U.S.-based blockchain intelligence firm TRM says a North Korean hacking unit was likely behind a massive theft incident at Binance. The world’s biggest cryptocurrency exchange reported Thursday that approximately $6.3 billion was impacted in an apparent hack. The company has worked with blockchain partners to freeze affected assets, with roughly $3 billion frozen. TRM attributes the attack to TraderTraitor, North Korea’s elite hacking unit. The hack moved about $6.36 billion out of Binance wallets on 10 blockchains, it says, making it the largest cryptocurrency theft on record. Another blockchain analysis firm, Chainalysis, also believes the Binance hack was likely done by TraderTraitor.