The following analytic utilizes Windows Event ID 1100 to identify when Windows event log service is shutdown. Note that this is a voluminous analytic that will require tuning or restricted to specific endpoints based on criticality. This event generates every time Windows Event Log service has shut down. It also generates during normal system shutdown. During triage, based on time of day and user, determine if this was planned. If not planned, follow through with reviewing parallel alerts and other data sources to determine what else may have occurred.
- Type: TTP
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2021-06-17
- Author: Mauricio Velazco, Splunk
- ID: 2b85aa3d-f5f6-4c2e-a081-a09f6e1c2e40
|T1070.001||Clear Windows Event Logs||Defense Evasion|
(`wineventlog_security` EventCode=1100) | stats count min(_time) as firstTime max(_time) as lastTime by dest Message EventCode | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `suspicious_event_log_service_behavior_filter`
Associated Analytic Story
How To Implement
To successfully implement this search, you need to be ingesting Windows event logs from your hosts. In addition, the Splunk Windows TA is needed.
Kill Chain Phase
- Actions on Objectives
Known False Positives
It is possible the Event Logging service gets shut down due to system errors or legitimately administration tasks. Filter as needed.
|9.0||30||30||The Windows Event Log Service shutdown on $ComputerName$|
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