huntrule

PowerShell ScriptBlock Function Get-VMRemoteFXPhysicalVideoAdapter Module Creation

Flags PowerShell module content that defines Get-VMRemoteFXPhysicalVideoAdapter in a ScriptBlock, consistent with load-order abuse patterns.

FreeReviewedSigma · High · v2
Product
windows
Category
ps_script
Author
Nasreddine Bencherchali (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2023-05-09
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Defense Evasion

  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 identifies PowerShell activity where a script block begins with the definition of the function Get-VMRemoteFXPhysicalVideoAdapter, typically created as module contents. Such behavior may indicate preparation for abusing a vulnerable binary via module load-order hijacking. The detection relies on PowerShell script block text telemetry that captures the function definition at the start of the script block.

Reporting behind it

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Suspicious RegAsm or RegSvcs Spawned by Script Host (via process_creation)
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Suspicious TALONITE Certutil LOLBIN Decode and Download Abuse (via process_creation)
Suspicious Renamed git Binary gcmd.exe Execution (via process_creation)
PowerShell ScriptBlock Function Get-VMRemoteFXPhysicalVideoAdapter Module Creation
Pivot detection · T1218 · 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.