Velvet Ant PAM Module Replacement — pam_unix.so Tampered on Auth Server

Ibrahim Saud@tektrix

•updated Jun 30, 2026•0•0•2

Detects the modification or creation of Pluggable Authentication Module (PAM) files or shared libraries in Linux environments. This technique is often used to establish persistence or intercept authentication credentials by replacing legitimate modules like pam_unix.so with malicious counterparts.