TTC investigating ransomware attack that knocked down some of its communications system

The Toronto Transit Commission says it is investigating a ransomware attack that knocked down some of its communications system and affected a number of its services Friday.

In a statement issued Friday evening, the TTC said the investigation was launched after an IT staff discovered “unusual network activity” Thursday night.

“Impact was minimal until midday today when hackers broadened their strike on network servers,” the agency said.

“This incident did not cause significant service disruptions, and there is no risk to employee or customer safety.”

However, the agency said the attack led to the loss of the TTC’s Vision system, which is used to communicate with vehicle operators, forcing them to utilize radio to contact Transit Control.