Authorities are investigating a massive ransomware attack that reportedly hit more than 45,000 computers in 74 countries worldwide, including the UK's NHS England national health service, international delivery service FedEx, and Spanish telecom firm Telefonica. Security experts have linked the exploit to an earlier leak by the Shadow Brokers, who allegedly accessed a trove of hacking tools from the NSA. Based on early information, a number of organizations reported that they were affected by a ransomware attack linked to the Wanna Decryptor.