1. How Memory Forensics Revealed Exploitation of Ivanti Connect Secure VPN Zero-Day Vulnerabilities

    In a recent series of blog posts related to two zero-day vulnerabilities in Ivanti Connect Secure VPN, Volexity shared details of active in-the-wild exploitation; provided an update on how exploitation had gone worldwide; and reported observations of how malware and modifications to the built-in Integrity Checker Tool were used to evade detection. A critical piece of Volexity’s initial investigation involved collecting and analyzing a memory sample. As noted in the first blog post of the three-part series (emphasis added): “…Volexity analyzed one of the collected memory samples and uncovered the exploit chain used by the attacker. Volexity discovered two different zero-day exploits which were being chained together to achieve unauthenticated remote code execution (RCE). Through forensic analysis of the memory sample, Volexity was able to recreate two proof-of-concept exploits that allowed full unauthenticated command execution on the ICS VPN appliance.” Collect & Analyze Memory ASAP Volexity regularly prioritizes memory forensics […]

  2. Using Memory Analysis to Detect EDR-Nullifying Malware

    In the ever-changing cybersecurity landscape, threat actors are forced to evolve and continually modify the tactics, techniques, and procedures (TTPs) they employ to launch and sustain attacks successfully. They are continually modifying their malware and command-execution methods to evade detection. The attackers in these cases are attempting to get a step ahead of security software at the most basic level. However, some techniques take a different approach, aiming further up the stack and directly taking on security software. The most brazen methods involve leveraging various tools that directly terminate or shutdown security software. If successful, this method is effective at giving an attacker free reign on a system. However, it comes at the potential cost of alerting users or administrators that the software unexpectedly stopped reporting or was shut off. What about a technique that potentially flies a bit more under the radar? In November 2022, Trend Micro published a […]