ATT&CK is a knowledge base of cyber adversary behavior and taxonomy for adversarial actions across their lifecycle. ATT&CK has several parts: PRE-ATT&CK, which focuses on reconnaissance and infrastructure setup, ATT&CK for Enterprise, which covers behavior against enterprise IT networks and cloud, and ATT&CK for Mobile, which focuses on behavior against mobile devices.
The Cyber Analytics Repository (CAR) is a knowledge base of analytics developed by MITRE based on the ATT&CK adversary model.