huntrule

BabyShark HackTool Proxy C2 URL Pattern via momyshark?key=

Alerts on proxy URIs containing the BabyShark agent default "momyshark?key=" query pattern.

FreeReviewedSigma · Critical · v2
Category
proxy
Author
Florian Roth (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2021-06-09
Updated
2026-07-31
AnalysisDetection

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. C2

  13. Exfiltration

  14. Impact

What it detects

This rule identifies proxy requests whose URI contains the BabyShark C2 default URL pattern: momyshark?key=. Attackers using this framework may rely on predictable request paths to establish command-and-control communications. Detection relies on proxy telemetry that includes the full request URI so the pattern match can be applied.

Reporting behind it

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BabyShark HackTool Proxy C2 URL Pattern via momyshark?key=
Pivot detection · T1071.001 · 9 related

Changelog

v2
  1. v2
    Candidate ingested via manual entry.2026-07-31
  2. v1
    No changelog recorded for this version.2026-07-30

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