A cyberattack on Binance, the world’s largest cryptocurrency exchange, on Thursday has drawn fresh attention to cryptocurrency theft, with blockchain intelligence firm TRM Labs estimating that about $6.36 billion was transferred out of its wallets across 10 blockchains.

Most transfers took place within about 20 minutes. TRM Labs attributed the operation, with high confidence, to TraderTraitor, a North Korean hacking group.

Binance said its preliminary investigation pointed to a potentially compromised laptop belonging to a DevOps engineer.

In a statement on Friday, it estimated the impact at around $6.3 billion and said about $3 billion in affected assets had been frozen.

The exchange said user funds were safe, pledged to cover losses…