healthcare, Kaiser Permanente and Ascension. One health care executive told NPR that their company was still trying to calculate the financial impact of the Change attack, which paused payments from insurance for months. They are only just now being paid out for services rendered in July. U.S. Sen. Ron Wyden, the chair of the Senate Finance Committee, recently publicly called on the Health and Human Services Department to revise its current approach to cybersecurity, because the current system “is woefully inadequate and has left the health care system vulnerable to criminals and foreign government hackers.” Other experts have said that HHS has traditionally focused on physical disasters like earthquakes, storms and power outages, and not enough on cyberspace. (NPR, Security Intelligence) 

**Can’t get enough Talos? **

*   Despite Russia warnings, Western critical infrastructure remains unprepared 
*   The Cybersecurity Cat-And-Mouse Game 
*   DragonRank Manipulates SEO Rankings To Direct Users To Malicious Sites 

**Upcoming events where you can find Talos**

**VB2024** **(Oct. 2 - 4)** 

_Dublin, Ireland_ 

**MITRE ATT&CKcon 5.0** **(Oct. 22 - 23)** 

_McLean, Virginia and Virtual_

Nicole Hoffman and James Nutland will provide a brief history of Akira ransomware and an overview of the Linux ransomware landscape. Then, morph into action as they take a technical deep dive into the latest Linux variant using the ATT&CK framework to uncover its techniques, tactics and procedures.

**misecCON** **(Nov. 22)** 

_Lansing, Michigan_

Terryn Valikodath from Cisco Talos Incident Response will explore the core of DFIR, where digital forensics becomes detective work and incident response turns into firefighting.

**Most prevalent malware files from Talos telemetry over the past week **

**SHA 256:** b9ddbd1a4cec61e6b022a275d66312b5b676f9a0a9537a7708de9aa8ce34de59   
**MD5:** 3b100bdcd61bb1da816cd7eaf9ef13ba   
**Typical Filename:** vt-upload-C6In1   
**Claimed Product:** N/A    
**Detection Name:** Backdoor:KillAV-tpd  

**SHA 256:** 47ecaab5cd6b26fe18d9759a9392bce81ba379817c53a3a468fe9060a076f8ca   
**MD5:** 71fea034b422e4a17ebb06022532fdde   
**Typical Filename:** VID001.exe   
**Claimed Product:** N/A   
**Detection Name:** RF.Talos.80 

**SHA 256:** 70ff63cd695033f624a456a5c8511ce8312cffd8ac40492ffe5dc7ae18548668   
**MD5:** 49d35332a1c6fefae1d31a581a66ab46   
**Typical Filename:** 49d35332a1c6fefae1d31a581a66ab46.virus   
**Claimed Product:** N/A     
**Detection Name:** W32.Auto:70ff63.in03.Talos 

**SHA 256:** 3a2ea65faefdc64d83dd4c06ef617d6ac683f781c093008c8996277732d9bd66   
**MD5:** 8b84d61bf3ffec822e2daf4a3665308c   
**Typical Filename:** RemComSvc.exe   
**Claimed Product:** N/A   
**Detection Name:** W32.3A2EA65FAE-95.SBX.TG 

**SHA 256:** 35dcf857f0bb2ea75bf4582b67a2a72d7e21d96562b4c8a61b5d598bd2327c2c   
**MD5:** fab8aabfdabe44c9a1ffa779fda207db   
**Typical Filename:** ACenter.exe   
**Claimed Product:** Aranda AGENT   
**Detection Name:** Win.Trojan.Generic::tg.talos

Talk of election security is good, but we still need more money to solve the problem

A June report from CyberSeek found that there are only enough skilled workers to fill 85 percent of cybersecurity jobs in America.

Thursday, September 12, 2024 14:00

I have written about the dreaded “cybersecurity skills gap” more times than I can remember in this newsletter, but I feel like it’s time to revisit this topic again.  

That’s because the White House announced a new initiative last week for the U.S. government called the “Service for America” initiative designed to train new workers in the cybersecurity field. This measure directs U.S. federal agencies to help recruit and prepare Americans for jobs in cybersecurity and AI by removing certain degree requirements and emphasizing skills-based hiring. This means, hopefully, more educational resources for people looking to break into cybersecurity. 

On its face, I’m all in favor of this. I did eventually go back to school to get my associate's degree in cybersecurity, but much of what I’ve learned about this field has been from working at Talos and spending time around my talented and intelligent colleagues, many of whom did not go to college for cybersecurity.  

The U.S. government also has separate initiatives to support neurodivergent candidates who want to work in security, as well as those who are blind and visually impaired. 

My concern is that, even if we do train these employees and give them the proper skills, it’s on companies to eventually hire them.  

A June report from CyberSeek found that there are only enough skilled workers to fill 85 percent of cybersecurity jobs in America. Yet hiring in the industry has remained flat, according to a soon-to-be-released report from cybersecurity non-profit ISC2. This year, the global security workforce is estimated to be 5.5 million, which is only a 0.1 percent increase year over year, according to the report. 

Among the more than 15,000 cybersecurity practitioners from around the globe who responded to the study, 38 percent of respondents said their organizations had experienced a cybersecurity hiring freeze over the past year, up 8 percent from 2023. Thirty-seven percent of respondents reported budget cuts to the security program, and another 25 percent said their teams had experienced layoffs.  

That same CyberSeek report also found that, in the U.S., the amount of cybersecurity-related job postings decreased by 29 percent year-over-year. 

So as these skills gap-closing programs begin, we need to be thinking about what skills, exactly, managers want their workers to be trained in. There is obviously some sort of disconnect here between the people who want to work in security compared to the companies or managers who want to hire them. Or there just simply isn’t enough money to go around right now to handle staffing up cybersecurity teams, and that’s just the reality of the current economy in the U.S. and globally.  

I’m not saying this to discourage anyone from entering the security space or spread doom and gloom. But I do think it’s important to acknowledge that there are many already skilled and trained workers who simply cannot find work or are treading water throwing dozens of applications at the wall to see what sticks. 

I’ve seen too many people posting on LinkedIn recently looking for a cybersecurity job to think that the solution to bolstering security is getting \*another\* worker in with the same skillset to compete for the same job opening as someone who’s been in the industry for 10 years. 

**The one big thing **

Talos recently uncovered a new threat called “DragonRank” that primarily targets countries in Asia — and a few in Europe — operating PlugX and BadIIS for search engine optimization (SEO) rank manipulation. DragonRank exploits targets’ web application services to deploy a web shell and utilizes it to collect system information and launch malware such as PlugX and BadIIS, running various credential-harvesting utilities. Their PlugX not only used familiar sideloading techniques, but the Windows Structured Exception Handling (SEH) mechanism ensures that the legitimate file can load the PlugX without raising suspicion. 

**Why do I care? **

This group compromises Windows Internet Information Services (IIS) servers hosting corporate websites, with the intention of implanting the BadIIS malware. BadIIS is malware used to manipulate search engine crawlers and disrupt the SEO of the affected sites. With those compromised IIS servers, DragonRank can distribute the scam website to unsuspecting users. DragonRank engages in SEO manipulation by altering or exploiting search engine algorithms to improve a website's ranking in search results. They conduct these attacks to drive traffic to malicious sites, increase the visibility of fraudulent content, or disrupt competitors by artificially inflating or deflating rankings. These attacks can harm a company's online presence, lead to financial losses, and damage its reputation by associating the brand with deceptive or harmful practices. The actor then takes these compromised websites and promotes them, effectively turning these sites into platforms for scam operations. 

**So now what? **

Talos released a new Snort rule set and several ClamAV signatures to detect and block the malware used in these attacks. Talos has confirmed more than 35 IIS servers had been compromised and deployed the BadIIS malware across a diverse array of geographic regions, including Thailand, India, Korea, Belgium, Netherlands and China in this campaign, so it’s clearly still active and potentially growing. 

**Top security headlines of the week **

**A new type of attack called “RAMBO” could allow adversaries to steal data over air-gapped networks with RAM radio signals.** An Israeli academic researcher recently announced the discovery of RAMBO (Radiation of Air-gapped Memory Bus for Offense), in which an attacker could generate electromagnetic radiation from a device’s RAM to send data from air-gapped computers. Air-gapped systems are otherwise offline networks that are extremely isolated, often used in critical environments like government agencies, weapons systems and nuclear power stations. While RAMBO does not pose a threat for any hacker with access to the internet, it could open the door for insider threats with access to the network to deploy malware through physical media like USB drives or supply chain attacks. RAMBO could allow attackers to seal encoded files, encryption keys, images, keystrokes and biometric information from these systems at a rate of 1,000 bits per second. Researchers conducted tests into these types of attacks over distances of up to 23 feet. A technical paper published on the topic includes several potential mitigations, including RAM jamming, external EM jamming and Faraday enclosures around potentially targeted systems. (Bleeping Computer, SecurityWeek) 

**Commercial spyware makers are still finding ways to bypass government sanctions and, in some cases, have made their tools harder to detect.** A new report from the Atlantic Council found that “Most available evidence suggests that spyware sales are a present reality and likely to continue.” The report specifically highlights increased activity from Intellexa and the NSO Group, two companies known for creating and selling spyware tools that have been targeted over the past few years by international sanctions. These companies, and specifically Intellexa, have found ways to work around sanctions by restructuring their businesses with subsidiaries, partners and other relationships spread across multiple geographic areas. Intellexa is known for creating the Predator spyware, while the NSO Group is infamous for the Pegasus spyware. Both pieces of software often target high-risk individuals, sometimes by governments, such as journalists, politicians and activists. Security researchers also recently found that Intellexa has established new infrastructure in the Democratic Republic of the Congo and Angola, making “it more difficult for researchers and cybersecurity defenders to track the spread of Predator.” (Dark Reading, The Register) 

**Several Western intelligence agencies have formally charged the Russian GRU for carrying out cyber attacks against Ukraine designed to disrupt aid efforts.** Government agencies in the U.S., U.K. and several other countries blamed Unit 29155, which has been linked to past espionage campaigns, with targeting government and civilian agencies and civil society organizations in Western Europe, the EU and NATO after Russia invaded Ukraine in 2022. Intelligence agencies in the Netherlands, Czech Republic, Germany, Estonia, Latvia, Canada and Australia all signed the declaration. They also formally blamed Unit 29155 for the WhisperGate campaign, a coordinated attack on Ukrainian government agencies in January 2022 that seemed to set the stage for a physical ground invasion. The announcement stated that WhisperGate has since been used to “scout and disrupt” aid deliveries to Ukraine. When Talos first reported on WhisperGate in 2022, our researchers stated that “attackers used stolen credentials in the campaign and they likely had access to the victim network for months before the attack, a typical characteristic of sophisticated advanced persistent threat (APT) operations.” (Reuters, BBC) 

**Can’t get enough Talos? **

*   The 2024 Threat Landscape State of Play 
*   Vulnerability in Tencent WeChat custom browser could lead to remote code execution 
*   Watch our new documentary, "The Light We Keep: A Project PowerUp Story" 
*   Vulnerability in Acrobat Reader could lead to remote code execution; Microsoft patches information disclosure issue in Windows API 
*   Four zero-days included in group of 79 vulnerabilities Microsoft discloses, including one with 9.8 severity score 

**Upcoming events where you can find Talos **

**LABScon** **(Sept. 18 - 21)**  

_Scottsdale, Arizona_ 

**VB2024** **(Oct. 2 - 4)** 

_Dublin, Ireland_ 

**MITRE ATT&CKcon 5.0** **(Oct. 22 - 23)** 

_McLean, Virginia and Virtual_

Nicole Hoffman and James Nutland will provide a brief history of Akira ransomware and an overview of the Linux ransomware landscape. Then, morph into action as they take a technical deep dive into the latest Linux variant using the ATT&CK framework to uncover its techniques, tactics and procedures.

**Most prevalent malware files from Talos telemetry over the past week **

**SHA 256:** 47ecaab5cd6b26fe18d9759a9392bce81ba379817c53a3a468fe9060a076f8ca   
**MD5:** 71fea034b422e4a17ebb06022532fdde   
**Typical Filename:** VID001.exe   
**Claimed Product:** N/A   
**Detection Name:** RF.Talos.80 

**SHA 256:** 3a2ea65faefdc64d83dd4c06ef617d6ac683f781c093008c8996277732d9bd66   
**MD5:** 8b84d61bf3ffec822e2daf4a3665308c   
**Typical Filename:** RemComSvc.exe   
**Claimed Product:** N/A   
**Detection Name:** W32.3A2EA65FAE-95.SBX.TG 

**SHA 256:** 35dcf857f0bb2ea75bf4582b67a2a72d7e21d96562b4c8a61b5d598bd2327c2c   
**MD5:** fab8aabfdabe44c9a1ffa779fda207db   
**Typical Filename:** ACenter.exe   
**Claimed Product:** Aranda AGENT   
**Detection Name:** Win.Trojan.Generic::tg.talos  

**SHA 256:** 0e2263d4f239a5c39960ffa6b6b688faa7fc3075e130fe0d4599d5b95ef20647   
**MD5:** bbcf7a68f4164a9f5f5cb2d9f30d9790   
**Typical Filename:** bbcf7a68f4164a9f5f5cb2d9f30d9790.vir   
**Claimed Product:** N/A   
**Detection Name:** Win.Dropper.Scar::1201 

**SHA 256:** 5e537dee6d7478cba56ebbcc7a695cae2609010a897d766ff578a4260c2ac9cf   
**MD5:** 2cfc15cb15acc1ff2b2da65c790d7551   
**Typical Filename:** rcx4d83.tmp   
**Claimed Product:** N/A     
**Detection Name:** Win.Dropper.Pykspa::tpd

We can try to bridge the cybersecurity skills gap, but that doesn’t necessarily mean more jobs for defenders

CVE-2024-38257 is considered “less likely” to be exploited, though it does not require any user interaction or user privileges.

**Vulnerability in Acrobat Reader could lead to remote code execution; Microsoft patches information disclosure issue in Windows API**

Wednesday, September 11, 2024 12:00

Cisco Talos’ Vulnerability Research team discovered two vulnerabilities have been disclosed and fixed over the past few weeks. 

Talos discovered a time-of-check time-of-use vulnerability in Adobe Acrobat Reader, one of the most popular PDF readers currently available, and an information disclosure vulnerability in the Microsoft Windows AllJoyn API. 

For Snort coverage that can detect the exploitation of these vulnerabilities, download the latest rule sets from Snort.org, and our latest Vulnerability Advisories are always posted on Talos Intelligence’s website. 

**Microsoft AllJoyn API information disclosure vulnerability **

   
The AllJoyn API in some versions of the Microsoft Windows operating system contains an information disclosure vulnerability. 

TALOS-2024-1980 (CVE-2024-38257) could allow an adversary to view uninitialized memory on the targeted machine. 

AllJoyn is a DCOM-like framework for creating method calls or sending one-way signals between applications on a distributed bus. It primarily is used in internet-of-things (IoT) devices to tell the devices to perform certain tasks, like turning lights on or off or reading the temperature of a space. 

Microsoft fixed this issue as part of its monthly security update on Tuesday. For more on Patch Tuesday, read Talos’ blog here. 

CVE-2024-38257 is considered “less likely” to be exploited, though it does not require any user interaction or user privileges.   

**Adobe Acrobat Reader annotation object page race condition  **

_Discovered by KPC._ 

Adobe Acrobat Reader, one of the most popular pieces of PDF reading software currently available, contains a time-of-check, use-after-free vulnerability that could trigger memory corruption, and eventually, arbitrary code execution. 

TALOS-2024-2011 (CVE-2024-39420) can be executed if an adversary tricks a targeted user into opening a specially crafted PDF file with malicious JavaScript embedded. This JavaScript could then trigger memory corruption due to a race condition.  

Depending on the memory layout of the process this vulnerability affects, it may be possible to abuse this vulnerability for arbitrary read and write access, which could ultimately be abused to achieve arbitrary code execution.

Source

TALOS