I will be honest.
I am scratching my head here to try and not sound like a total dickhead.
I think you got most of the stuff kinda wrong.
Cryptolocker didn't attack only big people and big companies, every Joe Schmoe could get infected. Lockscreen wasn't there to keep you out of your files. What did was that, cryptolocker searched for files like .doc, .txt, .jpg, etc and then encrypted them. On everything that it had access to. Creators wanted money for providing decryption key to decrypt those files. Locking screen was more of an information than real problem.
Cryptolocker was doing what I am doing, encrypting my files. Difference was, in case of CL you don't have key to decrypt those.
Link you provided from askleo.com pretty much states the same.
As of today, CL is pretty much dead.
Doesn't mean there aren't clones of it.
Ransomware encrypts your files, even if it is located in windows folder, after encryption you can't do anything until you have the key. Removing ransomwere won't decrypt your files. That crappy lockscreen is more of an information than anything else.
And yes, there are things that try to "mimic" ransomware, using only lockscreen without any encryption (those are still ransomware, crappy, but hostage was taken
).
Bah, there are ones that get into your router that still does have default password and changes DNS so whatever site you are trying to access won't work (no matter the device as long as it uses same router). Taking your internet hostage
Also, searching for files in windows folder? If I wanted to lock someone out of being able to login with winlogon I would just edit registry entries.
That's pretty much all to it.
Also, as of this deep web stuff... Are we talking about onion sites? Because that gives another problem. That site should be listed somewhere, wouldn't mind address for it. If it's not listed, then where did you get address without being part of it? Those aren't cookies to be given out on every occasion.
I am sorry for being super skeptical here, but it looks like "I heard something, I don't fully get it, but ok.". Things like that can easily create more havoc. I don't think you are trying to show off your knowledge or spread disinformation, but lots of it doesn't hold together from security perspective. Sounds more like script kiddies ideas.
This is why I am doubting source of your information.
Did I sound like a dick? I hope not, because that wasn't my intention.