South Korean government sites were targeted by DarkSeoul gang on June 25. Attacks were a retaliatory move prompted by similar attacks by Anonymous against North Korean targets. Most of the websites had been recovered and restored to normal operation by the end of the day. There are lessons to be learned that might help prevent your network and servers from being compromised. Companies are often slow, and governments–as a function of their bureaucracy and red tape–are even slower to test and deploy patches as they’re released.”]
Source: https://www.csoonline.com/article/2137102/south-korean-cyber-attack-targeted-unpatched-systems.html