The Onslow Water and Sewer Authority (ONWASA) in Jacksonville, N.C. was hit with a ransomware attack over the weekend that has all but shut down its computer operations.

ONWASA, which is still recovering from the effects of Hurricane Florence, reported that its system came under attack from what it believes to be the EMOTET trojan on October 4, resulting in its system being overwhelmed about nine days later.

ONWASA’s IT department and an outside cybersecurity firm immediately went into action on Oct. 4, and it was believed at the time that the attack was fended off. However, on Oct. 13, in what may have been a delayed-action attack, Ryuk ransomware began attacking the system and encrypting its files. The utility’s IT staff attempted to stop the ransomware by disconnecting its network from the system, but this last ditch effort did not work.

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