[Skryptec]

1. You could try a reverse image search, if that comes up with nothing than there really isn't another way.
2. You can easily do a clean-up by checking out this simple guide: https://malwaretips.com/blogs/malware-re...r-windows/
3. You could use Wireshark to see what connections are being made, but it really isn't that simple of a tool to use.
4. If you physically harmed the person who done this, yes, you could face charges depending on how far the other person is willing to go.

Tools won't always remove it..