blue-team-tools/rules/windows/process_creation/win_net_user_add.yml

title: Net.exe User Account Creation
id: cd219ff3-fa99-45d4-8380-a7d15116c6dc
status: experimental
description: Identifies 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/master/atomics/T1136/T1136.yaml
author: Endgame, JHasenbusch (adapted to sigma for oscd.community)
date: 2018/10/30
modified: 2020/09/01
tags:
    - attack.persistence
    - attack.t1136          # an old one
    - attack.t1136.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: 
            - '\net.exe'
            - '\net1.exe'
        CommandLine|contains|all: 
            - 'user'
            - 'add'
    condition: selection
fields:
    - ComputerName
    - User
    - CommandLine
falsepositives:
    - Legit user creation
    - Better use event ids for user creation rather than command line rules
level: medium