The TTC said in a statement that the compromised data includes the names, addresses and Social Insurance Numbers of up to 25,000 employees “past and present.”

TTC CEO has apologized for this, but has refused to reveal whether the TTC paid the cybercriminals any ransom to restore its services.

The ransomware attack resulted in a number of the TTC’s servers being encrypted and locked which took down a communications system used to communicate with vehicle operators as well as other important systems.

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