#include <windows.h>
#include <iostream>
using namespace std;

int main()
{

	//********* ESTRUCTURAS ***********
	  
	  PROCESS_INFORMATION	Process_Info = {0};
	  STARTUPINFO StartUpInfo = {0};
	
	//********** VARIABLES ************

	  HMODULE	Modulo;
	  FARPROC	Funcion;
	  LPCVOID	Virtual;
	  HANDLE	ThreadId;
	  int		Ret;

	  wchar_t App_Name[] = L"Hola.exe";
	  wchar_t Dll_Name[] = L"dllvirus.dll";  
	
    //************ INICIO *************

	StartUpInfo.cb = sizeof(StartUpInfo);
	
	cout << endl;
	
	Modulo = LoadLibraryA("kernel32.dll");
	cout << "Kernel32 BaseAddress: " << Modulo << endl;
	Funcion = GetProcAddress(Modulo, "LoadLibraryA");
	cout << "LoadLibraryA BaseAddress: " << Funcion << endl;
	
	cout << endl;

	// NORMAL_PRIORITY_CLASS
	// CREATE_SUSPENDED
	Ret = CreateProcess(App_Name, NULL, NULL, NULL, FALSE, CREATE_SUSPENDED, NULL, NULL, &StartUpInfo, &Process_Info);
	cout << "CreateProcess ERROR CODE: " << GetLastError() << endl;
	cout << "CreateProcess return value: " << Ret << endl;

	cout << endl;
	
	cout << "*************************" << endl;
	cout << "* hProcess: " << Process_Info.hProcess << "\t*" << endl;
	cout << "* hThread: " << Process_Info.hThread << "\t*" << endl;
	cout << "* dwThreadId: " << Process_Info.dwThreadId << "\t*" << endl;
	cout << "* dwProcessId: " << Process_Info.dwProcessId << "\t*" << endl;
	cout << "*************************" << endl;

	cout << endl;
	int DllLen = 12;
	cout << "dllvirus.dll" << " LEN: " << DllLen << endl;
	
	cout << endl;

	Virtual = VirtualAllocEx(Process_Info.hProcess, NULL, DllLen, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
	cout << "VirtualAllocEx ERROR CODE: " << GetLastError() << endl;
	cout << "VirtualAllocEx: " << Virtual << endl;

	cout << endl;

	Ret = WriteProcessMemory(Process_Info.hProcess, &Virtual, &DllLen, DllLen, NULL);
	cout << "WriteProcessMemory ERROR CODE: " << GetLastError() << endl;
	cout << "WriteProcessMemory return value: " << Ret << endl;

	cout << endl;

	ThreadId = CreateRemoteThread(Process_Info.hProcess, NULL, 0, (LPTHREAD_START_ROUTINE)Funcion, &Virtual, 0, NULL);
	cout << "CreateRemoteThread ERROR CODE: " << GetLastError() << endl;
	cout << "CreateRemoteThread Handle: " << ThreadId << endl;

	cout << endl;
	cout << "Waiting for CreateRemoteThread..." << endl;
	cout << endl;

	WaitForSingleObject(Process_Info.hProcess, 1000);
	
	cout << endl;
	cout << "Lunching App..." << endl;
	cout << endl;

	ResumeThread(Process_Info.hProcess);
		
	cout << endl;
	cout << "Closing Handle..." << endl;
	cout << endl;

	CloseHandle(Process_Info.hProcess);
	
	cout << endl;
	cout << "End :)" << endl;
	cout << endl;

	cin.get();

return 0;
}

Ret = WriteProcessMemory(Process_Info.hProcess, (LPVOID)Virtual, &Dll_Name, DllLen, NULL);