The world's second-largest crypto exchange Bybit suffered an exploit Friday that saw it drained of about $1.4 billion worth of ethereum and staked ether.

An outflow of 401,346.76 ETH worth $1.5B was noted by on-chain sleuth ZachXBT, which later turned out to be one of the most expensive hacks to date.

Bybit suffered one of the largest crypto thefts in history, with $1.5 billion stolen from its cold wallet during a routine transfer. The hack triggered a surge in withdrawals, as users feared Bybit might not recover. The crypto market also reacted negatively, with Ethereum dropping 6.7% and Bitcoin falling 3%.