Breach and attack simulation (BAS) solutions are an emerging category of technology platforms that enable enterprises to simulate complex cyberattacks on demand. These tools help expose gaps so teams can remediate them before attackers can exploit them. In this review, SANS explores the Threat Simulator platform from Keysight Technologies, which helps teams conduct more simulations faster, continuously test the efficacy of control points, and create a more consistent security posture despite an ever-changing threat landscape.