Malicious WannaCry Decryptor Launching Tor via process_creation

PremiumReviewedSigma · High · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-09-17
Updated
2026-09-17

ATT&CK techniques

Impact
  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

What it detects

This rule detects the WannaCry ransom note component WanaDecryptor spawning the bundled tor.exe used for anonymous communication with the operators. This activity supports the ransomware payment and command channel over the Tor network. Its presence confirms a WannaCry infection reaching the ransom stage.

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Malicious Remote Encryptor Execution via WMIC Process Call Create (Chaos Ransomware)
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Malicious WannaCry Decryptor Launching Tor via process_creation
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Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.