Many different network and host-based security solutions have been developed in the past to counter the threat of autonomously spreading malware. Among the most common detection techniques for such attacks are network traffic analysis and the so-called honeypots. In this thesis, we introduce two new malware detection sensors that make use of the above mentioned techniques. The first sensor called Rishi, passively monitors network traffic to automatically detect bot infected machines. The second sensor called Amun follows the concept of honeypots and detects malware through the emulation of...