Detection rules › Sigma
Unauthorized System Time Modification
Detect scenarios where a potentially unauthorized application or user is modifying the system time.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Evasion | T1070.006 Indicator Removal: Timestomp |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Security-Auditing | 4616 | The system time was changed. |
Stages and Predicates
Stage 1: selection
Stage 2: not 1 of filter_main_svchost
ProcessName: 'C:\Windows\System32\svchost.exe'
SubjectUserSid: S-1-5-19
Stage 3: not 1 of filter_optional_vmtools
ProcessName: ['C:\Program Files (x86)\VMware\VMware Tools\vmtoolsd.exe', 'C:\Program Files\VMware\VMware Tools\vmtoolsd.exe', 'C:\Windows\System32\VBoxService.exe', 'C:\Windows\System32\oobe\msoobe.exe']
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 |
|---|---|---|
ProcessName | eq |
|
SubjectUserSid | eq |
|