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    Powershell Shellcode Execution Via Callwindowproc

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    GlassDiceBearhttps://www.dicebear.comhttps://creativecommons.org/publicdomain/zero/1.0/„Glass” (https://www.dicebear.com) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)
    Tim Peck@timpeck
    •updated Aug 27, 2025•3•2•27

    Detects PowerShell preparing to execute shellcode using the CallWindowProc API. This technique is used to bypass EDRs by executing code without creating a new thread, which is a commonly monitored API call.

    YARA-L

    Tags

    T1055 - Process InjectionT1059.001 - PowerShellTA0005 - Defense EvasionTA0004 - Privilege EscalationTA0002 - ExecutionProcess CreationScript ExecutionPowershell Script ExecutionWindowsWindows Eventlog PowershellWindows SysmonWindows Eventlog SecurityTTPPOWERSHELLINJECTIONSHELLCODE

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