Todays widely reported WannaCry ransomware attack is widespread, growing and has already yielded ~USD$12k in profits according to a Bitcoin Whos Who analysis of the BTC addresses involved. On May 12 the 3 bitcoin addresses known to be receiving extortion payments show receipt of 6.49372428 BTC in 39 separate transactions with ransom varying between .15 to .30 BTC each. None of the balances have been moved to new bitcoin addresses since receipt.
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http://bitcoinwhoswho.com/blog/2017/05/12/wannacry-ransomware-extorts-33-payments-worth-6-93-btc-so-far-today/It is showing up all over my news feeds as you pay $300 in Bitcoin or your data will be erased then woops your files have been encrypted 3 days to pay or else your price will be doubled.
It really sucks to be in the UK their hospital servers were broken into because they don't put much into security or updating but Bitcoin malware has been a known vector for a while the ones that bought the auction deal from the shadowbrokers knew how to maximize their return the problem is that the servers are not updated else this would not be as bad. This was an old FBI tool only hits non-patched pcs wannacry indeed.