New TimeProviders Registered With Uncommon DLL Name

Title: New TimeProviders Registered With Uncommon DLL Name
Status: test
Description:Detects processes setting a new DLL in DllName in under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProvider. Adversaries may abuse time providers to execute DLLs when the system boots. The Windows Time service (W32Time) enables time synchronization across and within domains.
References:
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1547.003/T1547.003.md
Author: frack113
Date: 2022-06-19
modified:2024-03-26
Tags:

• -'attack.persistence'
• -'attack.privilege-escalation'
• -'attack.t1547.003'

Logsource:

• category: registry_set
• product: windows

Detection:
  selection:
    TargetObject|contains: '\Services\W32Time\TimeProviders'
    TargetObject|endswith: '\DllName'
  filter_main_w32time:
    Details:
      -'%SystemRoot%\System32\vmictimeprovider.dll'
      -'%systemroot%\system32\w32time.dll'
      -'C:\Windows\SYSTEM32\w32time.DLL'

  condition:selection and not 1 of filter_main_*
Falsepositives:
  -Unknown
Level: high