Researchers detailed how LetMeowIn, a tool designed to harvest credentials from the LSASS process on Microsoft Windows systems, employs advanced evasion techniques like obfuscation and indirect syscalls. By manipulating memory dumps and using techniques to prevent ETW data gathering, LetMeowIn can bypass traditional endpoint security products. The tool also hijacks LSASS process handles to extract credentials, uses anti-analysis methods, and corrupts dump file signatures to evade detection
Detection opportunities include monitoring process creation, image loading for dbghelp.dll, querying event logs, and auditing handle manipulation and registry access. To combat such threats, defenders are advised to set up enhanced monitoring, handle manipulation auditing, and memory dump creation detection, emphasizing the importance of understanding attacker techniques in the cybersecurity landscape. https://cybersecuritynews.com/researchers-detailed-letmeowin-credentials/