Its ambassador to the UN accused Washington of opting for “political, economic and military confrontation”.
President Donald Trump said the move was nothing compared to what would have to happen to deal with North Korea.
The UN sanctions are an attempt to starve the country of fuel and income for its weapons programs.
The new measures restrict oil imports and ban textile exports, and were approved after North Korea’s sixth and largest nuclear test earlier this month.
North Korea’s ambassador to the UN Han Tae Song said he “categorically rejected” what he called an “illegal resolution”.
“The forthcoming measures by DPRK [the Democratic Republic of Korea] will make the US suffer the greatest pain it has ever experienced in its history,” he told a UN conference in Geneva.
“Instead of making [the] right choice with rational analysis… the Washington regime finally opted for political, economic and military confrontation, obsessed with the wild dream of reversing the DPRK’s development of nuclear force – which has already reached the completion phase.”
The UN resolution was only passed unanimously after North Korea’s allies Russia and China agreed to softer sanctions than those proposed by the US.
The initial text included a total ban on oil imports, a measure seen by some analysts as potentially destabilizing for the North Korean regime.
The new sanctions agreed by the UN include:
A proposed asset freeze and a travel ban on Kim Jong-un were dropped.
Reacting on September 13, President Donald Trump said: “We think it’s just another very small step, not a big deal.”
“I don’t know if it has any impact, but certainly it was nice to get a 15 to nothing vote. But those sanctions are nothing compared to what ultimately will have to happen,” the president added, without giving details.
The US ambassador to the UN Nikki Haley told the Security Council after the vote: “We don’t take pleasure in further strengthening sanctions today. We are not looking for war.”
“The North Korean regime has not yet passed the point of no return,” she added.
“If North Korea continues its dangerous path, we will continue with further pressure. The choice is theirs.”
The September 11 resolution against North Korea was the ninth one unanimously adopted by the UN since 2006.
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