Detectionmediumtest

Potential Command Line Path Traversal Evasion Attempt

Detects potential evasion or obfuscation attempts using bogus path traversal via the commandline

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Christian Burkard (Nextron Systems)Created Tue Oct 26Updated Wed Mar 291327381e-6ab0-4f38-b583-4c1b8346a56bwindows

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_1:
        Image|contains: '\Windows\'
        CommandLine|contains:
            - '\..\Windows\'
            - '\..\System32\'
            - '\..\..\'
    selection_2:
        CommandLine|contains: '.exe\..\'
    filter_optional_google_drive:
        CommandLine|contains: '\Google\Drive\googledrivesync.exe\..\'
    filter_optional_citrix:
        CommandLine|contains: '\Citrix\Virtual Smart Card\Citrix.Authentication.VirtualSmartcard.Launcher.exe\..\'
    condition: 1 of selection_* and not 1 of filter_optional_*