Read Contents From Stdin Via Cmd.EXE — Sigma Rule

Rule metadata and linked tags

Author: frack113, Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-03-07 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: d57f367f3a855369a3d7718538ddcd2064c41cddde97d2ebc4d9ba8a4652c8fb

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: Read Contents From Stdin Via Cmd.EXE
id: 241e802a-b65e-484f-88cd-c2dc10f9206d
related:
    - id: 00a4bacd-6db4-46d5-9258-a7d5ebff4003
      type: obsolete
status: test
description: Detect the use of "<" to read and potentially execute a file via cmd.exe
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/40b77d63808dd4f4eafb83949805636735a1fd15/atomics/T1059.003/T1059.003.md
    - https://web.archive.org/web/20220306121156/https://www.x86matthew.com/view_post?id=ntdll_pipe
author: frack113, Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-07
tags:
    - attack.execution
    - attack.t1059.003
logsource:
    category: process_creation
    product: windows
detection:
    selection_cmd:
        - OriginalFileName: 'Cmd.Exe'
        - Image|endswith: '\cmd.exe'
    selection_cli:
        CommandLine|contains: '<'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/40b77d63808dd4f4eafb83949805636735a1fd15/atomics/T1059.003/T1059.003.md
• https://web.archive.org/web/20220306121156/https://www.x86matthew.com/view_post?id=ntdll_pipe