Velvet Ant PAM and OpenSSH Binary Tampering - Auth Stack File Integrity
This rule detects unauthorized or suspicious write operations to Linux Pluggable Authentication Modules (PAM) configuration files or shared libraries. PAM controls authentication for various system services; unauthorized modification of these files is a common technique used by attackers to establish backdoors, bypass authentication mechanisms, or harvest credentials. The rule excludes common system package management utilities to reduce noise.
Cortex XDR
