Potentially Over Permissive Permissions Granted Using Dsacls.EXE

Detects usage of Dsacls to grant over permissive permissions

Sigma rule (View on GitHub)

 1title: Potentially Over Permissive Permissions Granted Using Dsacls.EXE
 2id: 01c42d3c-242d-4655-85b2-34f1739632f7
 3status: test
 4description: Detects usage of Dsacls to grant over permissive permissions
 5references:
 6    - https://ss64.com/nt/dsacls.html
 7    - https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/cc771151(v=ws.11)
 8author: Nasreddine Bencherchali (Nextron Systems)
 9date: 2022/06/20
10modified: 2023/02/04
11tags:
12    - attack.execution
13    - attack.t1218
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection_img:
19        - Image|endswith: '\dsacls.exe'
20        - OriginalFileName: "DSACLS.EXE"
21    selection_flag:
22        CommandLine|contains: ' /G '
23    selection_permissions:
24        CommandLine|contains: # Add more permissions as you see fit in your environment
25            - 'GR'
26            - 'GE'
27            - 'GW'
28            - 'GA'
29            - 'WP'
30            - 'WD'
31    condition: all of selection_*
32falsepositives:
33    - Legitimate administrators granting over permissive permissions to users
34level: medium

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