Washington’s allegations are merely a “baseless provocation” used to generate tensions between the countries, Pak Song Il, the North Korean ambassador for American affairs at the UN, told AP.
Pyongyang considers these claims an attempt to create an “extremely confrontational atmosphere,” the North’s top official stated. “If they are so sure, show us the evidence,” the envoy added.
Earlier in December, White House Homeland Security advisor Tom Bossert wrote an Op-Ed claiming that the US has proof that it was North Korea behind the WannaCry cyber-attack, citing a "careful investigation." Bossert named Pyongyang as the culprit in the attack, although no particular organization or person affiliated with the North Korean government was specifically named.
In May 2017, the global WannaCry cyber-attack targeted computers worldwide. During the attack, personal data was stolen from private users and ransom payment was requested in the form of bitcoin.
Following the ransomware attack, speculation emerged that North Korea may have played a significant role in the hack. Neel Mehta, a prominent Google security researcher, revealed a resemblance between the code used in what is said to be an early version of WannaCry ransomware, and that of a hacking tool attributed to the notorious Lazarus Group in a Twitter post.