"These actions are intended to stop the flow of illicit revenue to North Korea from overseas information technology workers disguising their true identities and hiding behind front companies, aliases, and third-party nationals," Treasury Secretary Steve Mnuchin said on Thursday.
The department designated the China-based China Silver Star, its North Korean CEO Jong Song Hwa and its Russia-based sister company Volasys Silver Star as such fronts, the Voice of America News reported.
"The US will continue to fully enforce and implement sanctions until we have achieved the final, fully verified denuclearization of North Korea," Mnuchin said.
They met face-to-face during their historic summit in June in Singapore.
On Wednesday, the Pentagon said the US and allies are days away from launching a new effort to more publicly expose North Korean violations of sanctions aimed at curbing its nuclear and missile programs, defence officials tell CNN.
The US has been using sanctions to maintain pressure on Pyongyang to give up its nuclear weapons and ballistic missile programme, even as it continues to engage in diplomacy.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)