
In mid-April, an arsenal of powerful software tools apparently designed by the NSA to infect and control Windows computers was leaked by an entity known only as the “Shadow Brokers.” Not even a whole month later, the hypothetical threat that criminals would use the tools against the general public has become real, and tens of thousands of computers worldwide are now crippled by an unknown party demanding ransom.
The malware worm taking over the computers goes by the names “WannaCry” or “Wanna Decryptor.” It spreads from machine to machine silently and remains invisible to users until it unveils itself as so-called ransomware, telling users all their files have been encrypted with a key known only to the attacker and that they will be locked out of the files until they pay $300 to an anonymous party using the cryptocurrency Bitcoin. The ransom rises to $600 after a few days; at some point thereafter, if no ransom is paid, the user’s files are deleted. The hackers have provided a handy countdown clock to let victims know exactly how much time they have left.