Hook system calls on Windows by using Kaspersky's hypervisor
Kaspersky utilizes its hypervisor when hardware virtualization is supported for additional protection. It hooks system calls by changing IA32_LSTAR
to point to its own syscall handler (which is basically a copy of KiSystemCall64
) so it dispatches system calls to its own handlers (while doing initialization, it builds its own dispatch table).
This project loads klhk.sys (Kaspersky's hypervisor module) and a custom driver which interfaces with it to subvert the system and hook system calls.
While researching Kaspersky components, I thought it was an interesting idea to write a custom project that lets me hook system calls by using Kaspersky's hypervisor to take a closer look at what it is doing.
- Download Visual Studio 2019, WDK, clone this repository and build the solution.
- Make sure
klhk.sys
,KasperskyHook.sys
andKasperskyHookLoader.exe
are in the same folder. - Execute
KasperskyHookLoader.exe
and have fun :D
MAKE SURE TO ENABLE TEST MODE TO TEST THIS PROJECT. IF YOU WISH TO USE IT OUTSIDE TEST MODE, USE YOUR CUSTOM DRIVER LOADER OR SIGN THE DRIVER.