In recent years, disputes over territorial issues between Ukraine and Russia never stops, including the disputes over Crimean Peninsula, Russia-Ukraine gas disputes, and the conflict in eastern Ukraine. As the crisis between the two countries upgrades, security incidents in cyberspace may be more intense than the reality. During the Christmas Holiday of 2015, the Ukrainian power grid was attacked by a Russia-based cybergang, causing 1.4 million residents in western Ukraine to suffer from an outage in the cold. The whole city suffered a great panic and heavy losses. On the contrary, there were much fewer disclosures on the APT attacks against Russia.