Binance, the world’s largest cryptocurrency exchange, confirmed Thursday that it had been hacked in a $6.3 billion cyber heist that blockchain investigators are blaming on North Korea.

The company pledged to cover all losses and said it is temporarily suspending deposits and withdrawals while its team works to address the hack.

Early Friday, the company said it had managed to freeze just under half of the stolen assets, or around $3 billion.

According to the company’s initial investigation, the breach “may involve a compromised DevOps engineer’s laptop, which allowed an attacker to gain access to a service container and submit unauthorized withdrawal transactions.”

Binance said it has found “no evidence of any wallet…