vanhauser-thc/thc-hydra ? reverse-engineered prompt

Build me a tool for security testing, kind of like a proof-of-concept to show how easy it is to break into systems with weak passwords. It should be a really fast, parallel network login cracker. I want it to be able to try and brute-force a whole bunch of different services: things like FTP, SSH, RDP for remote desktops, web page login forms, email servers, and even databases like MySQL.

It should be a command-line utility at its core, written in C so it's performant. For options, I'd like to be able to point it at a single server, a whole network range, or a list of targets from a text file. And of course, I need to be able to feed it password lists. A simple graphical interface using GTK would also be great for people who aren't command-line wizards. Please also include a Dockerfile to make it super easy for anyone to run.