Investigators suspect the attack may have been carried out by TraderTraitor, a North Korean state-sponsored hacking group. And the back-and-forth is somewhat of a reversal of roles from 2022, when Zhao frequently wrote on social media about the now-failed crypto exchange FTX as it moved toward. Amidst the aftermath of a record $6 billion hack, Binance co-founder Changpeng CZ Zhao urged Elon Musk to cease mocking the incident.