Kim In Ryong, North Korea’s deputy ambassador to the United Nations, called the allegations ridiculous and unfounded. The North Korean diplomat was forced to speak after last week, three well-known cyber-security firms advanced a theory that North Korea was behind the WannaCry attacks. The three security firms, Kaspersky Labs, Symantec, and BAE Systems, didn’t blame the North Korean government directly, but a group of hackers known as The Lazarus Group, which has been linked to North Korea in past research reports.
Source: https://www.bleepingcomputer.com/news/security/north-korea-denies-involvement-in-wannacry-ransomware-outbreak/