ZwSetInformationThread¶

#include <Windows.h>
#include <stdio.h>

typedef DWORD(WINAPI* ZW_SET_INFORMATION_THREAD) (HANDLE, DWORD, PVOID, ULONG);
#define ThreadHideFromDebugger 0x11
VOID DisableDebugEvent(VOID)
{
    HINSTANCE hModule;
    ZW_SET_INFORMATION_THREAD ZwSetInformationThread;
    hModule = GetModuleHandleA("Ntdll");
    ZwSetInformationThread = (ZW_SET_INFORMATION_THREAD)GetProcAddress(hModule, "ZwSetInformationThread");
    ZwSetInformationThread(GetCurrentThread(), ThreadHideFromDebugger, 0, 0);
}

int main()
{
    printf("Begin\n");
    DisableDebugEvent();
    printf("End\n");
    return 0;
}