Suspicious Scheduled Task Running PowerShell Every Minute (via process_creation)

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

ATT&CK techniques

Execution → Priv Esc
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Defense Evasion

  5. Cred Access

  6. Discovery

  7. Lateral Movement

  8. Collection

  9. C2

  10. Exfiltration

  11. Impact

What it detects

This rule detects creation of a scheduled task with a minute-based recurrence whose action launches PowerShell, the persistence and beaconing mechanism used by the TinyNote backdoor of Camaro Dragon. High-frequency scheduled tasks driving PowerShell are unusual for legitimate software and typically indicate implant callbacks.

Related detections9 linkedT1053.005 — drag to rearrange
Suspicious Scheduled Task Launching rundll32 DLL via Ransomware
Suspicious Scheduled Task Creation in Public Writable Directory via schtasks (via process_creation)
Suspicious Scheduled Task Executing Payload from AppData
Scheduled Task Creating Per-Minute Hidden PowerShell Execution
Windows Process Creation: schtasks.exe Creating Scheduled Task Launching Registry-Stored PowerShell Payload
Windows Task Scheduler persistence using svchost-launched PowerShell with hidden/Bypass flags
Windows schtasks.exe Create Executes File from AppData\Local
Windows schtasks Creates Registry-Backed Base64 PowerShell Payload via Encoded Command
Windows ChromeLoader Execution via Scheduled Task and Hidden PowerShell Launch
Suspicious Scheduled Task Running PowerShell Every Minute (via process_creation)
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.