February 18, 2020 bZx loses $633,000 in a second attack.

Following the earlier weekend hack, at 3 AM UTC attackers again exploited flash loans and bZx’s price feed to steal $633,000 worth of ether. Like the first attack, the second made use of complicated DeFi transactions: the attackers took out a flash loan to purchase synthetic USD stablecoin (sUSD), subsequently posted as collateral for a bZx loan. The attackers then inflated sUSD’s price via the Kyber Network’s price feed and used the inflated collateral to payback the initial flash loan.