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.
Sigma rule (View on GitHub)
1title: Potential RemoteFXvGPUDisablement.EXE Abuse - PowerShell ScriptBlock
2id: cacef8fc-9d3d-41f7-956d-455c6e881bc5
3related:
4 - id: a6fc3c46-23b8-4996-9ea2-573f4c4d88c5 # ProcCreation
5 type: similar
6 - id: f65e22f9-819e-4f96-9c7b-498364ae7a25 # PS Classic
7 type: similar
8 - id: 38a7625e-b2cb-485d-b83d-aff137d859f4 # PS Module
9 type: similar
10status: test
11description: 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.
12references:
13 - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218/T1218.md
14 - https://github.com/redcanaryco/AtomicTestHarnesses/blob/7e1e4da116801e3d6fcc6bedb207064577e40572/TestHarnesses/T1218_SignedBinaryProxyExecution/InvokeRemoteFXvGPUDisablementCommand.ps1
15author: Nasreddine Bencherchali (Nextron Systems)
16date: 2023/05/09
17tags:
18 - attack.defense_evasion
19 - attack.t1218
20logsource:
21 product: windows
22 category: ps_script
23 definition: bade5735-5ab0-4aa7-a642-a11be0e40872
24detection:
25 selection:
26 ScriptBlockText|startswith: 'function Get-VMRemoteFXPhysicalVideoAdapter {'
27 condition: selection
28falsepositives:
29 - Unknown
30level: high
References
-
Small and highly portable detection tests based on MITRE's ATT&CK. - redcanaryco/atomic-red-team
Read More -
Public Repo for Atomic Test Harness. Contribute to redcanaryco/AtomicTestHarnesses development by creating an account on GitHub.
Read More
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