Malicious Stealth Soldier C2 User-Agent (via proxy)

PremiumReviewedSigma · High · v1
Category
proxy
Author
HuntRule
Published
2026-08-04
Updated
2026-08-28

ATT&CK techniques

C2
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. Exfiltration

  13. Impact

What it detects

This rule detects outbound web requests carrying the hardcoded Stealth Soldier user-agent string used by the Stealth Soldier backdoor in espionage attacks across North Africa. This static, tool-specific user-agent is a distinctive command-and-control fingerprint that legitimate clients do not present.

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Malicious Stealth Soldier C2 User-Agent (via proxy)
Pivot detection · T1071.001 · 9 related

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