Windows PowerShell: AtomicTestHarness Invoke-ATHRemoteFXvGPUDisablementCommand Abuse

Alerts on Windows process command lines invoking AtomicTestHarnesses RemoteFXvGPUDisablement PowerShell execution.

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windows-powershell-atomictestharness-invoke-athremotefxvgpudisablementcommand-ab-a6fc3c46

title: "Windows PowerShell: AtomicTestHarness Invoke-ATHRemoteFXvGPUDisablementCommand Abuse"
id: a71ef257-073e-4719-b46f-fe036cb4b995
related:
  - id: f65e22f9-819e-4f96-9c7b-498364ae7a25
    type: similar
  - id: 38a7625e-b2cb-485d-b83d-aff137d859f4
    type: similar
  - id: cacef8fc-9d3d-41f7-956d-455c6e881bc5
    type: similar
  - id: a6fc3c46-23b8-4996-9ea2-573f4c4d88c5
    type: derived
status: test
description: This rule flags process creation command lines containing the AtomicTestHarnesses function name Invoke-ATHRemoteFXvGPUDisablementCommand (or its truncated variant). The command is associated with abusing RemoteFXvGPUDisablement.exe to execute custom PowerShell via module load-order hijacking. Telemetry relies on Windows process creation events and the exact command-line text used to invoke the harness function.
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
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_powershell_remotefxvgpudisablement_abuse.yml
author: frack113, Huntrule Team
date: 2021-07-13
modified: 2023-05-09
tags:
  - attack.stealth
  - attack.t1218
logsource:
  product: windows
  category: process_creation
detection:
  selection:
    CommandLine|contains:
      - Invoke-ATHRemoteFXvGPUDisablementCommand
      - Invoke-ATHRemoteFXvGPUDisableme
  condition: selection
falsepositives:
  - Unknown
level: high
license: DRL-1.1

What it detects

This rule flags process creation command lines containing the AtomicTestHarnesses function name Invoke-ATHRemoteFXvGPUDisablementCommand (or its truncated variant). The command is associated with abusing RemoteFXvGPUDisablement.exe to execute custom PowerShell via module load-order hijacking. Telemetry relies on Windows process creation events and the exact command-line text used to invoke the harness function.

Known false positives

Unknown

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