Rascals are always sociable, and the chief sign that a man has any nobility in his character is the little pleasure he takes in others company. Arthur Schopenhauer

Hayabusa is a Windows event log fast forensics timeline generator and threat hunting tool created by the Yamato Security group in Japan. Hayabusa means “peregrine falcon” in Japanese and was chosen as peregrine falcons are the fastest animal in the world, great at hunting and highly trainable. It is written in Rust and supports multi-threading in order to be as fast as possible. We have provided a tool to convert sigma rules into hayabusa rule format.

The hayabusa detection rules are based on sigma rules, written in YML in order to be as easily customizable and extensible as possible. It can be run either on running systems for live analysis or by gathering logs from multiple systems for offline analysis. (At the moment, it does not support real-time alerting or periodic scans.) The output will be consolidated into a single CSV timeline for easy analysis in Excel, Timeline Explorer, or Elastic Stack. Hayabusa