ok,, first of all your safe on Mac, Macs can't read can't read these types of files anyway.
Scanning your windows stuff from mac is a good idea too. In future, you may want to try these :-
http://anonym.to/?http://download.bitdefender.com/removal_tools/BDAntiCryptoLocker_Release.exe
http://www.foolishit.com/vb6-projects/cryptoprevent/
or just keep the VM as "isolated", and/or just be vigilant
The warning that a zip file was received in Apple mail, or any email program in itself, should set of alarm bells. I'd would be asking "Where did it come from?" and "Who sent it?" "Is it something i'm expecting" ?
Usually you can actually pay the ransom in bitcoins, and they WILL decrypt the files.. So, i would actually say its legit, because they are not trying to fool you. They are giving what you asked . That is, your files.
However, since you have a backup, that would be easier, just hope you have more than one copy....
Whichever direction you look, it all starts with the user who opened the attachment in the first place.
Last edited: Dec 25, 2013