Obfuscated Encoded PowerShell Payload Deployed - PowerShell (via powershell)

PremiumReviewedSigma · High · v1
Product
windows
Service
powershell
Author
HuntRule
Published
2026-08-31
Updated
2026-08-31

ATT&CK techniques

Execution → Defense Evasion
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Persistence

  5. Priv Esc

  6. Cred Access

  7. Discovery

  8. Lateral Movement

  9. Collection

  10. C2

  11. Exfiltration

  12. Impact

What it detects

This rule detects deployed a service pointing to a hidden and encoded PowerShell payload.

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Suspicious Hidden Encoded PowerShell Launching Node.js Runtime
Windows PowerShell Base64-Encoded WMI Class Invocation
PowerShell script alias obfuscation via -Value (-join(...))
Obfuscated Encoded PowerShell Payload Deployed - PowerShell (via powershell)
Pivot detection · T1027 · 9 related

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