Aluminum Maker Hydro Battles to Contain Ransomware Attack

The headquarters of aluminum producer Norsk Hydro are seen in Oslo, Norway March 19, 2019. NTB Scanpix/Terje Pedersen via REUTERS

OSLO, Norway—Norsk Hydro, one of the world’s largest aluminum producers, battled on March 19 to contain a cyber attack which halted parts of its production, the latest example of the damage hackers can cause to business and industry.