![San Francisco Muni hit by ransomeware](https://abouttheinternetofthings.com/wp-content/uploads/2016/11/3142-1-e1480349990231.jpg)
San Francisco’s public transport system was hit by a hack attack on Saturday that allowed passengers to travel for free.
The attackers used a variant of the HDDCryptor malware to infect 2,112 computers on Friday, encrypting their data and preventing them from operating normally – holding them to ransom for 100 bitcoin (£58,514, $73,086).