Glad that everything is ok with your system and it wasn't the real thing-
I had a issue of the same resemblance to yours a few weeks ago-
It was the FBI Virus. Insisting that I pay a fee and a few other details I have forgotten since.
My system is fine and I didn't find any files corrupt--
Agreed; it is a scare tactic of some sort-
One of our Guru's: Jefro just posted an article about this:-
I think a public key is needed to infect and w/o it I don't think security is so easily breached.
Someone would have to be well rounded in decryption among other nasty skills to get in-
Correctly encrypting the files on a computer is a safe form of protection, because the process does not depend on the integrity of the operating system after the encryption takes place.
http://www.linuxjournal.com/article/6481