sigmamediumHunting

Potentially Over Permissive Permissions Granted Using Dsacls.EXE

Detects usage of Dsacls to grant over permissive permissions

MITRE ATT&CK

defense-evasion

Detection Query

selection_img:
  - Image|endswith: \dsacls.exe
  - OriginalFileName: DSACLS.EXE
selection_flag:
  CommandLine|contains: " /G "
selection_permissions:
  CommandLine|contains:
    - GR
    - GE
    - GW
    - GA
    - WP
    - WD
condition: all of selection_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2022-06-20

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1218

Raw Content

title: Potentially Over Permissive Permissions Granted Using Dsacls.EXE
id: 01c42d3c-242d-4655-85b2-34f1739632f7
status: test
description: Detects usage of Dsacls to grant over permissive permissions
references:
    - https://ss64.com/nt/dsacls.html
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/cc771151(v=ws.11)
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-20
modified: 2023-02-04
tags:
    - attack.defense-evasion
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\dsacls.exe'
        - OriginalFileName: "DSACLS.EXE"
    selection_flag:
        CommandLine|contains: ' /G '
    selection_permissions:
        CommandLine|contains: # Add more permissions as you see fit in your environment
            - 'GR'
            - 'GE'
            - 'GW'
            - 'GA'
            - 'WP'
            - 'WD'
    condition: all of selection_*
falsepositives:
    - Legitimate administrators granting over permissive permissions to users
level: medium