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Plague Linux Backdoor

Aug 15, 2025 11:28:22 AM / by The Hivemind posted in Threat Hunting, Threat Bulletin, PAM malware, stealthy authentication bypass, Linux backdoor, XOR obfuscation, SSH persistence, Linux security

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Verticals Targeted: Not specified
Regions Targeted: Not specified
Related Families: None

Executive Summary

Researchers have uncovered Plague, a previously undetected Linux backdoor masquerading as a malicious Pluggable Authentication Module (PAM) to enable persistent SSH access and authentication bypass. This implant's layered obfuscation and environment tampering allow it to evade detection, persisting across system updates with minimal forensic traces.

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