The Evolution of Malicious Agents. This paper examines the evolution of malicious agents by analyzing features and limitations of popular viruses, worms, and trojans, detailing the possibility of a new breed of malicious agents currently being developed on the Internet.
You can download it from the following link: https://packetstormsecurity.com/files/download/17771/agents.txt
Source: https://packetstormsecurity.com/files/17771/agents.txt.html