KuCoin suffered a September 2020 exchange breach that moved more than 11,470 ETH and over 150 Ethereum-based tokens to attacker-controlled wallets, with total losses reported above $150 million. Uppsala Security focused on wallet 0xeB31973E0FeBF3e3D7058234a5eBbAe1aB4B8c23 and traced stolen assets through decentralized and centralized exchanges including Uniswap, Binance, OKEx, and Tokenlon. One flow sent funds through proxy wallet 0x1c3f856719a91735ccb78506bd504b17907ac814 before splitting into three wallets and swapping SNX for ETH. At publication time KuCoin said suspects had been identified and law enforcement was involved, while the main hacker wallet still held more than $90 million in cryptocurrency.