New User Created Via Net.EXE

Title: New User Created Via Net.EXE
Status: test
Description:Identifies the creation of local users via the net.exe command.
References:
  -https://eqllib.readthedocs.io/en/latest/analytics/014c3f51-89c6-40f1-ac9c-5688f26090ab.html
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1136.001/T1136.001.md
Author: Endgame, JHasenbusch (adapted to Sigma for oscd.community)
Date: 2018-10-30
modified:2023-02-21
Tags:

• -'attack.persistence'
• -'attack.t1136.001'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection_img:
    - Image|endswith:
      - '\net.exe'
      - '\net1.exe'
    - OriginalFileName:
      - 'net.exe'
      - 'net1.exe'
  selection_cli:
    CommandLine|contains|all:
      -'user'
      -'add'

  condition:all of selection_*
Falsepositives:
  -Legitimate user creation.
  -Better use event IDs for user creation rather than command line rules.
Level: medium