Nltest.EXE Execution — Sigma Rule

Rule metadata and linked tags

Author: Arun Chauhan. Source status: test; severity: low. Source dates: 2023-02-03 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 1210867b8d10a3d3f10d34a95e80d7fa87240377e0ba4cb05b9859e56bb3c6f7

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: Nltest.EXE Execution
id: 903076ff-f442-475a-b667-4f246bcc203b
related:
    - id: 5cc90652-4cbd-4241-aa3b-4b462fa5a248
      type: similar
    - id: eeb66bbb-3dde-4582-815a-584aee9fe6d1
      type: obsolete
status: test
description: Detects nltest commands that can be used for information discovery
references:
    - https://jpcertcc.github.io/ToolAnalysisResultSheet/details/nltest.htm
author: Arun Chauhan
date: 2023-02-03
tags:
    - attack.discovery
    - attack.t1016
    - attack.t1018
    - attack.t1482
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\nltest.exe'
        - OriginalFileName: 'nltestrk.exe'
    condition: selection
falsepositives:
    - Legitimate administration activity
level: low

Original YAML and metadata in JSON

False positives

• Legitimate administration activity

Source references

• https://jpcertcc.github.io/ToolAnalysisResultSheet/details/nltest.htm