Killing me gently: Inside Gentlemen’s EDR killer framework

The Gentlemen ransomware-as-a-service (RaaS) gang has emerged as a significant and technically agile threat, distinguished by its proactive development and maintenance of a comprehensive suite of Endpoint Detection and Response (EDR) killers. Unlike many RaaS groups, Gentlemen doesn't rely on affiliates to source their EDR tools; instead, operators actively develop and provide these tools to affiliates. The group’s victimology is notably focused on Southeast Asia, South America, and Western Europe, diverging significantly from the US-centric approach of most major RaaS operations. Gentlemen utilizes a sophisticated defense evasion strategy, including binary protection and vendor impersonation, to bypass security solutions. The group’s internal data leak provided crucial evidence of their EDR-killer program and highlighted their unique approach to the ransomware landscape.