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.

Cryptocurrency exchange Bybit said on Friday that an attacker gained control of an ether wallet and transferred the holdings to an unidentified address. Ether cold wallet was the only one that was attacked and all other wallets of the exchange were unaffected and withdrawals were proceeding normally,