On June 23, someone was able to steal assets from the bridge that they then converted to more than 85,800 ETH. The stolen funds are notionally valued at almost $100 million, assuming the thief can cash them out successfully. Hours after the attack, most of the funds remained in the thief's wallet and had not yet been laundered.
A June 29 analysis by blockchain research firm Ellipsis claimed that "there are strong indications that North Korea’s Lazarus Group may be responsible for this theft". Lazarus was also behind the $625 million bridge hack in March, targeting the Axie Infinity game.