Aluminum company Norsk Hydro has already lost as much as $40.6 million since it was attacked by LockerGoga ransomware on March 19, but at least most of its operations are back running at normal capacity, the company said in a news update yesterday.

Most of the financial damage, which Hydro estimated at between 300 million to 350 million Norwegian krones ($34.8 million - $40.6 million), is the result of lost margins and volumes in the company's Extruded Solutions business area, which was the most severely impacted by the incident.

As of yesterday, Extruded Solutions was operating at 70 to 80 percent in three of its units, but its Building Systems business unit "remains almost at a standstill," the company has reported. Hydro expects this unit will gradually ramp up activity as the week proceeds.

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