The Lazarus Group is back with an upgraded variant of their FudModule rootkit, this time enabled by a zero-day admin-to-kernel vulnerability for CVE-2024-21338. Read this blog for a detailed analysis of this rootkit variant and learn more about several new techniques, including a handle table entry...
Introduction Rootkits are dangerous pieces of malware. Once in place, they are usually really hard to detect. Their code is typically more challenging to write than other malware, so developers resort to code reuse from open source projects. As rootkits are very interesting to analyze, we are...
The Windows kernel allows loading drivers signed with revoked certificates. The DirtyMoe driver is also signed with revoked certificates that are moreover widely abused in other malware. Motivated by these facts, this article analyzes the mechanism of how Windows manages certificate revocation...
The DirtyMoe malware is a complex malicious backdoor employing various self-protection and anti-forensics mechanisms. One of the more significant safeguards is a rootkit. The next article of the DirtyMoe series explains rootkit functionality in detail.