Qilin EDR killer infection chain

This blog provides an in-depth analysis of the malicious “msimg32.dll” used in Qilin ransomware attacks, which is a multi-stage infection chain targeting EDR systems.

Endpoint detection and response (EDR) tools are widely deployed and far more capable than traditional antivirus. As a result, attackers use EDR killers to disable or bypass them. Disabling telemetry collection (process, memory, network activity) limits what defenders can see and analyze. As defenders improve behavioral detection, attackers increasingly target the defense layer itself as part of their initial access or early execution stages. This blog provides an in-depth analysis of the malicious “msimg32. dll” used in Qilin ransomware attacks, which is a multi-stage infection chain targeting EDR systems.

It can terminate over 300 different EDR drivers from almost every vendor in the market.