AS THE WANNACRY ransomware epidemic wreaked havoc across the globe over the past three days, cybersecurity researchers and victims alike have asked themselves what cybercriminal group would paralyze so many critical systems for such relatively small profit? Some researchers are now starting to point to the first, still-tenuous hint of a familiar suspect: North Korea.

https://www.wired.com/2017/05/wannacry-ransomware-link-suspected-north-korean-hackers/