Suspicious Creation of PROMPTFLUX Thinking Robot Log in Temp

PremiumReviewedSigma · Medium · v1
Product
windows
Category
file_event
Author
HuntRule
Published
2026-10-11
Updated
2026-10-11

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 creation of the thinking_robot_log.txt artifact in the Temp directory written by the PROMPTFLUX VBScript dropper that queries the Gemini API to regenerate itself. Attackers use this AI assisted metamorphic loader to evade static signatures.

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Suspicious VBScript Code Stored in CurrentVersion Registry Value
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Suspicious Creation of PROMPTFLUX Thinking Robot Log in Temp
Pivot detection · T1059.005 · 9 related

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