Potential Discovery Activity Using Find - MacOS
A Sigma rule for process creation on macOS, by Nasreddine Bencherchali (Nextron Systems).
medium 1 ATT&CK technique 1 program it names
What it looks for
detection:
selection:
CommandLine|contains:
- '-perm -4000'
- '-perm -2000'
- '-perm 0777'
- '-perm -222'
- '-perm -o w'
- '-perm -o x'
- '-perm -u=s'
- '-perm -g=s'
Image|endswith: '/find'
condition: 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 Nasreddine Bencherchali (Nextron Systems), 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
ATT&CK
T1083File and Directory Discovery