Hackers Repurpose RansomHub's EDRKillShifter in Medusa, BianLian, and Play Attacks
Mar 27, 2025
Endpoint Security / Ransomware
A new analysis has uncovered connections between affiliates of RansomHub and other ransomware groups like Medusa , BianLian , and Play . The connection stems from the use of a custom tool that's designed to disable endpoint detection and response (EDR) software on compromised hosts, according to ESET. The EDR killing tool, dubbed EDRKillShifter , was first documented as used by RansomHub actors in August 2024. EDRKillShifter accomplishes its goals by means of a known tactic called Bring Your Own Vulnerable Driver (BYOVD) that involves using a legitimate but vulnerable driver to terminate security solutions protecting the endpoints. The idea behind using such tools is to ensure the smooth execution of the ransomware encryptor without it being flagged by security solutions. "During an intrusion, the goal of the affiliate is to obtain admin or domain admin privileges," ESET researchers Jakub Souček and Jan Holman said in a report shared with The Hacker News. "...
