This third edition of the Hacker’s Playbook Findings Report continues in the tradition of reporting enterprise security trends from the point of view of an attacker. The findings represent anonymized data from many millions of SafeBreach breach methods executed within real production environments. This edition includes existing Hacker’s Playbook Findings Report data and new data from deployments between January 2017 and November 2017, with a combination of over 3,400 total breach methods and almost 11.5 million simulations completed. This report reflects which attacks are blocked, which are successful, and key trends and findings based on actual security controller effectiveness.