I'm told Eset (antivirus) gets most things including Cryptolocker,…and you don't want that!! We're getting about 4 a week, some very convincing. Lynn's just had one supposedly from HMRC, then there's Barclays, everyone under the sun about the payment we've made or the invoice or the quote, not to mention those that are 'only looking for a kind hearted sensitive man and are waiting for my loving arms'. Bin the lot!! The Apple ones are very clever, but none have your name at the top.
Good luck with it.