The US Treasury placed sanctions on three North Korea-linked hacking groups, the Lazarus Group, Bluenoroff, and Andarial. Lazarus Group is also considered the threat actors behind the 2018 massive WannaCry attack. The groups are behind several hacking operations that resulted in the theft of hundreds of millions of dollars from financial institutions and cryptocurrency exchanges worldwide and destructive cyber-attacks on infrastructure. The three groups likely stole $571 million in cryptocurrency from five Asian exchanges in 2017 and 2018.”]
Source: https://securityaffairs.co/wordpress/91208/hacking/us-treasury-north-korea-sanctions.html