In this paper, we analyze network security problem and detect the possibility of different viruses attacking time on ?Personal Area Network? using Markov Chain Model. As we know Personal area network is involved in personal data transmission which doesn?t have efficient defense system in their network hence Personal Area Network (PAN) is more vulnerable to malicious attack. So personal information as well as important data can get leaked or can be used for intriguing intent. As it is really exposed to breach we intent to work on this project to analyze network security problem and attack or defense behaviors. We used Markov?s chain model to obtain possible data and analytical information about movement of applicable threats in PAN by setting up a real time environment in Virtual Machine. Possible data?s will give a scheme of defense mechanism of attacker?s tactics and response of individual?s firewall as well as anti-threat option.