A quick update to notPetya – it’s still out there but it’s pretty easy to combat.  The first thing to do is update your computer and router to the latest version of AV, Systems updates and router firmware.  This will remove a great majority of your surface area.  notPetya esssentially travels on open ports to the internet, so it might be worthwhile to give your routers and firewalls a once-over to see if you’ve got any open ports specifically opened.  Most of the time you won’t.

From there it’s just following good data hygeine.  For the deep-dive, the register has the best writeup of how the virus works:

https://www.theregister.co.uk/2017/06/28/petya_notpetya_ransomware/?page=1