Crypto exchange BitoPro belatedly discloses $11.5 million hack

The Taiwanese cryptocurrency exchange BitoPro disclosed that they had suffered a theft from one of their hot wallets, which they said occurred during a system upgrade in which they were transferring assets between wallets.

The theft was originally noticed by crypto sleuth zachxbt, who observed a suspicious transfer of around $11.5 million in crypto assets on May 8. The funds sold on decentralized exchanges and then laundered through various cryptocurrency mixing services.

BitoPro originally only told customers that the platform was offline for "maintenance", but disclosed the theft on June 2 after zachxbt published his findings.

Cork Protocol exploited for $12 million

Cork Protocol, a defi project aimed at "tokenizing the risk of depeg events for stablecoins and liquid (re)staking tokens", suffered a $12 million loss after an attacker exploited a bug in how the project's smart contract calculated exchange rates. The attacker stole around 3,762 wrapped staked ETH (wstETH), which they exchanged for ETH. The project announced that they were investigating the theft and had paused markets.

Cork had been audited in whole or in part by four different security firms. The project's funders include Andreessen Horowitz, OrangeDAO, and Steakhouse Financial, and Cork is a part of Andreessen Horowitz's Crypto Startup Accelerator.