This article aims to shed light on the concept of ‘cyber terrorism’ by examining various issues related to crimes committed in cyber space. To achieve this task, we first delve into the notions of ‘what motivates individuals and groups in using cyber space for terrorist purposes’ and ‘what kinds of methods they use to achieve those purposes.’ In all discussions, a spesific emphasis is placed on the ‘social media.’ Second, benefiting from a Turkish case (i.e., Redhack group), we explore the ways in which the conundrum of ‘hactivism or terrorism?’ could be made more intelligible or, hopefully, solvable. Third, we describe both Turkish and international efforts on cyber terrorism. Finally, based on the convergence of theory and practice, we present some reccommendations in terms of responding cyber terrorism.