Suspicious 'Admin' Local User Creation with Net Command

 1title: Suspicious 'Admin' Local User Creation with Net Command
 2id: 0ce1911b-5038-4ee7-8925-013d808c6c7f
 3status: experimental
 4description: Detects creation of a local user account using the net command with 'Admin' in the name - this technique is used by Vice Society ransomware gang to create bogus user accounts that attempt to blend in with an administrative user account naming convention.
 5references:
 6    - https://www.microsoft.com/en-us/security/blog/2022/10/25/dev-0832-vice-society-opportunistic-ransomware-campaigns-impacting-us-education-sector/
 7author: Micah Babinski
 8date: 2022/11/28
 9tags:
10    - attack.persistence
11    - attack.privilege_escalation
12    - attack.t1136.001
13    - attack.t1136
14    - attack.t1078
15    - attack.t1078.003
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection:
21        Image|endswith: '\net.exe'
22        CommandLine|contains:
23            - 'user'
24            - 'add'
25            - 'adm'
26    condition: selection
27falsepositives:
28    - Valid creation of local user accounts with adm in the name (should be rare)
29level: high```