The cyber world is integrated into the reality. There is a rapid technological change in weapons systems and the international security studies must focus on developing effective policies to avoid or diminish the economic and social harm of the cyber-attacks. With gradual encouragement, the users seek answers to their questions and become more and more entangled in terrorist related discussions. This is the way of personal indoctrination that occurs in the cyber space, often through the use of secure software. Through online platforms, terrorist organizations are also increasingly distributing propaganda aimed at encouraging extremism. The research paper aims to emphasize the most important tools for terrorist recruitment in the Cyber world and it provides some legal instruments and practices to fight against it. The study shows how cyber systems can be secured and thus become safe for the cyber world environment. The first section offers a short description of terrorism, its origins, the meaning and the general perspectives on cyber terrorism. The second section describes the most important terrorist groups and their recruitment activity in the cyber world. The next section provides a short perspective of the methods for counter-terrorism recruitment activity in the cyber world. The work ends with conclusions and gives suggestions for future research.