Sigma Rule Library

Windows Share Mount Via Net.EXE

Detects when a share is mounted using the "net.exe" utility

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Detection logic

selection_img

- Image|endswith:
    - \net.exe
    - \net1.exe
- OriginalFileName:
    - net.exe
    - net1.exe

selection_cli

CommandLine|contains:
  - " use "
  - " \\\\\\\\"

Condition

all of selection_*

Raw YAML

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

False positives

  • Legitimate activity by administrators and scripts

References

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