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.

Bybit, one of the world’s largest cryptocurrency exchanges, experienced a hack Friday in which over $1.4 billion worth of crypto was stolen, according to blockchain-analytics firms. It’s the latest incident for an industry struggling with security concerns that present hurdles to mainstream adoption.