Hydra is a Windows virus that displays a message box. When you close a message box, 2 more will show up.
This virus was implemented using Visual Basic and .NET 4.7.1.
Demo: https://youtu.be/2Nk8loSs02c
Note that this virus is harmless 🙂 If you know how to make it more annoying (for example: Task Manager can't shut it down), feel free to contact me
(so that means Task Manager is Captain America 🤔)