RestrictedAdminMode Registry Value Tampering

calendar Oct 23, 2025 · attack.persistence attack.defense-evasion attack.t1112  ·
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Detects changes to the "DisableRestrictedAdmin" registry value in order to disable or enable RestrictedAdmin mode. RestrictedAdmin mode prevents the transmission of reusable credentials to the remote system to which you connect using Remote Desktop. This prevents your credentials from being harvested during the initial connection process if the remote server has been compromise

Sigma rule (View on GitHub)

 1title: RestrictedAdminMode Registry Value Tampering
 2id: d6ce7ebd-260b-4323-9768-a9631c8d4db2
 3related:
 4    - id: 28ac00d6-22d9-4a3c-927f-bbd770104573 # process_creation
 5      type: similar
 6status: test
 7description: |
 8    Detects changes to the "DisableRestrictedAdmin" registry value in order to disable or enable RestrictedAdmin mode.
 9    RestrictedAdmin mode prevents the transmission of reusable credentials to the remote system to which you connect using Remote Desktop.
10    This prevents your credentials from being harvested during the initial connection process if the remote server has been compromise    
11references:
12    - https://github.com/redcanaryco/atomic-red-team/blob/a8e3cf63e97b973a25903d3df9fd55da6252e564/atomics/T1112/T1112.md
13    - https://social.technet.microsoft.com/wiki/contents/articles/32905.remote-desktop-services-enable-restricted-admin-mode.aspx
14author: frack113
15date: 2023-01-13
16modified: 2024-08-23
17tags:
18    - attack.persistence
19    - attack.defense-evasion
20    - attack.t1112
21logsource:
22    product: windows
23    category: registry_set
24detection:
25    selection:
26        TargetObject|endswith: 'System\CurrentControlSet\Control\Lsa\DisableRestrictedAdmin'
27    condition: selection
28falsepositives:
29    - Unknown
30level: high

References

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