Washington took “final” measures to cut off a Cambodia-based finance company from the U.S. financial system on Tuesday, seeking to eliminate a “critical node” in North Korea-linked cryptocurrency laundering.

The U.S. Treasury’s Financial Crimes Enforcement Network (FinCEN) issued a “final rule” on Tuesday targeting Phnom Penh-based Huione Group, a financial services network accused of funneling proceeds from cyber heists carried out by the DPRK and transnational criminal organizations.