Abuse of Service Permissions to Hide Services Via Set-Service

 1title: Abuse of Service Permissions to Hide Services Via Set-Service
 2id: 514e4c3a-c77d-4cde-a00f-046425e2301e
 3related:
 4    - id: a537cfc3-4297-4789-92b5-345bfd845ad0
 5      type: derived
 6    - id: 953945c5-22fe-4a92-9f8a-a9edc1e522da
 7      type: similar
 8status: test
 9description: Detects usage of the "Set-Service" powershell cmdlet to configure a new SecurityDescriptor that allows a service to be hidden from other utilities such as "sc.exe", "Get-Service"...etc. (Works only in powershell 7)
10references:
11    - https://twitter.com/Alh4zr3d/status/1580925761996828672
12    - https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/set-service?view=powershell-7.2
13author: Nasreddine Bencherchali (Nextron Systems)
14date: 2022-10-17
15tags:
16    - attack.persistence
17    - attack.privilege-escalation
18    - attack.execution
19    - attack.stealth
20    - attack.t1574.011
21logsource:
22    category: process_creation
23    product: windows
24detection:
25    selection_img:
26        - Image|endswith: '\pwsh.exe'
27        - OriginalFileName: 'pwsh.dll'
28    selection_sddl:
29        # Example would be: "D:(D;;DCLCWPDTSD;;;IU)(D;;DCLCWPDTSD;;;SU)(D;;DCLCWPDTSD;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)"
30        CommandLine|contains|all:
31            - 'Set-Service '
32            - 'DCLCWPDTSD'
33    selection_cmdlet:
34        CommandLine|contains:
35            - '-SecurityDescriptorSddl '
36            - '-sd '
37    condition: all of selection_*
38falsepositives:
39    - Rare intended use of hidden services
40level: high