(Reuters) – Norsk Hydro ASA, one of the world's largest manufacturers of aluminum, will postpone its income statement for the first quarter by more than a month as it struggles to recover from a march-cyber attack, the company said on Friday .  Hydro is now aiming to publish its results on June 5, five weeks later than planned, as it attempts to access administrative systems for reporting, billing and billing that were blocked by hackers who demanded ransom.
The company has retained it will not pay to regain access to their computers and servers, instead of repairing data from backup systems.
"The revised date is conditional on the planned timeline for restoring operational and reporting systems," Hydro said in a statement. [1
"We are well on our way, but it takes time before we are completely back to normal IT business," he added.
Previously, Hydro had planned to report quarterly results on April 30.
The company was forced to put some production on March 19 and switch other units to manual operation after hackers blocked their systems.
As for the output, most operations go back to normal or near normal levels after the attack, with Extruded Solutions, the most affected segment running at 85-90% capacity, the company said.
When Hydro's primary metal and rolled product segments ran as usual, they still need a higher degree of manual operation, it added.
The attack, which the company said began in the United States, struck IT systems over most of its activities and initiated mandatory personnel to issue social media updates.
The National Security Authority, the state body responsible for cyber security, has said the attack used a virus called LockerGoga, a relatively new strain of so-called ransomware, which encrypts data files and requires payment to unlock them.