Crypto exchange Binance suspended withdrawals after elite hackers stole a staggering $6.3 billion in digital assets, marking what may be the biggest crypto heist of all time.

Researchers at the crypto research firm TRM Labs told the New York Times that they have “high confidence” in its assessment that the theft was the work of “North Korea’s elite hacking unit.” It reportedly took just 20 minutes to drain Binance of billions of dollars in crypto.

Binance said that it was able to work with its partners to freeze about $3 billion in assets. TRM, however, estimates that around…