On the South Korean nuclear power plant detected a non-dangerous worm

A week ago, the South Korean state-owned company Korea Hydro and Nuclear Power Co. (KHNP), which manages 23 nuclear power units, reported on the hacking of the corporate network. Actually, it was obvious and without an official statement, because hackers tweeted documents with plans for NPP floors and other classified information, drawings of Shin-Kory-i Wolson-1 nuclear power units, operation manuals, ventilation systems and systems cooling

KHNP immediately stated that the published information "does not apply to key technologies and does not threaten reactor safety." The State Commission began investigating the incident, and KHNP began two-day cyber attacks to counter a possible cyber attack.
')
The study of computers on the local network brought an unpleasant surprise : it turned out that a flash drive with a trojan was connected to one of the computers disconnected from the Internet that controls the nuclear reactor. Fortunately, the trojan was not dangerous: it is an ordinary virus that spreads on the Internet and is not aimed specifically at nuclear power plants. No evidence was found that he caused any harm to the system.