DNV said today it is still working to ensure its ShipManager software’s servers can be put back online as soon as possible after the cyber-attack which affected 1,000 vessels operated by 70 customers.

The major class society ShipManager software was the victim of a ransomware cyber-attack on the evening of Saturday 7 January which led to it taking the servers offline.

Users can still use the onboard, offline functionalities of the ShipManager software and DNV said there are no indications that any other software, data or services have been affected.

DNV said its experts are working closely with global IT security partners to investigate the incident and to ensure operations are online as soon as possible.

It is also in dialogue with the Norwegian police about the incident, and DNV said it was communicating daily with those affected to update them on its forensic investigation findings.

DNV acquired Amsterdam-based industrial cyber security specialist company Applied Risk in November 2021 as it moved to scale up its cyber security business.

It is the second classification society to have to shut down some IT servers in response to a cyber attack in the last couple of years. Bureau Veritas was hit in late 2021.

DNV maritime chief executive Knut Orbeck-Nilssen said last October it was important to share information about cyber attacks so the industry could better learn how to protect itself from them.