huntrule

Malicious Renamed Python Interpreter svchostc Executing Script (via process_creation)

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

ATT&CK techniques

Execution → Defense Evasion

  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 detects execution of svchostc.exe, a renamed Python interpreter used by FIN7 to run its svchostc.py loader while impersonating the legitimate Windows svchost service host. The genuine binary is svchost.exe, so the trailing character is a masquerade meant to blend into process listings. This executes the FIN7 payload staged from a spoofed brand MSIX.

Reporting behind it

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Suspicious PowerShell Executing Payload From Roaming AppData via Command Line (via process_creation)
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Malicious Renamed Python Interpreter svchostc Executing Script (via process_creation)
Pivot detection · T1059.001 · 9 related

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