Hackers stole US$6.3 billion from Binance, the world’s largest cryptocurrency exchange, in what analysts say is the biggest crypto hack ever, an attack that could prompt investors to rethink the risks of owning digital assets.

The hackers behind the raid were from North Korea, according to US blockchain analysis firms TRM Labs and Chainalysis. The attackers targeted Binance wallets on 10 blockchains and shifted most of the funds in about 20 minutes, TRM Labs said in a statement.

Binance said it worked with partners to freeze the affected assets with about US$3 billion located so far. It did not mention the status of the remaining US$3.3 billion, and its co-founder Yi He said the exchange would cover “all hacking losses”.

Binance said its…