CABRERA: First the good news, the cyberattack that hit 99 countries and more than 75,000 computers have been halted. The bad news, cyber experts warn there could be a reboot. Hackers hit hospitals, government offices and major companies all around the world yesterday with a Ransomware called "wannacry." A hospitals and emergency rooms, this is what happened. Phone stopped working, appointments got moves, ambulances got redirected, hackers demanded payment to make all of these stop. I want to bring in CNN correspondent Claire Sebastian joining us here New York. Claire, how did the hacker pull this off?</s>CLAIRE SEBASTIAN, CNN CORRESPONDENT: Well,</s>CABRERA: I am so guilty of seeing those updates and just ignoring them for quite some time because I don't want to stop what I'm doing and, you know, take the time to do the updates. So how did this all get halted? What stopped it? It was an accident.</s>SEBASTIAN: Yes. An extraordinary. Apparently, it was a 22-year-old private security researcher in the UK who was simply looking into this. And he discovered that essentially for the Malware to spread it had to communicate with an unregistered domain. Now,</s>CABRERA: So it sounds like that those impacted were big businesses, governmental entities, hospitals, universities, I heard something about gas stations taking a hit in some ways, but for individuals, do we need to worry about if there is a reboot? Do we need to do -- take any action?</s>SEBASTIAN: I think this is a real wake-up call. A lot of cybercrime is exploiting human imperfection, human trust. We know that you shouldn't be open emails with unverifiable attachments. We know you shouldn't go on to suspicious website. This is about actually doing something. I know it is</s>CABRERA: Claire Sebastian, thank for that good reminder to all of us. Still ahead, a parading podium. In a runway, press secretary, take a look closer. It is "Saturday Night Live" with a Washington twist. You are here in the CNN NEWSROOM.
Cyberattack That Hit 99 Countries And More Than 75,000 Computers Have Been Halted