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Keylogger-SetWindowsHookEx

A key- and mouse logger that uses Windows API hooks to capture the keystrokes and SetWindowsHookEx to install the procedures.

Installer

The installer will start a new thread and use SetWindowsHookEx to install the hook procedures. After that, it will start a message loop in that thread. This is done because in case the procedure and the target application have a different architecture (x86 and x64). In this case, the system executes the hook on the thread that called SetWindowsHookEx instead of in the target application.

Procedures

All hooks are installed globally because we want to capture the input to every process running on the system. Because of this, the procedures are located in a separate DLL.

Whenever a hook is triggered, the procedures will translate their function parameters to the actual keypress and log it to a file.

Demo

  1. Clone the repository:

    git clone https://github.com/BenteVE/Keylogger-SetWindowsHookEx.git

  2. Build the installer executable and the procedures DLL in Visual Studio.

  3. Run the installer

    ./keylogger_installer_x64.exe ./keylogger_procedure_x64.dll --keyboard-ll --mouse-ll

  4. Verify that the keylogger is working. All key and mouse presses should be logged to a file keylog.txt file on the desktop.

    Demo