sigmahighHunting

Potential RemoteFXvGPUDisablement.EXE Abuse - PowerShell ScriptBlock

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.

MITRE ATT&CK

T1218

defense-evasion

Detection Query

selection:
  ScriptBlockText|startswith: function Get-VMRemoteFXPhysicalVideoAdapter {
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-05-09

Data Sources

windowsps_script

Platforms

windows

References

Tags

attack.defense-evasionattack.t1218

Raw Content

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.defense-evasion
    - 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