Detection rules › Sigma
Potentially Suspicious Call To Win32_NTEventlogFile Class
Detects usage of the WMI class "Win32_NTEventlogFile" in a potentially suspicious way (delete, backup, change permissions, etc.) from a PowerShell script
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
| Security-Auditing | 4688 | A new process has been created. |
Stages and Predicates
Stage 1: all of selection_class
CommandLine|contains: Win32_NTEventlogFile
Stage 2: all of selection_function
or:
CommandLine|contains: '.BackupEventlog('
CommandLine|contains: '.ChangeSecurityPermissions('
CommandLine|contains: '.ChangeSecurityPermissionsEx('
CommandLine|contains: '.ClearEventLog('
CommandLine|contains: '.Delete('
CommandLine|contains: '.DeleteEx('
CommandLine|contains: '.Rename('
CommandLine|contains: '.TakeOwnerShip('
CommandLine|contains: '.TakeOwnerShipEx('
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 |
|---|---|---|
CommandLine | match |
|