More than 2,000 computer systems belonging to San Francisco 's public transit agency were hacked on Friday . San Francisco 's Metropolitan Transit Agency ( MUNI ) confirmed a computer attack against its fare systems , which caused it to close its kiosks and offer free rides over the Internet . Following the attack , station screens displayed a message that said , " You Hacked , ALL Data Encrypted . Contact For Key(cryptom27@yandex.com)ID:681 , 000 . Andy Saolis is a pseudonym commonly used in , which uses commercial tools to encrypt hard drives and network shares on Windows machines using randomly generated keys and then overwrite the hard disks' MBRs to prevent systems from booting up properly. " MUNI said it was investigating the incident and " working to resolve the matter " .
More than 2,000 computer systems belonging to San Francisco 's public transit agency were hacked on Friday . San Francisco 's Metropolitan Transit Agency ( MUNI ) confirmed a computer attack against its fare systems , which caused it to close its kiosks and offer free rides over the Internet . Following the attack , station screens displayed a message that said , " You Hacked , ALL Data Encrypted . Contact For Key(cryptom27@yandex.com)ID:681 , 000 . " MUNI said it was investigating the incident and " working to resolve the matter " .