Suspicious Python Execution from Hidden Downloads Python Folder

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-09-21
Updated
2026-09-21

ATT&CK techniques

Execution
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Persistence

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Discovery

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects a Python interpreter running scripts out of a hidden Downloads Python directory used by the Quartet loader. The campaign staged its interpreter and payloads in concealed Downloads subfolders to persist and execute the RAT quartet. Python launched from this hidden staging path is not normal developer activity.

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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.