mbw_novac.cs

/*
The MIT License (MIT)
Copyright (c) 2015-2018 IllidanS4
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;

namespace mbw_novac
{
	class Program
	{
		[DllImport("kernel32.dll")]
		static extern IntPtr OpenProcess(ProcessAccessFlags dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, int dwProcessId);
		
		[DllImport("kernel32.dll", SetLastError = true)]
		static extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, byte[] lpBuffer, uint nSize, out IntPtr lpNumberOfBytesWritten);
		
		[DllImport("kernel32.dll", SetLastError = true)]
		static extern bool ReadProcessMemory(
			IntPtr hProcess,
		    IntPtr lpBaseAddress,
		    [Out] byte[] lpBuffer,
		    int dwSize,
		    out IntPtr lpNumberOfBytesRead
		   );
		
		[DllImport("kernel32.dll")]
		static extern Int32 CloseHandle(IntPtr hProcess);
		
		static readonly Dictionary<long, IntPtr> addrMap = new Dictionary<long, IntPtr>{
			{5361664, (IntPtr)0x0087C30C},
			{5359616, (IntPtr)0x0087B30C},
		};
	
		public static void Main(string[] args)
		{
			var ass = Assembly.GetExecutingAssembly().GetName();
			Console.WriteLine("M&B: Warband VAC Disable v"+ass.Version.ToString(2)+" by IllidanS4 ([email protected])");
			
			var proc = Process.GetProcessesByName("mb_warband").FirstOrDefault();
			if(proc == null)
			{
				Console.WriteLine("mb_warband.exe is not running.");
			}else{
				var file = new FileInfo(proc.MainModule.FileName);
				IntPtr ptr;
				if(!addrMap.TryGetValue(file.Length, out ptr))
				{
					Console.WriteLine("Unrecognized mb_warband.exe size, do you want to continue? (Y/N)");
					char ch = Char.ToUpper(Console.ReadKey(true).KeyChar);
					if(!(ch == 'Y' || ch == 'Z'))
					{
						Console.WriteLine("Quitting...");
						return;
					}
				}
				var hProc = OpenProcess(ProcessAccessFlags.All, false, (int)proc.Id);
				try{
					IntPtr tmp;
					byte[] buffer = new byte[1];
					ReadProcessMemory(hProc, ptr, buffer, 1, out tmp);
					if(buffer[0] != 1)
					{
						Console.Write("Unrecognized version");
						if(buffer[0] == 0)
						{
							Console.WriteLine(" / VAC is already turned off.");
						}else{
							Console.WriteLine(".");
						}
					}else{
						buffer[0] = 0;
						WriteProcessMemory(hProc, ptr, buffer, 1, out tmp);
						Console.WriteLine("VAC disabled.");
					}
				}finally{
					CloseHandle(hProc);
				}
			}
			Console.ReadKey(true);
		}
		
		[Flags]
		enum ProcessAccessFlags : uint
		{
		    All = 0x001F0FFF,
		    Terminate = 0x00000001,
		    CreateThread = 0x00000002,
		    VMOperation = 0x00000008,
		    VMRead = 0x00000010,
		    VMWrite = 0x00000020,
		    DupHandle = 0x00000040,
		    SetInformation = 0x00000200,
		    QueryInformation = 0x00000400,
		    Synchronize = 0x00100000
		}
	}
}