According to CoinDesk, Coinbase, the US cryptocurrency exchange, has successfully blocked "a complex, highly targeted, well-thought-out hacker attack." The goal of the attack is to enter the system of the exchange. Coinbase said the attack began on May 30 when more than a dozen employees received emails allegedly from the University of Cambridge Research Fund management staff. On June 17, an email contains a URL that, when opened in Firefox, installs malware that can take over someone's machine. Coinbase said, "In a few hours, Coinbase Security detected and blocked the attack."