Detectionhightest

Potentially Suspicious Child Process Of Regsvr32

Detects potentially suspicious child processes of "regsvr32.exe".

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elhoim, Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)Created Thu May 05Updated Fri May 266f0947a4-1c5e-4e0d-8ac7-53159b8f23cawindows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        ParentImage|endswith: '\regsvr32.exe'
        Image|endswith:
            - '\calc.exe'
            - '\cscript.exe'
            - '\explorer.exe'
            - '\mshta.exe'
            - '\net.exe'
            - '\net1.exe'
            - '\nltest.exe'
            - '\notepad.exe'
            - '\powershell.exe'
            - '\pwsh.exe'
            - '\reg.exe'
            - '\schtasks.exe'
            - '\werfault.exe'
            - '\wscript.exe'
    filter_main_werfault:
        Image|endswith: '\werfault.exe'
        CommandLine|contains: ' -u -p '
    condition: selection and not 1 of filter_main_*