etw

etw is a Go-package that allows you to receive Event Tracing for Windows (ETW) events in go code.

etw allows you to process events from new TraceLogging providers as well as from classic (aka EventLog) providers, so you could actually listen to anything you can see in Event Viewer window.

Fork info

This is a fork of https://github.com/bi-zone/etw that adds some functionality, especially:

• Looking up (manifest) providers at runtime
• Building without CGO
• Filtering on ETW sessions
• Registering for multiple providers in a single ETW session

Docs

Package reference is available at https://pkg.go.dev/github.com/secDre4mer/etw

Examples are located in examples folder.

Usage

package main

import (
	"log"
	"os"
	"os/signal"
	"sync"

	"github.com/secDre4mer/etw"
)

func main() {
	session, err := etw.NewSession()
	if err != nil {
		log.Fatalf("Failed to create etw session: %s", err)
	}

	// Subscribe to Microsoft-Windows-DNS-Client
	dnsClient, err := etw.LookupProvider("Microsoft-Windows-DNS-Client")
	if err != nil {
		log.Fatalf("Failed to find DNS client provider: %s", err)
    }
	if err := session.AddProvider(dnsClient.Guid); err != nil {
		log.Fatalf("Failed to register for provider: %v", err)
	}

	// Wait for "DNS query request" events to log outgoing DNS requests.
	cb := func(e *etw.Event) {
		if e.Header.ID != 3006 {
			return
		}
		if data, err := e.EventProperties(); err == nil && data["QueryType"] == "1" {
			log.Printf("PID %d just queried DNS for domain %v", e.Header.ProcessID, data["QueryName"])
		}
	}

	// `session.Process` blocks until `session.Close()`, so start it in routine.
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		if err := session.Process(cb); err != nil {
			log.Printf("[ERR] Got error processing events: %s", err)
		}
		wg.Done()
	}()

	// Trap cancellation.
	sigCh := make(chan os.Signal, 1)
	signal.Notify(sigCh, os.Interrupt)
	<-sigCh

	if err := session.Close(); err != nil {
		log.Printf("[ERR] Got error closing the session: %s", err)
	}
	wg.Wait()
}

More sophisticated examples can be found in examples folder.

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.