Suspicious TOLLBOOTH IIS Module Files in Windows Temp

PremiumReviewedSigma · Medium · v1
Category
file_event
Author
HuntRule
Published
2026-09-16
Updated
2026-09-16

ATT&CK techniques

Persistence
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  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 file creation under the C:\Windows\Temp\AcpLogs staging directory used by the TOLLBOOTH native IIS module for its configuration and log files. Persistent IIS module artifacts written to a temp directory indicate a covert web server implant.

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Suspicious TOLLBOOTH IIS Module Files in Windows Temp
Pivot detection · T1505.003 · 9 related

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