Malicious Keyhunter Worker Systemd Unit File Creation

PremiumReviewedSigma · High · v1
Product
linux
Category
file_event
Author
HuntRule
Published
2026-07-17
Updated
2026-08-28

ATT&CK techniques

Persistence → Priv Esc
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Defense Evasion

  6. Cred Access

  7. Discovery

  8. Lateral Movement

  9. Collection

  10. C2

  11. Exfiltration

  12. Impact

What it detects

This rule detects creation of the keyhunter-worker systemd unit file dropped by the NATS-as-C2 credential harvesting campaign. The unit establishes persistence for a worker that connects to an attacker NATS broker and exfiltrates cloud and AI API keys. A unit file with this name is a strong indicator of compromise.

Related detections9 linkedT1543.002 — drag to rearrange
Malicious Koske Persistence via Systemd Service and Shell Profile Hijack (via process_creation)
Suspicious Linux CoinMiner Watchdog Staging in Shared Memory (via process_creation)
Suspicious systemd Service Persistence Creation (via process_creation)
Masquerading Systemd Service Masquerade via Systemctl Reenable of rsyslogd (via process_creation)
Suspicious Systemd Service Masquerading as Sysmon (via file_event)
APT28 httd Implant Persistence via systemd linux.service from Boot Directory (via process_creation)
Masquerading Execution of Binary from Var Log Directory (via process_creation)
Suspicious File Immutability Set via chattr for Anti-Removal on Linux
Suspicious systemd User Service Persistence miasma-monitor (via file_event)
Malicious Keyhunter Worker Systemd Unit File 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.