The Splunk Attack Range is an open source project that lets security teams spin up instrumented cloud environments, simulate adversary behavior, and use the generated telemetry to build and test detections in Splunk. Whether you are a detection engineer tuning rules, a purple team validating coverage, or a developer automating tests, Attack Range gives you a repeatable, cloud-based lab. This post highlights what Attack Range does, how it works, and how to get started - whether you prefer a web UI, a REST API, or the command line.