Directory Removal Via Rmdir

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

low 1 ATT&CK technique 1 program it names 4 everyday examples trip it

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection_flags:
    CommandLine|contains:
      - '/s'
      - '/q'
  selection_img:
    - Image|endswith: '\cmd.exe'
    - OriginalFileName: 'Cmd.Exe'
  selection_rmdir:
    CommandLine|contains: 'rmdir'
  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 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 remove a directory named test (and all its subdirectories and files) from the current directory, type on the page for rmdir

rmdir /s testIdentify

To run the previous example in quiet mode, type on the page for rmdir

rmdir /s /q testIdentify

Remove a directory and its contents recursively on the page for rmdir

rmdir path\to\directory /sIdentify

Remove a directory and its contents recursively without prompting on the page for rmdir

rmdir path\to\directory /s /qIdentify

The commands LOLBAS or GTFOBins documents for unregmp2.exe trip it too: each is on its program’s page, read by CmdID.

Programs and files it names

their pages here

cmd.exe

ATT&CK

the techniques it is tagged with

T1070.004Indicator Removal: File Deletion

Directory Removal Via Rmdir

What it looks for

Command lines that trip it

Programs and files it names

ATT&CK

Other rules for T1070.004 Indicator Removal: File Deletion