Detectionlowtest

Local System Accounts Discovery - MacOs

Detects enumeration of local systeam accounts on MacOS

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Alejandro Ortuno, oscd.communityCreated Thu Oct 08Updated Sun Nov 27ddf36b67-e872-4507-ab2e-46bda21b842cmacos

Log Source

macOSProcess Creation

ProductmacOS← raw: macos

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|endswith: '/dscl'
        CommandLine|contains|all:
            - 'list'
            - '/users'
    selection_2:
        Image|endswith: '/dscacheutil'
        CommandLine|contains|all:
            - '-q'
            - 'user'
    selection_3:
        CommandLine|contains: '''x:0:'''
    selection_4:
        Image|endswith: '/cat'
        CommandLine|contains:
            - '/etc/passwd'
            - '/etc/sudoers'
    selection_5:
        Image|endswith: '/id'
    selection_6:
        Image|endswith: '/lsof'
        CommandLine|contains: '-u'
    condition: 1 of selection*