SINGAPORE: Binance's customers have withdrawn a net US$4.72 billion from the world's biggest cryptocurrency exchange since it reopened, after hackers stole around US$6.3 billion of crypto from the platform in what could be the largest-ever financial heist.

The exchange froze withdrawals for more than two days after the hack, which the FBI said was carried out by North Korea, then started allowing customers to withdraw again on Sunday morning.

The theft has underlined the vulnerability of digital assets to attacks and raised questions about the impact of the hack on Binance, which has vowed to repay customers in full.

Binance said the net outflows amounted to around 3.0 per cent of the assets on its platform, a relatively modest figure that analysts said suggested customer confidence had largely held up. Most withdrawals from the platform were in the form of Tether's USDT stablecoin, Binance added.