The article discusses Russian information warfare focusing mainly on propaganda issues, which were used during the conflict in Ukraine, and tries to find an answer to the question of to what extent these undertakings are dangerous to Euro-Atlantic security. It provides a political background of the conflict in order to better understand why Russia is using particular information warfare tools. The article analyzes manipulation techniques and the use of specific elements of Russian identity such as the attitude to history and the role of the Orthodox Church. Finally, it discusses a possible influence these actions may have on security and stability of the EU and NATO and their particular member states.