Windows Share Mount Via Net.EXE — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: low. Source dates: 2023-02-02 / 2023-02-21.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 6430573abec3cbd97b58de0656ee9a5ac294983e7ee98ce1a79ef7edc0e8237e

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: Windows Share Mount Via Net.EXE
id: f117933c-980c-4f78-b384-e3d838111165
related:
    - id: 3abd6094-7027-475f-9630-8ab9be7b9725
      type: similar
status: test
description: Detects when a share is mounted using the "net.exe" utility
references:
    - https://drive.google.com/file/d/1lKya3_mLnR3UQuCoiYruO3qgu052_iS_/view
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-02-02
modified: 2023-02-21
tags:
    - attack.lateral-movement
    - attack.t1021.002
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - '\net.exe'
              - '\net1.exe'
        - OriginalFileName:
              - 'net.exe'
              - 'net1.exe'
    selection_cli:
        CommandLine|contains:
            - ' use '
            - ' \\\\'
    condition: all of selection_*
falsepositives:
    - Legitimate activity by administrators and scripts
level: low

Original YAML and metadata in JSON

False positives

• Legitimate activity by administrators and scripts

Source references

• https://drive.google.com/file/d/1lKya3_mLnR3UQuCoiYruO3qgu052_iS_/view