There are 4 repositories under attack-simulation topic.
A tool that allows you to create vulnerable instrumented local or cloud environments to simulate attacks against and collect the data into Splunk
GitHub Actions Goat: Deliberately Vulnerable GitHub Actions CI/CD Environment
User Enumeration of Microsoft Teams users via API
APT Simulator
A Splunk App for Attack Range Reporting. Provides dashboards for insights on your attack range simulations
Project to learn how to Protect Resources and Data in the Cloud
PurpleSharpEnhanced is a C# adversary simulation tool that executes adversary techniques with the purpose of generating attack telemetry in monitored Windows environments
An Ethereum attack reproducer for security study.