Qilin Ransomware Deploys Malicious DLL to Disable Most EDR Defenses

The report describes a sophisticated Qilin ransomware infection chain that side-loads a malicious msimg32.dll to execute an in-memory payload, uses structured and vectored exception handling plus clean syscall scanning to evade EDR behavioral monitoring, performs geo-fencing to avoid post‑Soviet systems, and deploys two kernel drivers (rwdrv.sys and hlpdrv.sys) — one to access physical memory and remove EDR callbacks and another to terminate protected EDR processes — while temporarily disabling Windows Code Integrity to proceed undetected.