Egregor Ransomware: Techniques And Activities

This report analyzes the Egregor ransomware campaign: detailing infection mechanics (DLL/COM payload, rundll32 execution with an encrypted command-line argument, process injection, DLL side-loading), anti-analysis and evasion techniques, file encryption behavior (randomized extensions, RECOVER-FILES.txt ransom notes), and data-exfiltration/leak activity against multiple organizations (including claims against Crytek, Ubisoft, Barnes & Noble). The analysis includes technical indicators (numerous file hashes, IP 49.12.104.241 and URLs), observed TTPs mapped to MITRE ATT&CK, and recommendations for prevention and response (backups, patching, user hygiene, and network protections).