TOKYO — Japanese defence contractor Mitsubishi Heavy has been hit by over 50 separate computer viruses in a series of cyber attacks so far this year, a report said Monday.
One of the infected computers contracted 28 types of virus, including ones that could have been prevented with existing anti-virus software, the Yomiuri Shimbun said, amid concerns over the security of defence information.
The defence ministry plans to tell Mitsubishi Heavy to file detailed reports on its cyber security measures, the newspaper said.
Mitsubishi Heavy is analysing 83 computers hit by the attacks and has found more than 50 kinds of viruses, significantly more than the eight strains that the company announced on September 19, the newspaper said.
The company declined to comment for the Yomiuri story, citing an ongoing police investigation, while Mitsubishi officials could not be reached on Monday — a national holiday — for immediate comment.