“Our investigation has determined that the unauthorized actor was able to gain access to certain parts of our computer systems and was able to encrypt access to some data,” the Port said.

According to the Port, the ransomware attack was carried out by Rhysida, which claimed responsibility for cyberattacks on the British Library last year and the City of Columbus, Ohio this summer. It also targets hospitals and other government institutions.

The Port said that Rhysida claims to have stolen data and may post it “on their darkweb site” as a result of the refusal to pay the ransom.