Over the weekend, developers behind the Optimism-based lending protocol Kokomo Finance appeared to conduct an exit scam after manipulating tokens on the protocol to steal $4 million in user funds.Exit scams are said to occur when developers or promoters of a cryptocurrency project appear to market a legitimate-looking project to investors, only to withdraw liquidity and erase all online or offline presence once a significant amount of money has been attracted to that project. Kokomo developers launched an attack contract cBTC from the main address of KOKO, Kokomo’s native tokens, on Sunday night. According to security firm CertiK, they then set the reward speed, paused a borrow feature, and created a malicious contract to interact with the rest of the protocol.