CmdID

CmdID / Rules / Linux

Potential Container Discovery Via Inodes Listing

A Sigma rule for process creation on Linux, by Seth Hanford.

low 1 ATT&CK technique 1 program it names

What it looks for

its detection, as SigmaHQ writes it
detection:
  selection_ls_cli:
    - CommandLine|endswith: ' /'
    - CommandLine|contains: ' / '
  selection_ls_img:
    Image|endswith: '/ls'
  selection_regex_dir:
    CommandLine|re: '(?:\s-[^-\s]{0,20}d|\s--directory\s)'
  selection_regex_inode:
    CommandLine|re: '(?:\s-[^-\s]{0,20}i|\s--inode\s)'
  condition: all 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 Seth Hanford, 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
ls

ATT&CK

the techniques it is tagged with
T1082System Information Discovery

Other rules for T1082 System Information Discovery

OS Architecture Discovery Via Grep · Potential GobRAT File Discovery Via Grep · Container Residence Discovery Via Proc Virtual FS · Docker Container Discovery Via Dockerenv Listing · System Information Discovery · System Information Discovery Using Ioreg · System Information Discovery Using sw_vers · System Information Discovery Via Sysctl - MacOS · System Information Discovery Using System_Profiler · CMD Shell Output Redirect · System Information Discovery via Registry Queries · Suspicious Kernel Dump Using Dtrace