Chainsaw — designed as a “first-response” capability to identify threats within Windows event logs quickly.
Chainsaw offers a “generic and fast method of searching through event logs for keywords, and by identifying threats using built-in detection logic and via support for Sigma detection rules” — written in Rust and accessible via the command line.

Chainsaw’s Authors Describe It As:

Search and extract event log records using event IDs, string matching, and regex patterns.
Hunt for threats using Sigma detection rules and custom built-in detection logic.
Output in ASCII table, CSV, or JSON formats.
Document tagging (detection logic matching)

Chainsaw includes the ability to search through event logs by event ID, keyword, and regex patterns; extraction and parsing of Windows Defender, F-Secure, Sophos, and Kaspersky AV alerts; detect key event logs being cleared or the event log service being stopped; users being created or added to sensitive user groups; brute-force of local user accounts; RDP logins, network logins, etc., and Sigma rule detection against a wide variety of Windows event IDs. Security folks can get Chainsaw for free.