This isn't yet the cyberattack "the world isn't ready for" (https://www.nytimes.com/2017/06/22/technology/ransomware-att...), is it?
you will know when the big one hits because you won't be able to ask this question online and get an immediate answer.
[0] https://technet.microsoft.com/en-us/library/security/ms17-01...
[1] https://portal.msrc.microsoft.com/en-US/security-guidance/ad...