What is undown-tool?

Undown Tool is a Windows utility that targets Respondus LockDown Browser, software used by schools and universities to restrict what students can do on their computer during online exams. LockDown Browser blocks task switching, screen capture, and running other applications while an exam is open. This tool is described in the README as being for security research and educational purposes, to demonstrate that software-based restrictions can be worked around. The specific capabilities listed in the README include: switching between the locked browser and other applications (Alt-Tab), capturing screenshots while the browser is running, disabling the hooks the browser uses to detect blocked applications, and forcing other windows to remain visible on top of the locked screen. The project uses DLL hooking, a technique where code is injected into a running program to alter its behavior without modifying the program's files on disk. The tool runs on Windows 10 and 11. Installation, as described in the README, involves running a single command in CMD that downloads and installs components from an external URL. The README notes that the approach does not modify the core browser files, which it says reduces the chance of detection. The project is described as actively maintained. The README includes a disclaimer stating the tool should not be used to cheat on exams and that the author takes no responsibility for misuse.