SigmaHQ Detections
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Detects PowerShell downgrade attack by comparing the host versions with the actually used engine version 2.0
Detects PowerShell called from an executable by the version mismatch method
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.
Detects a renamed Powershell execution, which is a common technique used to circumvent security controls and bypass detection logic that's dependent on process names and process paths.
Detects keywords that could indicate clearing PowerShell history
Detects Obfuscated use of Clip.exe to execute PowerShell
Detects all variations of obfuscated powershell IEX invocation code generated by Invoke-Obfuscation framework from the code block cited in the reference section below
Detects Obfuscated use of stdin to execute PowerShell
Detects Obfuscated use of Environment Variables to execute PowerShell
Detects Obfuscated Powershell via COMPRESS OBFUSCATION
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