WannaCry is believed to be the most massive ransomware delivery campaign to date. In just a few hours, the ransomware targeted over 45,000 computers in 74 countries, including United States, Russia, Germany, Turkey, Italy, Philippines and Vietnam. In separate news, researchers have also discovered a massive malicious email campaign that’s spreading the Jaff ransomware at the rate of 5 million emails per hour and hitting computers across the globe. The Jaff Ransomware is using a Windows exploit harvested from the NSA, which was dumped by the Shadow Brokers hacking group.
Source: https://thehackernews.com/2017/05/wannacry-ransomware-unlock.html