File And SubFolder Enumeration Via Dir Command — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: low. Source dates: 2021-12-13 / 2026-05-18.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: e792c662640131dd811070535000c40fdf14503b001314f6b34ee6e2705e72c0

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: File And SubFolder Enumeration Via Dir Command
id: 7c9340a9-e2ee-4e43-94c5-c54ebbea1006
status: test
description: |
    Detects usage of the "dir" command part of Windows CMD with the "/S" command line flag in order to enumerate files in a specified directory and all subdirectories.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1217/T1217.md
author: frack113
date: 2021-12-13
modified: 2026-05-18
tags:
    - attack.discovery
    - attack.t1217
logsource:
    category: process_creation
    product: windows
detection:
    selection_cmd:
        - Image|endswith: '\cmd.exe'
        - OriginalFileName: Cmd.Exe
    selection_cli:
        CommandLine|contains|windash: '-s'
        CommandLine|contains: 'dir '
    filter_main_rmdir:
        CommandLine|contains: 'rmdir'
    condition: all of selection_* and not 1 of filter_main_*
falsepositives:
    - Likely
level: low
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_cmd_dir_execution/info.yml
simulation:
    - type: atomic-red-team
      name: List Internet Explorer Bookmarks using the command prompt
      technique: T1217
      atomic_guid: 727dbcdb-e495-4ab1-a6c4-80c7f77aef85

Original YAML and metadata in JSON

False positives

• Likely

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1217/T1217.md