CMA CGM has confirmed it has become the latest liner to suffer a cyber-attack. The company stated that it is currently dealing with a cyber-attack impacting peripheral servers. A number of the group’s websites have been down for large parts of Monday.

“As soon as the security breach was detected, external access to applications was interrupted to prevent the malware from spreading,” CMA CGM stated in a statement.

The Marseille headquartered firm is understood to have been hit by a threat known as ransomware which paralysed much of its IT infrastructure.

Ragnar Locker is a ransomware that affects devices running Microsoft Windows operating systems. It was initially detected late last year. Victims of the malware to date include Portugal’s leading electricity company and American travel management firm, CWT, the latter paying hackers $4.5m in July to retrieve sensitive data.

“An investigation is underway, conducted by our internal experts and by independent experts,” CMA CGM stated, adding that it would provide further updates on the situation.

The website of Cosco Shipping, China’s state-backed container line and a fellow member of the Ocean Alliance, also went down for around two hours on Monday, although it was back up before the end of the day.

CMA CGM is the world’s fourth largest liner, with the top three, Maersk, MSC and Cosco, also suffering cyber-hacks in recent years, leading to massive losses.