The FBI referred to the attack as “TraderTraitor,” a malicious campaign linked to North Korean state-sponsored hackers the Lazarus Group.

Assets were stolen from Dubai-based cryptocurrency exchange Bybit earlier this month, in what's believed to be the largest-ever digital heist.

Cryptocurrency exchange Bybit said last week hackers had stolen digital tokens worth around $1.5 billion, in what researchers called the biggest crypto heist of all time.