1200kmSECURITY RESEARCH

1200KM / sigma-rule

Potential RemoteFXvGPUDisablement.EXE Abuse - PowerShell ScriptBlock — Sigma Rule

Sigma rule cacef8fc-9d3d-41f7-956d-455c6e881bc5. Potential RemoteFXvGPUDisablement.EXE Abuse - PowerShell ScriptBlock — Sigma Rule. Detects PowerShell module creation where the module Contents are set to "function Get-VMRemoteFXPhysicalVideoAdapter". This could be a sign of potential abuse of the "RemoteFXvGPUDisablement.exe" binary which is known to be vulnerable to module load-order hijacking.

Rule metadata and linked tags

testhighwindowsps_scriptattack.stealthattack.t1218

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: high. Source dates: 2023-05-09 / not supplied.

{
  "product": "windows",
  "category": "ps_script",
  "definition": "bade5735-5ab0-4aa7-a642-a11be0e40872"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 653f1056b116014021db055660a91414ec1fa249f1aca176a0fcb3d7bf3ffca6

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Potential RemoteFXvGPUDisablement.EXE Abuse - PowerShell ScriptBlock
id: cacef8fc-9d3d-41f7-956d-455c6e881bc5
related:
    - id: a6fc3c46-23b8-4996-9ea2-573f4c4d88c5 # ProcCreation
      type: similar
    - id: f65e22f9-819e-4f96-9c7b-498364ae7a25 # PS Classic
      type: similar
    - id: 38a7625e-b2cb-485d-b83d-aff137d859f4 # PS Module
      type: similar
status: test
description: Detects PowerShell module creation where the module Contents are set to "function Get-VMRemoteFXPhysicalVideoAdapter". This could be a sign of potential abuse of the "RemoteFXvGPUDisablement.exe" binary which is known to be vulnerable to module load-order hijacking.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218/T1218.md
    - https://github.com/redcanaryco/AtomicTestHarnesses/blob/7e1e4da116801e3d6fcc6bedb207064577e40572/TestHarnesses/T1218_SignedBinaryProxyExecution/InvokeRemoteFXvGPUDisablementCommand.ps1
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-09
tags:
    - attack.stealth
    - attack.t1218
logsource:
    product: windows
    category: ps_script
    definition: bade5735-5ab0-4aa7-a642-a11be0e40872
detection:
    selection:
        ScriptBlockText|startswith: 'function Get-VMRemoteFXPhysicalVideoAdapter {'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

  • Unknown

Source references

Connected ecosystem references

Exact source-tagged techniques

Telemetry review

Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.

Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.