![]() Here are some useful commands for exploring existing trace sessions and their respective ETW providers note that these must usually be executed from an elevated context. Sessions are created and configured by controllers like the built-in logman.exe command line utility. Tracing sessions are responsible for collecting events from providers and for relaying them to log files and consumers. ![]() The ETW architecture differentiates between event providers, event consumers, and event tracing sessions. The goal of this blog post is to share our knowledge with the community by covering ETW background and basics, stealthy event log tampering techniques, and detection strategies. We continually evaluate our assumptions regarding the integrity of our event data sources, document our blind spots, and adjust our implementation. ![]() The Windows event log is the data source for many of the Palantir Critical Incident Response Team’s Alerting and Detection Strategies, so familiarity with event log tampering tradecraft is foundational to our success. Though the act of clearing an event log itself generates an event, attackers who know ETW well may take advantage of tampering opportunities to cease the flow of logging temporarily or even permanently, without generating any event log entries in the process. Attackers often clear event logs to cover their tracks. Event Tracing for Windows (ETW) is the mechanism Windows uses to trace and log system events.
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