Over the weekend, riders of San Francisco's public transit system got a nice treat...they didn't pay a cent to ride on Friday or Saturday.

Unfortunately this was not a charitable holiday promotion, but rather the result of malware which infected more than 2000 computers belonging to the San Francisco Municipal Transportation Agency.

For more on the outage, Take Two's Alex Cohen spoke with Kevin Montgomery; he wrote about the incident for Hoodline, a San Francisco focused publication, along with cybersecurity expert Clifford Neuman, director of USC Center for Computer Systems Security.