It seems the initial wave has been stopped by Researchers, and then we had another one as detailed in the link below.
https://blog.comae.io/wannacry-new-variants-detected-b8908fefea7e
More good information and I suggest reading through it all if you have not done so already. This is a bad weekend for business and infrastructure that is using older systems, but its been a good weekend for the infosec community in coming together and helping and sharing alot of good information with each other.
There is a tool you can run on a host that will stop the ransomware from encrypting your machine, however it will still attempt to spread over your network.
This machine is running WCRYSLAP – then infected with the worm – worm still spreads, but RANSOMWARE dies in a fire https://t.co/JjYBi3Ua2y pic.twitter.com/UqXFwj13EV
— Hacker Fantastic (@hackerfantastic) May 14, 2017