Minesweeper Cheat

Introduction

A game cheat for Microsoft Minesweeper. It will change the window title to "Mlnesweeper" if the current block has a mine.

Getting Started

Prerequisites

• Install MASM32.
• Set the PATH environment variable.

Building

Run the build.ps1 file directly:

PS> .\build.ps1

The cheat.dll will be generated in the bin folder.

Usage

The project has been only tested with the provided game version.

The MD5 of Minesweeper.exe is 9C45D38B74634C9DED60BEC640C5C3CA.

The cheat.dll must be injected into the game to activate its function. You can directly use this simple injection tool: Dll-Injector.

Dll-Injector Minesweeper cheat.dll

The window title will become "Mlnesweeper" if the current block has a mine.

Reverse Engineering

Graphic

Microsoft Minesweeper uses the BitBlt function to draw its mine area.

0x01005334 and 0x01005338 are the addresses of the mine area's width and height. When the game executes at 0x01002700 for the first time, the mine area is empty.

The stack is shown as below:

According to the declaration of BitBlt, the pixel coordinate of the top-left corner of the mine area is (12, 55). And the side length of a block is 16.

BOOL BitBlt(HDC hdc, int x, int y, int cx, int cy, HDC hdcSrc, int x1, int y1, DWORD rop);

Mine Data

At 0x01002669, the game reads mine data from 0x01005340.

For the following mine area:

The data around 0x01005340 are organized as:

It is clear that each 0x8A means a mine and 0xCC is the activated mine.

License

Distributed under the MIT License. See LICENSE for more information.