https://www.techdirt.com/articles/20170803/10585837913/guy-who-accidentally-stopped-wannacry-ransomware-detained-after-defcon.shtml

Update: He's been indicted for his alleged role in creating a different malware, Kronos. More below.

As you may recall, earlier this year, when the WannaCry ransomware was spreading like wildfire, it was accidentally stopped by a security researcher in the UK who was (mostly) known only by the pseudonym MalwareTech. He wrote about the whole experience after having tweeted about it earlier. Basically he spotted the domain that WannaCry was pinging and saw that it wasn't registered -- so he registered it, if just to track the spread of the malware. But, that process actually stopped WannaCry from spreading due to the way the ransomware was designed. The story of someone accidentally stopping a massive malware breakout was a good one and it was widely covered by the press. MalwareTech got lots of good press out of it... and as a thank you, at least one UK publication doxxed him and revealed his name, his age, some of his social media photos and even what he liked to eat. That wasn't very nice. Still, now it's known that Marcus Hutchens is MalwareTech, and people should be thanking him.