Die erste Veröffentlichung thematisiert die aktuelle Bedrohungen auf dem Internet, die Täter, Werkzeuge, die Strafverfolgung und den Incident Response. This document is addressed to persons entrusted with the protection of IT infrastructures and electronic information. The first part briefly outlines which threats currently exist, how they can be classified, and what perpetrators are behind them. The second part explains the foundations for establishing a CSIRT/CERT (Computer Security Incident Response Team / Computer Emergency Response Team). The last chapter presents the resources used by law enforcement authorities to crack down on botnets.