The Cyber Security Evaluation Tool (CSET®) is a stand-alone desktop application that guides asset owners and operators through a systematic process of evaluating Operational Technology and Information Technology. On June 30, 2021, CSET was updated to include a new module: Ransomware Readiness Assessment (RRA). The RRA is a self-assessment based on a tiered set of practices to help organizations better assess how well they are equipped to defend against and recover from a ransomware incident.
After completing the evaluation, the organization will receive reports that present the assessment results in both a summarized and detailed manner. The organization will be able to manipulate and filter content in order to analyze findings with varying degrees of granularity.
The CSET Download has moved to GitHub: https://cset-download.inl.gov/
You can also find older legacy versions of the software on GitHub.
(this is taken from https://us-cert.cisa.gov/ics/Downloading-and-Installing-CSET)