Detectionmediumtest

Potential Dosfuscation Activity

Detects possible payload obfuscation via the commandline

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

François Hubaut, Nasreddine Bencherchali (Nextron Systems)Created Tue Feb 15Updated Mon Mar 06a77c1610-fc73-4019-8e29-0f51efc04a51windows

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:
        CommandLine|contains:
            - '^^'
            - '^|^'
            - ',;,'
            - ';;;;'
            - ';; ;;'
            - '(,(,'
            - '%COMSPEC:~'
            - ' c^m^d'
            - '^c^m^d'
            - ' c^md'
            - ' cm^d'
            - '^cm^d'
            - ' s^et '
            - ' s^e^t '
            - ' se^t '
            # - '%%'
            # - '&&'
            # - '""'
    condition: selection