The Korea Internet & Security Agency (KISA) launched an on-site investigation into YES24, the largest online bookstore in Korea, two months after it suffered a ransomware attack in June.
According to the industry on the 11th, KISA began its on-site investigation into YES24 that day.
YES24 announced that it was under attack from external ransomware around 4:30 a.m. that day, making access to services impossible. Currently, YES24's website and app are not accessible.
YES24 noted, "In preparation for any possible risks, we are currently urgently blocking the system to prevent additional damage and are implementing security checks and defensive measures," adding, "We are in the process of quickly restoring services using backup data."
Earlier, YES24 experienced a ransomware attack in June, which paralyzed its internet communications network, and it began to gradually resume services starting on the 13th of the same month, just five days after the system went down.