Norsk Hydro not yet able to restore stable operations after cyber attack

Norsk Hydro, one of the world's largest aluminium producers, has made progress in stabilising operations following a ransomware cyber attack that began late on Monday, the company said in a statement on Wednesday. Norsk Hydro on Tuesday confirmed the cyber attack.

Most of the company's IT systems were affected, many of them disconnected and switched to manual operations. The group's website was down on Tuesday morning.

"Hydro's technical team, with external support, has succeeded in detecting the root cause of the problems and is currently working to validate the plan and process to restart the company's IT systems in a safe and sound manner," it said. "However, it is still not clear how long it might take (to)restore stable IT operations," it added.