The notorious WannaCry ransomware, which recently haunted computers around the globe, struck a local movie chain, industry watchers said Monday, causing alarm among South Korean companies.

A ransomware refers to malware that infects files in a computer until victims pay a certain amount of money to hackers. The latest ransomware, called WannaCry, first surfaced last week, damaging some 200,000 computers in 150 countries around the globe.

South Korea's major theater chain CJ CGV said some of its advertisement servers were hit by the ransomeware. A company official said its movies are still running as scheduled, and it is currently investigating the case.

Four South Korean companies have claimed to have suffered damage from the ransomware as of Sunday. (Yonhap)

A screen at a theater in Seoul is infected with the WannaCry ransomeware on May 15, 2017. (Yonhap)
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