Black Friday was a dark day for San Francisco’s Municipal Transportation Agency, as an apparent crypto-ransomware infection spread across the Muni system’s networks, taking down ticketing for Muni’s train stations and systems used to manage the city’s buses. The operator of the ransomware demanded $73,000 in exchange for restoration of Muni’s data, according to a report from the San Francisco Examiner.
On Friday and Saturday (November 25 and November 26), Muni train stations’ gates were open—with ticket machines displaying “out of order” messages, passengers were allowed to ride for free.
Source: http://arstechnica.com/security/2016/11/san-francisco-muni-hit-by-black-friday-ransomware-attack/