The annual DIMVA conference serves as a premier forum for advancing the state of the art in intrusion detection, malware detection, and vulnerability assessment. Each year, DIMVA brings together international experts from academia, industry, and government to present and discuss novel research in these areas. In celebration of this years conference anniversary the DIMVA program committee has prepared an excellent conference program! Besides, our Capture the Flag partner n.runs is organizing an accompanying program that is a Capture the Flag contest! For this reason the DIMVA2013 organizing committee is convinced that the conference is well suited for attendees who would like to claim Continuing Professional Education (CPE) points for an IT security professional certification program. Please note, different regulations apply for different certification programs and organizations. Check with your certification organization if an official DIMVA2013 attendance certificate is sufficient to earn CPE points for your certification program. DIMVA is organized by the special interest group Security – Intrusion Detection and Response (SIDAR) of the German Informatics Society (GI) and technically co-sponsored by the IEEE Computer Society. The conference proceedings will appear in Springer's Lecture Notes in Computer Science (LNCS) series.