DLL Injector

A simple and straightforward DLL Injector for Windows, written in C++. This project demonstrates how to inject a DLL into a target process using Windows API functions such as OpenProcess, VirtualAllocEx, and CreateRemoteThread.

Features

• Injects a custom DLL into a running process by its name.
• Uses basic Windows API functions for memory allocation and thread creation in the target process.
• Easy to understand and extend for educational purposes.

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Prerequisites

• Windows OS: This project is designed for the Windows operating system.
• C++ Compiler: Ensure you have a C++ compiler like GCC (MinGW) or Microsoft Visual Studio.
• Administrator Privileges: Required to inject the DLL into processes with elevated permissions.

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Usage

1. Clone the Repository

git clone https://github.com/andrei2308/Dll-injector.git
cd Dll-injector

2. Compile the Code

DLL Compilation

Save your DLL code (e.g., example_dll.cpp) in the same directory and compile it as a DLL.

Using MinGW:

g++ -shared -o example_dll.dll example_dll.cpp -luser32

Using Visual Studio:

1. Create a new project for a Dynamic Link Library (DLL).
2. Add your example_dll.cpp file to the project.
3. Build the project to generate example_dll.dll.

Injector Compilation

Compile the injector executable.

Using MinGW:

g++ -o injector.exe injector.cpp

Using Visual Studio:

1. Create a new project for a Console Application.
2. Add injector.cpp to the project.
3. Build the project to generate injector.exe.

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3. Run the Injector

Identify the Process ID (PID) of the target process:

1. Open Task Manager (Ctrl+Shift+Esc) and locate the process.
2. Note its PID from the Details tab.

Run the injector with the path to your compiled DLL and the target PID:

injector.exe <path-to-dll> <process-name>

Example:

injector.exe C:\path\to\example_dll.dll 1234

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How It Works

1. The injector opens the target process using OpenProcess.
2. Memory is allocated in the target process using VirtualAllocEx.
3. The DLL path is written into the allocated memory using WriteProcessMemory.
4. A remote thread is created in the target process to execute LoadLibraryA and load the DLL.

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Notes

• Error Handling: Make sure the injector is run with the appropriate permissions. Administrator rights may be needed for some processes.
• Antivirus Warnings: This program may be flagged by antivirus software. Use responsibly.
• 32-bit vs 64-bit: The architecture of the injector, DLL, and target process must match (e.g., all 64-bit or all 32-bit).

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License

This project is licensed under the MIT License. See the LICENSE file for more information.

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Disclaimer

This project is intended for educational purposes only. Use it responsibly and ensure you have permission before injecting a DLL into any process.

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