Where did the original virus of Busan Bank come from? Zhihu.

According to Douban's and Zhihu's answers, it was mentioned in the phone that the company where the male owner worked saved the biological company that was on the verge of bankruptcy (the movie was wrongly translated into a cruise ship), but the virus was leaked by this biological company, which can correspond to the story that happened next to the biological company at the beginning of the story.