Decentralized finance (DeFi) protocols Aave and Yearn Finance are suffering from an ongoing flash loan attack at the time of writing, Pechshield pointed out in a tweet. The exploiter has already drained over $10 million in stablecoins from the protocols, including over $3 million DAI, $2.5 million USD Coin (USDC), $1.7 million BinanceUSD (BUSD), $1.