New TimeProviders Registered With Uncommon DLL Name

 1title: New TimeProviders Registered With Uncommon DLL Name
 2id: e88a6ddc-74f7-463b-9b26-f69fc0d2ce85
 3status: experimental
 4description: |
 5    Detects processes setting a new DLL in DllName in under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProvider.
 6    Adversaries may abuse time providers to execute DLLs when the system boots.
 7    The Windows Time service (W32Time) enables time synchronization across and within domains.    
 8references:
 9    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1547.003/T1547.003.md
10author: frack113
11date: 2022/06/19
12modified: 2024/03/26
13tags:
14    - attack.persistence
15    - attack.privilege_escalation
16    - attack.t1547.003
17logsource:
18    category: registry_set
19    product: windows
20detection:
21    selection:
22        TargetObject|contains: '\Services\W32Time\TimeProviders'
23        TargetObject|endswith: '\DllName'
24    filter_main_w32time:
25        Details:
26            - '%SystemRoot%\System32\vmictimeprovider.dll'
27            - '%systemroot%\system32\w32time.dll'
28            - 'C:\Windows\SYSTEM32\w32time.DLL'
29    condition: selection and not 1 of filter_main_*
30falsepositives:
31    - Unknown
32level: high