Headline
Vulnerability Exploits, Not Phishing, Are the Top Cyberattack Vector for Initial Compromise
A slew of Microsoft Exchange vulnerabilities (including ProxyLogon) fueled a surge in attacks targeting software flaws in 2021, but the trend has continued this year.
Breaches involving phishing and credential compromise have received a lot of attention in recent years because of how frequently threat actors have employed the tactics in executing both targeted and opportunistic attacks. But that doesn’t mean that enterprise organizations can afford to lessen their focus on vulnerability patching one bit.
A report from Kaspersky this week identified more initial intrusions last year resulting from exploitation of vulnerabilities in Internet-facing applications than breaches involving malicious emails and compromised accounts combined. And data the company has collected through the second quarter of 2022 suggests the same trend might be playing out this year as well.
Kaspersky’s analysis of its 2021 incident-response data showed that breaches involving vulnerability exploits surged from 31.5% of all incidents in 2020 to 53.6% in 2021. Over the same period, attacks associated with the use of compromised accounts to gain initial access declined from 31.6% in 2020 to 17.9% last year. Initial intrusions resulting from phishing emails decreased from 23.7% to 14.3% during the same period.
Exchange Server Flaws Fuel the Exploit Frenzy
Kaspersky attributed the surge in exploit activity last year as likely tied to the multiple critical Exchange Server vulnerabilities that Microsoft disclosed, including a set of four zero-days in March 2021 known as the ProxyLogon flaws (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065). When chained together they allowed attackers to gain complete remote control over on-premises Exchange Servers.
Attackers — which included organized criminal gangs and state-sponsored groups from China — quickly exploited tens of thousands of vulnerable Exchange Server systems and dropped Web shells on them before Microsoft could issue a patch for the flaws. The vulnerabilities evoked considerable concern because of their ubiquity and severity. They even prompted the US Department of Justice to authorize the FBI to take the unprecedented step of proactively removing ProxyLogon Web shells from servers belonging to hundreds of organizations — in most cases, without any notification.
Also driving the exploit activity in 2021 was another trio of Exchange Server vulnerabilities collectively labeled ProxyShell (CVE-2021-31207, CVE-2021-34473, CVE-2021-34523) that attackers used extensively to drop ransomware and in business email compromise (BEC) attacks.
More than a year later, the ProxyLogon and ProxyShell vulnerabilities continue to be targets of heavy exploit activity, says Konstantin Sapronov, head of Kaspersky’s Global Emergency Response Team. One of the most severe of these flaws (CVE-2021-26855) has also been the most targeted. Kaspersky observed the vulnerability — part of the ProxyLogon set — being exploited in 22.7% of all incidents involving vulnerability exploits that it responded to in 2021, and the flaw continues to be a favorite among attackers this year as well, according to Sapronov.
Same Exploitation Trend Likely Playing Out in 2022
Even though several serious vulnerabilities have surfaced this year — including the ubiquitous Apache Log4j vulnerability (CVE-2021-44228) — the most exploited vulnerabilities of 2021 remain very prevalent in 2022 as well, Sapronov says, even beyond the Exchange server bugs. For instance, Kaspersky identified a flaw in Microsoft’s MSHTML browser engine (CVE-2021-40444, patched last September) as the most heavily attacked vulnerability in the second quarter of 2022.
“Vulnerabilities in popular software such as MS Exchange Server and library Log4j have resulted in a huge number of attacks,” Sapronov notes. “Our advice to enterprise customers is to pay close attention to patch management issues.”
Time to Prioritize Patching
Others have noted a similar spike in vulnerability exploit activity. In April, researchers from Palo Alto Networks’ Unit 42 threat research team noted how 31%, or nearly one in three incidents, they had analyzed up to that point in 2022 involved vulnerability exploits. In more than half (55%) of those, threat actors had targeted ProxyShell.
Palo Alto researchers also found threat actors typically scanning for systems with a just-disclosed flaw literally minutes after the CVE is announced. In one instance, they observed an authentication bypass flaw in an F5 network appliance (CVE-2022-1388) being targeted 2,552 times in the first 10 hours after vulnerability disclosure.
Post-Exploitation Activity is Tough to Spot
Kaspersky’s analysis of its incident-response data showed that in nearly 63% of cases, attackers managed to stay unnoticed in a network for more than a month after gaining initial entry. In many cases, this was because the attackers used legitimate tools and frameworks such as PowerShell, Mimikatz, and PsExec to collect data, escalate privileges, and execute commands.
When someone did quickly notice a breach, it was typically because the attackers had created obvious damage, such as during a ransomware attack. “It’s easy to detect a ransomware attack when your data is encrypted, as services are unavailable, and you have a ransom note on your monitor,” Sapronov says.
But when the target is a company’s data, attackers need more time to roam around the victim’s network to collect necessary information. In such cases, attackers act more stealthily and cautiously, which makes these kinds of attacks harder to detect. “To detect such cases, we suggest employing a security tool stack with extended detection and response (EDR)-like telemetry and implement rules for detection of pervasive tools used by adversaries,” he says.
Mike Parkin, senior technical engineer at Vulcan Cyber, says the real takeaway for enterprise organizations is that attackers will take any opportunity they can to breach a network.
“With a range of exploitable vulnerabilities, it’s not a surprise to see an uptick,” he says. Whether the numbers are higher for vulnerabilities over socially engineered credential attacks, is hard to say, he notes.
“But the bottom line is threat actors will use the exploits that work. If there’s a new remote code exploit on some Windows service, they’ll flock to it and breach as many systems as they can before the patches come out or firewall rules get deployed,” he says.
The real challenge is the long-tail vulnerabilities: The ones that are older, like ProxyLogon, with vulnerable systems that have been missed or are ignored, Parkin says, adding that patching must be a priority.
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Categories: Exploits and vulnerabilities Categories: News Tags: Zoho ManageEngine Tags: CVE-2021-40539 Tags: Log4Shell Tags: CVE-2021-44228 Tags: CVE-2021-13379 Tags: ProxyShell Tags: CVE-2021-34473 Tags: CVE-2021-31207 Tags: CVE-2021-34523 Tags: CVE-2021-26084 Tags: Atlassian Tags: CVE-2022-22954 Tags: CVE-2022-22960 Tags: CVE-2022-26134 Tags: CVE-2022-1388 Tags: CVE-2022-30190 Tags: Follina What can the routinely exploited vulnerabilities of 2022 tell us, and what do we think will make it on to next year's list? (Read more...) The post 2022's most routinely exploited vulnerabilities—history repeats appeared first on Malwarebytes Labs.
Microsoft Word documents exploiting known remote code execution flaws are being used as phishing lures to drop malware called LokiBot on compromised systems. "LokiBot, also known as Loki PWS, has been a well-known information-stealing Trojan active since 2015," Fortinet FortiGuard Labs researcher Cara Lin said. "It primarily targets Windows systems and aims to gather sensitive information from
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Hello everyone! This episode will be about the new hot twenty vulnerabilities from CISA, NSA and FBI, Joint cybersecurity advisory (CSA) AA22-279A, and how I analyzed these vulnerabilities using my open source project Vulristics. Alternative video link (for Russia): https://vk.com/video-149273431_456239105 Americans can’t just release a list of “20 vulnerabilities most commonly exploited in attacks on […]
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By Deeba Ahmed Worok is primarily targeting organizations in banking, telecommunication, marine, military, energy, public sectors, and government in its current campaign. This is a post from HackRead.com Read the original post: Worok Hackers Targeting Orgs, Govts in Asia, Middle East and Africa
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A relative newcomer to the ransomware scene, the BlackCat group quickly gained notoriety and may be associated with other APT groups like Conti and DarkSide.
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The operators of the emerging cross-platform ransomware BianLian increased their command and control infrastructure this month, indicating an acceleration in their operational pace.
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Trustwave report also finds 2022 is set to surpass 2021 for volume of critical CVEs
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Hello everyone! This is the second episode of Vulnerability Management news and publications. In fact, this is a collection of my posts from the avleonovcom and avleonovrus telegram channels. Therefore, if you want to read them earlier, subscribe to these channels. Alternative video link (for Russia): https://vk.com/video-149273431_456239097 What’s in this episode: Microsoft released a propaganda […]
Hello everyone! This is the second episode of Vulnerability Management news and publications. In fact, this is a collection of my posts from the avleonovcom and avleonovrus telegram channels. Therefore, if you want to read them earlier, subscribe to these channels. Alternative video link (for Russia): https://vk.com/video-149273431_456239097 What’s in this episode: Microsoft released a propaganda […]
Hello everyone! This is the second episode of Vulnerability Management news and publications. In fact, this is a collection of my posts from the avleonovcom and avleonovrus telegram channels. Therefore, if you want to read them earlier, subscribe to these channels. Alternative video link (for Russia): https://vk.com/video-149273431_456239097 What’s in this episode: Microsoft released a propaganda […]
Hello everyone! This is the second episode of Vulnerability Management news and publications. In fact, this is a collection of my posts from the avleonovcom and avleonovrus telegram channels. Therefore, if you want to read them earlier, subscribe to these channels. Alternative video link (for Russia): https://vk.com/video-149273431_456239097 What’s in this episode: Microsoft released a propaganda […]
Hello everyone! This is the second episode of Vulnerability Management news and publications. In fact, this is a collection of my posts from the avleonovcom and avleonovrus telegram channels. Therefore, if you want to read them earlier, subscribe to these channels. Alternative video link (for Russia): https://vk.com/video-149273431_456239097 What’s in this episode: Microsoft released a propaganda […]
Hello everyone! This is the second episode of Vulnerability Management news and publications. In fact, this is a collection of my posts from the avleonovcom and avleonovrus telegram channels. Therefore, if you want to read them earlier, subscribe to these channels. Alternative video link (for Russia): https://vk.com/video-149273431_456239097 What’s in this episode: Microsoft released a propaganda […]
Hello everyone! This is the second episode of Vulnerability Management news and publications. In fact, this is a collection of my posts from the avleonovcom and avleonovrus telegram channels. Therefore, if you want to read them earlier, subscribe to these channels. Alternative video link (for Russia): https://vk.com/video-149273431_456239097 What’s in this episode: Microsoft released a propaganda […]
Open source utility exposes payloads without running vulnerable Java code
MobileIron Core is affected by the Log4Shell vulnerability whereby a JNDI string sent to the server will cause it to connect to the attacker and deserialize a malicious Java object. This results in OS command execution in the context of the tomcat user. This Metasploit module will start an LDAP server that the target will need to connect to.
While attackers continue to rely on older, unpatched vulnerabilities, many are jumping on new vulnerabilities as soon as they are disclosed.
While attackers continue to rely on older, unpatched vulnerabilities, many are jumping on new vulnerabilities as soon as they are disclosed.
While attackers continue to rely on older, unpatched vulnerabilities, many are jumping on new vulnerabilities as soon as they are disclosed.
While attackers continue to rely on older, unpatched vulnerabilities, many are jumping on new vulnerabilities as soon as they are disclosed.
While attackers continue to rely on older, unpatched vulnerabilities, many are jumping on new vulnerabilities as soon as they are disclosed.
While attackers continue to rely on older, unpatched vulnerabilities, many are jumping on new vulnerabilities as soon as they are disclosed.
While attackers continue to rely on older, unpatched vulnerabilities, many are jumping on new vulnerabilities as soon as they are disclosed.
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The Microsoft 365 Defender Research Team has warned that attackers are increasingly leveraging Internet Information Services (IIS) extensions as covert backdoors into servers. The post IIS extensions are on the rise as backdoors to servers appeared first on Malwarebytes Labs.
The Microsoft 365 Defender Research Team has warned that attackers are increasingly leveraging Internet Information Services (IIS) extensions as covert backdoors into servers. The post IIS extensions are on the rise as backdoors to servers appeared first on Malwarebytes Labs.
The Microsoft 365 Defender Research Team has warned that attackers are increasingly leveraging Internet Information Services (IIS) extensions as covert backdoors into servers. The post IIS extensions are on the rise as backdoors to servers appeared first on Malwarebytes Labs.
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Commodity malware usage surpasses ransomware by narrow margin By Caitlin Huey. For the first time in more than a year, ransomware was not the top threat Cisco Talos Incident Response (CTIR) responded to this quarter, as commodity malware surpassed ransomware by a narrow margin. This is likely due to several factors, including the closure of several ransomware groups, whether it be of their own volition or the actions of global law enforcement agencies and governments. Commodity malware was the top observed threat this quarter, a notable development given the general decrease in observations of attacks leveraging commodity trojans in CTIR engagements since 2020. These developments coincide with a general resurgence of certain email-based trojans in recent months, as law enforcement and technology companies have continued to attempt to disrupt and affect email-based malware threats like Emotet and Trickbot. This quarter featured malware such as the Remcos remote access trojan ...
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Hello everyone! In this episode, I want to talk about the Positive Hack Days 11 conference, which took place on May 18 and 19 in Moscow. As usual, I want to express my personal opinion about this event. Alternative video link (for Russia): https://vk.com/video-149273431_456239091 As I did last year, I want to start talking about this […]
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By Jon Munshaw. Welcome to this week’s edition of the Threat Source newsletter. I will openly admit that I still own a “classic” iPod — the giant brick that weighed down my skinny jeans in high school and did nothing except play music. There are dozens of hours of music on there that I... [[ This is only the beginning! Please visit the blog for the complete entry ]]
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By Deeba Ahmed Cobalt Mirage is an Irani threat group believed to be linked to the Iranian Cobalt Illusion threat group,… This is a post from HackRead.com Read the original post: Iran’s COBALT MIRAGE Threat Group Behind Ransomware Attacks in US
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The bug has a severe rating of 9.8, public exploits are released.
F5 BIG-IP remote code execution proof of concept exploit that leverages the vulnerability identified in CVE-2022-1388.
Users should patch immediately
On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior to 13.1.5, and all 12.1.x and 11.6.x versions, undisclosed requests may bypass iControl REST authentication. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated
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Microsoft MSHTML Remote Code Execution Vulnerability
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This guidance will help customers address threats taking advantage of the recently disclosed Microsoft Exchange Server on-premises vulnerabilities CVE-2021-26855, CVE-2021-26858, CVE-2021-26857, and CVE-2021-27065, which are being exploited. We strongly urge customers to immediately update systems. Failing to address these vulnerabilities can result in compromise of your on-premises Exchange Server and, potentially, other parts of your internal network.
We have been actively working with customers through our customer support teams, third-party hosters, and partner network to help them secure their environments and respond to associated threats from the recent Exchange Server on-premises attacks. Based on these engagements we realized that there was a need for a simple, easy to use, automated solution that would meet the needs of customers using both current and out-of-support versions of on-premises Exchange Server.
Update March 15, 2021: If you have not yet patched, and have not applied the mitigations referenced below, a one-click tool, the Exchange On-premises Mitigation Tool is now our recommended path to mitigate until you can patch. Microsoft previously blogged our strong recommendation that customers upgrade their on-premises Exchange environments to the latest supported version.
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27078.
On March 2nd, we released several security updates for Microsoft Exchange Server to address vulnerabilities that are being used in ongoing attacks. Due to the critical nature of these vulnerabilities, we recommend that customers protect their organizations by applying the patches immediately to affected systems. The vulnerabilities affect Exchange Server versions 2013, 2016, and 2019, while Exchange Server 2010 is also being updated for defense-in-depth purposes.
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