CmdID

CmdID / Rules / Windows

File And SubFolder Enumeration Via Dir Command

A Sigma rule for process creation on Windows, by frack113.

low 1 ATT&CK technique 1 program it names 3 everyday examples trip it

What it looks for

its detection, as SigmaHQ writes it
detection:
  filter_main_rmdir:
    CommandLine|contains: 'rmdir'
  selection_cli:
    CommandLine|contains: 'dir '
    CommandLine|contains|windash: '-s'
  selection_cmd:
    - Image|endswith: '\cmd.exe'
    - OriginalFileName: 'Cmd.Exe'
  condition: all of selection_* and not 1 of filter_main_*

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 frack113, 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.

Command lines that trip it

everyday examples from tldr-pages, CC BY 4.0, each read by CmdID

To display all directories one after the other, in alphabetical order, in wide format, and pausing after each screen, make sure that the root directory is the current directory, and then type on the page for dir

dir /s/w/o/pIdentify

To alter the preceding example so that dir displays the file names and extensions, but omits the directory names, type on the page for dir

dir /s/w/o/p/a:-dIdentify

To display a list of all the file names with the .txt extension in all directories on drive C, type on the page for dir

dir c:\*.txt /w/o/s/pIdentify

Programs and files it names

their pages here
cmd.exe

ATT&CK

the techniques it is tagged with
T1217Browser Information Discovery

Other rules for T1217 Browser Information Discovery

Suspicious Where Execution