Local Groups Discovery - MacOs

A Sigma rule for process creation on macOS, by Ömer Günal, Alejandro Ortuno, oscd.community.

informational 1 ATT&CK technique 1 program it names

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection_1:
    CommandLine|contains|all:
      - '-q'
      - 'group'
    Image|endswith: '/dscacheutil'
  selection_2:
    CommandLine|contains: '/etc/group'
    Image|endswith: '/cat'
  selection_3:
    CommandLine|contains|all:
      - '-list'
      - '/groups'
    Image|endswith: '/dscl'
  condition: 1 of selection*

The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by Ömer Günal, Alejandro Ortuno, oscd.community, under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.

None of the everyday examples and documented commands on CmdID’s program pages trips it. To see whether a command line does, paste it into CmdID.

Programs and files it names

their pages here

cat

ATT&CK

the techniques it is tagged with

T1069.001Permission Groups Discovery: Local Groups

Local Groups Discovery - MacOs

What it looks for

Programs and files it names

ATT&CK

Other rules for T1069.001 Permission Groups Discovery: Local Groups