huntrule

Windows PowerShell ScriptBlock containing WMImplant tool parameters

Alerts on PowerShell Script Block content containing WMImplant-related command and system-manipulation parameters.

FreeReviewedSigma · High · v2
Product
windows
Category
ps_script
Author
NVISO (SigmaHQ), DRL 1.1
Published
2020-03-26
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Execution

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule flags PowerShell script block content that includes the string "WMImplant" along with multiple WMImplant-style parameter keywords. Such scripted parameter usage can indicate an attacker leveraging a remote administration and execution tool to manipulate system configuration and services. The detection relies on PowerShell Script Block Logging telemetry capturing the script block text.

Reporting behind it

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Suspicious PowerShell Reflective Assembly Load With GZip Decompression (via process_creation)
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Windows PowerShell ScriptBlock containing WMImplant tool parameters
Pivot detection · T1059.001 · 9 related

Changelog

v2
  1. v2
    Candidate ingested via manual entry.2026-07-31
  2. v1
    No changelog recorded for this version.2026-07-30

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