#cisco

By Jung soo An, Asheer Malhotra and Vitor Ventura. Cisco Talos has been tracking a new campaign operated by the Lazarus APT group, attributed to North Korea by the United States government. This campaign involved the exploitation of vulnerabilities in VMWare Horizon to gain an initial foothold into targeted organizations. Targeted organizations include energy providers from around the world, including those headquartered in the United States, Canada and Japan. The campaign is meant to infiltrate organizations around the world for establishing long term access and subsequently exfiltrating data of interest to the adversary's nation-state. Talos has discovered the use of two known families of malware in these intrusions — VSingle and YamaBot. Talos has also discovered the use of a recently disclosed implant we're calling "MagicRAT" in this campaign. Introduction Cisco Talos observed North Korean state-sponsored APT Lazarus Group conducting malicious activity between February...

Cisco on Wednesday rolled out patches to address three security flaws affecting its products, including a high-severity weakness disclosed in NVIDIA Data Plane Development Kit (MLNX_DPDK) late last month. Tracked as CVE-2022-28199 (CVSS score: 8.6), the vulnerability stems from a lack of proper error handling in DPDK's network stack, enabling a remote adversary to trigger a denial-of-service (

A SaaS-specific security solution can help security teams make sure apps and usage are both secure, reducing the chances of a breach.

By Azim Khodjibaev, Colin Grady, Paul Eubanks. Since Aug. 20, 2022, Cisco Talos has been monitoring suspected distributed denial-of-service (DDoS) attacks resulting in intermittent downtime and outages affecting several ransomware-as-a-service (RaaS) data leak sites. While the source and origin of this activity remain unknown, this appears to be a concentrated effort against RaaS leak sites to disrupt their efforts to announce and post new victim information. Actors' responses have varied, with LockBit and ALPHV implementing new measures to counteract DDoS attacks against their sites while other groups like Quantum have simply resorted to redirecting web traffic elsewhere. LockBit also appears to have co-opted this technique by advertising that they are now adding DDoS as an extortion tactic in addition to encrypting and leaking data. RaaS leak sites experience intermittent outages In late August, Talos became aware of several prominent ransomware operations, such as ALPHV (also ref...

The prolific North Korean nation-state actor known as the Lazarus Group has been linked to a new remote access trojan called MagicRAT. The previously unknown piece of malware is said to have been deployed in victim networks that had been initially breached via successful exploitation of internet-facing VMware Horizon servers, Cisco Talos said in a report shared with The Hacker News. "While being

By Jung soo An, Asheer Malhotra and Vitor Ventura. Cisco Talos has discovered a new remote access trojan (RAT) we're calling "MagicRAT," developed and operated by the Lazarus APT group, which the U.S. government believes is a North Korean state-sponsored actor. Lazarus deployed MagicRAT after the successful exploitation of vulnerabilities in VMWare Horizon platforms. We've also found links between MagicRAT and another RAT known as "TigerRAT," disclosed and attributed to Lazarus by the Korean Internet & Security Agency (KISA) recently. TigerRAT has evolved over the past year to include new functionalities that we illustrate in this blog. Executive Summary Cisco Talos has discovered a new remote access trojan (RAT), which we are calling "MagicRAT," that we are attributing with moderate to high confidence to the Lazarus threat actor, a state-sponsored APT attributed to North Korea by the U.S. Cyber Security & Infrastructure Agency (CISA). This new RAT was found on victims ...

What under-the-hood details of newly discovered attack control panel tells us about how the Evil Corp threat group manages its ServHelper backdoor malware campaigns.

The India native has transitioned from a reverse-engineer hobbyist to a public speaker in just a few years   By Jon Munshaw.  Ninety percent of Asheer Malhotra’s work will never see the light of day. But it’s that 10 percent that keeps him motivated to keep looking for something new.  The Talos Outreach researcher spends most of his days looking into potential new threats. Many times, that leads to dead ends of threats that have already been discovered and blocked or don’t have any additional threads to pull on.  But eventually, the “lightbulb goes off,” as he puts it, which indicates something is a new threat the wider public needs to know about. During his time at Talos, Malhotra has spent much of his time looking into cyber attacks and state-sponsored threat actors in Asia, like the Transparent Tribe group he’s written about several times.  “At some point, I say ‘Hey, I don’t think I’ve seen this before.’ I start analyzing public disclosures, and slowly start gaining confidence and...

This Metasploit module exploits an authenticated command injection vulnerability affecting Cisco ASA-X with FirePOWER Services. This exploit is executed through the ASA's ASDM web server and lands in the FirePower Services SFR module's Linux virtual machine as the root user. Access to the virtual machine allows the attacker to pivot to the inside network, and access the outside network. Also, the SFR virtual machine is running snort on the traffic flowing through the ASA, so the attacker should have access to this diverted traffic as well. This module requires ASDM credentials in order to traverse the ASDM interface. A similar attack can be performed via Cisco CLI (over SSH), although that isn't implemented here. Finally, it's worth noting that this attack bypasses the affects of the lockdown-sensor command (e.g. the virtual machine's bash shell shouldn't be available but this attack makes it available). Cisco assigned this issue CVE-2022-20828. The issue affects all Cisco ASA that sup...

wolfSSL through 5.0.0 allows an attacker to cause a denial of service and infinite loop in the client component by sending crafted traffic from a Machine-in-the-Middle (MITM) position. The root cause is that the client module accepts TLS messages that normally are only sent to TLS servers.