Malicious Koske Persistence via Systemd Service and Shell Profile Hijack (via process_creation)

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1543.002Systemd Service
- T1546.004Unix Shell Configuration Modification
Priv Esc
- T1543.002Systemd Service
- T1546.004Unix Shell Configuration Modification
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects Koske establishing persistence by registering the shellkoske systemd service and by deploying a hijacked shell profile named .bashrc.koske that beacons to command and control. These named artifacts are unique to the Koske campaign and do not appear in legitimate software.

Reporting behind it

Related detections9 linkedT1543.002 — drag to rearrange

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Malicious Koske Persistence via Systemd Service and Shell Profile Hijack (via process_creation)

Pivot detection · T1543.002 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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