Execute target PowerShell script
runscripthelper.exe surfacecheck \\?\C:\Test\Microsoft\Diagnosis\scripts\test.txt C:\Test
Execute the PowerShell script named test.txt
Bypass constrained language mode and execute Powershell script
C:\Windows\WinSxS\amd64_microsoft-windows-u..ed-telemetry-client_31bf3856ad364e35_10.0.16299.15_none_c2df1bba78111118\Runscripthelper.exe, C:\Windows\WinSxS\amd64_microsoft-windows-u..ed-telemetry-client_31bf3856ad364e35_10.0.16299.192_none_ad4699b571e00c4a\Runscripthelper.exe
Sigma: https://github.com/SigmaHQ/sigma/blob/c04bef2fbbe8beff6c7620d5d7ea6872dbe7acba/rules/windows/process_creation/proc_creation_win_lolbin_runscripthelper.yml, BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules, IOC: Event 4014 - Powershell logging, IOC: Event 400
Matt Graeber (@mattifestation)