Detectionhightest

Potentially Suspicious Execution From Parent Process In Public Folder

Detects a potentially suspicious execution of a parent process located in the "\Users\Public" folder executing a child process containing references to shell or scripting binaries and commandlines.

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Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)Created Fri Feb 25Updated Fri Jul 1269bd9b97-2be2-41b6-9816-fb08757a4d1awindows

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_parent:
        ParentImage|contains: ':\Users\Public\'
    selection_child:
        - Image|endswith:
              - '\bitsadmin.exe'
              - '\certutil.exe'
              - '\cmd.exe'
              - '\cscript.exe'
              - '\mshta.exe'
              - '\powershell.exe'
              - '\pwsh.exe'
              - '\regsvr32.exe'
              - '\rundll32.exe'
              - '\wscript.exe'
        - CommandLine|contains:
              - 'bitsadmin'
              - 'certutil'
              - 'cscript'
              - 'mshta'
              - 'powershell'
              - 'regsvr32'
              - 'rundll32'
              - 'wscript'
    condition: all of selection_*