krabsetw is a C++ library that simplifies interacting with ETW. It allows for any number of traces and providers to be enabled and for client code to register for event notifications from these traces.
krabsetw also provides code to simplify parsing generic event data into strongly typed data types.
Microsoft.O365.Security.Native.ETW is a C++ CLI (.NET) wrapper around krabsetw. It provides the same functionality as krabsetw to .NET applications and is used in production by the Office 365 Security team. It's affectionately referred to as Lobsters.
Examples & Documentation
- An ETW Primer.
- Simple examples can be found in the
- Please refer to KrabsExample.md and LobstersExample.md for detailed examples.
- SampleKrabsCSharpExe is a non-trivial example demonstrating how to manage the trace objects.
- Using Message Analyzer to find new ETW event sources.
Microsoft.O365.Security.Native.ETWonly support x64. No effort has been made to support x86.
Microsoft.O365.Security.Native.ETWare only supported on Windows 7 or Windows 2008R2 machines and above.
- Throwing exceptions in the event handler callback or krabsetw or Microsoft.O365.Security.Native.ETW will cause the trace to stop processing events.
- The call to "start" on the trace object is blocking so thread management may be necessary.
- The Visual Studio solution is krabs\krabs.sln.
- When building a native code binary using the
krabsetwpackage, please refer to the compilation readme for notes about the
NuGet packages are available both for the krabsetw C++ headers and the Microsoft.O365.Security.Native.ETW .NET library:
- https://www.nuget.org/packages/Microsoft.O365.Security.Native.ETW.Debug/ (for development - provides type asserts)
For verifying the .NET binaries, you can use the following command:
sn -T Microsoft.O365.Security.Native.ETW.dll
The expected output is:
Microsoft (R) .NET Framework Strong Name Utility Version 4.0.30319.0 Copyright (c) Microsoft Corporation. All rights reserved. Public key token is 31bf3856ad364e35
Community & Contact
Please feel free to file issues through GitHub for bugs and feature requests and we'll respond to them as quickly as we're able.