Speaking at the United Nations headquarters in New York City, the Democratic People's Republic of Korea's deputy U.N. ambassador flatly denied Pyongyang played a part in last week's unprecedented cyberattack, dismissing suspicions raised recently by security researchers in the US and overseas.
But the North has now denied the claims, notably but not exclusively advanced by South Korean experts, and hit back Friday to accuse its opponents of spreading propaganda. He said North Korea would never abandon its "nuclear deterrence for self-defense and pre-emptive strike capability" even if the US ratchets up sanctions and pressure "to the utmost".
However, he has also said he is open to talks with Mr Kim.
Hong Seok-hyun, President Moon Jae-in's special envoy to the US, pays tribute at the Korean War Veterans Memorial in Washington, D.C. on Wednesday.
According to North Korea's official news agency, the missile flew 490 miles, but has a much higher potential range.
But there are questions over whether Pyongyang can miniaturise a nuclear weapon sufficiently to fit it onto a missile nose cone, or has mastered the re-entry technology needed to ensure it survives returning into Earth's atmosphere.
The message to the Seoul came less than 10 hours later after the DPRK publicly criticized the Moon government's response to its test-firing of the Hwasong-12 ballistic missile on Sunday.
The DFA said the Philippines has expressed "very grave concern" over the DPRK's latest missile launch.
The weekend launch was the first since a new liberal president took office in South Korea.
Kim accused the council of playing "to the tune of the USA again" and protested the Trump administration's demand for countries to choose allegiance between the United States and the Democratic People's Republic of Korea, his country's official name.
"It's obvious that (the two Koreas) can never achieve national reconciliation and improve inter-Korean relations while instigating fratricidal animosity and confrontation", the commentary said.