Crypto exchange Bybit said it was hacked, resulting in what analysts estimate was the loss of almost $1.5 billion worth of tokens in the biggest theft ever committed in the industry. Researchers believe North Korean hackers were likely responsible.

Hackers stole about $1.5bn in crypto tokens from Bybit, in a heist the digital asset exchange described as the biggest theft to hit the industry. Ethereum coins were been taken from Bybit’s offline or “cold” wallet,

Bybit, one of the largest crypto exchanges in the world, said Friday that a hacker took control of one of its digital wallets holding ether and transferred all the tokens to an unidentified address. The attack resulted in more than $1.