Suspicious Stealth Soldier C2 Request URI (via proxy)

PremiumReviewedSigma · Medium · v1
Category
proxy
Author
HuntRule
Published
2026-07-21
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 HTTP POST requests to the Server Request endpoint used by the Stealth Soldier backdoor for command-and-control. The fixed URI path combined with the POST method is a structured C2 pattern that helps surface backdoor beaconing in web proxy telemetry.

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GateDoor Command-and-Control via gateway REST Endpoints (via proxy)
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Suspicious Stealth Soldier C2 Request URI (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.