DsArk64.sys

DsArk64.sys is a WHQL Microsoft-signed anti-rootkit kernel driver from Qihoo 360 Total Security. It exposes kernel-level process termination via ZwTerminateProcess from Ring 0 (kills PPL-protected processes), arbitrary kernel memory read (512 bytes), and arbitrary kernel memory write (32 bytes). The driver gates device access behind a custom Authenticode signing check that validates the calling process PE signature against Qihoo root certificates. This check is fully bypassed via process hollowing into any Qihoo-signed executable (freely downloadable from 360.cn). The process kill IOCTL (0x80863008) requires no encryption or additional auth beyond the device open -- just a raw 4-byte PID. The kernel R/W IOCTLs use AES-128-CBC with a static key embedded in the binary. Initialization requires setting registry key HKLM\SYSTEM\CCS\Services\360FsFlt\daboot to 1.

sc.exe create DsArk binPath=C:\windows\temp\DsArk64.sys type=kernel && sc.exe start DsArk