Unknown Detection Party

A Minecraft Cheat in C++

Nothing big, just a small intro for (s)kids wanting to make C++ injection clients (and no, this doesn't involve any Java code)

The code is a mess, I already know, so don't bother ripping into me. I don't like C++, I don't aspire to be good in C++, I just do what works, and I never intend to make anything commercial either, so it really doesn't matter to me

Happy skidding!

Getting Started With a Fresh Project

You can either follow the text instructions below or follow them via video.

• If you haven't already, install Visual Studio (If you already have a x64 C++ compile setup, just use that, but the next few steps will be for VS)
• Start VS, and create a new project. Make sure to select Visual C++ >> Windows Desktop >> Dynamic-Link Library (DLL) as the project type. Give it a name and location, and create it
• You can probably just delete the file it creates named <your_project_name>.cpp as you'll either create another later, or do everything in the dllmain.cpp file
• Now that you have a base location for your project, locate your JDK installation (Somewhere around C:\Program Files\Java\jdk1.8.0_xxx\)
• Locate the jvm.lib library inside the JDK installation (.\lib\jvm.lib)
• Locate the jvm.dll dll inside the JDK installation (.\jre\bin\jvm.dll)
• Copy the two located files into your project's code directory (.\Project Name\Project Name\, it should be the place where all the .cpp and .h files are)
• Head back to VS, click Build >> Properties in the toolbar at the top
• Switch the "Platform" to (if it's not already) x64 since Minecraft runs in 64bit, and your DLL just won't work otherwise
• In the left panel, open VC++ Directories. It should be the third one down (unless I'm just special)
• Click in the first entry field: Executable Directories, and click the dropdown on the right, then <Edit...>
• Click the first icon in the top left to create a new entry (do this twice, once after the first)
• For the first one, put the following: <JDK install>\include, and for the second: <JDK install>\include\win32
• Now, in the panel on the left, open the Linker node, and open Input.
• Just like the dependencies, click the Additional Dependencies entry field, click the dropdown, edit, and then enter jvm.lib and click ok
• Next, in the dllmain.cpp file, put the following:

  //Required libraries
  #include <Windows.h>
  #include <iostream>
  
  /*
  	Handle the base injection in the newly created thread (if injection was successful)
  	Allocates a new console window to the application and routes stdin, stdout, and
  	stderr to the console. This prevents any debugging being mixed in with Minecraft's
  	output window
  */
  void inject() {
  	AllocConsole();
  	FILE* fIn;
  	FILE* fOut;
  	freopen_s(&fIn, "conin$", "r", stdin);
  	freopen_s(&fOut, "conout$", "w", stdout);
  	freopen_s(&fOut, "conout$", "w", stderr);
  
  	std::cout << "Injection Successful!" << std::endl;
  }
  
  /*
  	Entry point function for the DLL
  	If it has just been attached, create a new process thread and run the "inject" function
  */
  BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {
  	if (fdwReason == DLL_PROCESS_ATTACH)
  		CreateThread(nullptr, 0, (LPTHREAD_START_ROUTINE)inject, nullptr, 0, nullptr);
  	return TRUE;
  }

• Change the compile mode at the top of Visual Studio to x64, and build the DLL (Ctrl + Shift + B)

You should now have a built DLL to inject straight into Minecraft, and watch the magic unfold!

Disclaimer

The code is shit, there's countless things I could do to improve the functionality (including toggle for the aimbot), but I really couldn't care less, so don't bother saying it's shit cause I'll just screenshot this disclaimer and link you to Chum Drum Bedrum