Malicious Backdoored liblzma XZ Utils Library File via file_event

ATT&CK techniques

Initial Access → Persistence

Recon
Resource Dev
Initial Access
- T1195.001Compromise Software Dependencies and Development Tools
Execution
Persistence
- T1554Compromise Host Software Binary
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the creation of the backdoored liblzma shared object versions 5.6.0 and 5.6.1 associated with the XZ Utils supply chain compromise (CVE-2024-3094). The implanted library hooks the OpenSSH authentication routine to allow remote unauthenticated access. Presence of these specific library versions on a host indicates a compromised software supply chain requiring immediate remediation.

Reporting behind it

Related detections9 linkedT1195.001 — drag to rearrange

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Malicious Backdoored liblzma XZ Utils Library File via file_event

Pivot detection · T1195.001 · 9 related

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