Detection rules › Sigma
New TimeProviders Registered With Uncommon DLL Name
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.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1547.003 Boot or Logon Autostart Execution: Time Providers |
| Privilege Escalation | T1547.003 Boot or Logon Autostart Execution: Time Providers |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 13 | RegistryEvent (Value Set) |
Stages and Predicates
Stage 1: selection
TargetObject|endswith: '\DllName'
TargetObject|contains: '\Services\W32Time\TimeProviders'
Stage 2: not 1 of filter_main_w32time
Details: ['%SystemRoot%\System32\vmictimeprovider.dll', '%systemroot%\system32\w32time.dll', 'C:\Windows\SYSTEM32\w32time.DLL']
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
Details | eq |
|
TargetObject | ends_with |
|
TargetObject | match |
|