So many security specialists warned against IM(Instant Messenger) security before. This is one of the proof of concept code against sensitive IM security, named project "MSN666" as you see, the name 'msn666' tells It's about Microsoft MSN Messenger. yah, it was the interesting stuff of our project as a common IM. msn666 is the simple sniffer for intercepting MSN MESSEGES on your network. In fact, msn666 analyzes msn message protocol for every packets and prints msn message sessions to your monitor, it's due to Microsoft MSN Messenger uses plain text to communicate with. therfore as a result, you could know "who is on the net", "who talks to whom" and "what they say" you could get msn666 from http://underground.or.kr/project/msn666/msn666-1.0.0.tar.gz ++ Seunghyun Seo, Inha university Group of Research for Unix Security [e-mail] seo@igrus.inha.ac.kr , frog@hackerslab.com