Detectionlowtest

DD File Overwrite

Detects potential overwriting and deletion of a file using DD.

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Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), MSTICCreated Fri Oct 15Updated Thu Jul 072953194b-e33c-4859-b9e8-05948c167447linux

Log Source

LinuxProcess Creation

ProductLinux← raw: linux

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:
    selection1:
        Image:
            - '/bin/dd'
            - '/usr/bin/dd'
    selection2:
        CommandLine|contains: 'of='
    selection3:
        CommandLine|contains:
            - 'if=/dev/zero'
            - 'if=/dev/null'
    condition: all of selection*