Malicious CloudZ RAT Persistence via schtasks Running regasm.exe

PremiumReviewedSigma · High · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-09-11
Updated
2026-09-11

ATT&CK techniques

Execution → Defense Evasion
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Cred Access

  5. Discovery

  6. Lateral Movement

  7. Collection

  8. C2

  9. Exfiltration

  10. Impact

What it detects

This rule detects a scheduled task created to run onstart as SYSTEM that launches regasm.exe, matching the CloudZ RAT which registers a boot-time task to execute its .NET loader through the regasm LOLBin. Chaining an onstart SYSTEM task to a trusted Microsoft signed binary gives the implant privileged persistence while evading application controls. This combination is a strong indicator of CloudZ deployment.

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Malicious Scheduled Task Named Gentlemen via Schtasks
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Malicious CloudZ RAT Persistence via schtasks Running regasm.exe
Pivot detection · T1053.005 · 9 related

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