Despite the use of state of the art methods to protect against malicious programs, they continue to threaten and damage computer systems around the world. This paper presents MET, the Malicious Email Tracking system, designed to automatically report statistics on the flow behavior of malicious software delivered via email attachments both at a local and global level. MET can help reduce the spread of malicious software world-wide, especially self replicating virii, as well as provide further insight towards minimizing damage caused by malicious programs in the future. Small scale simulations are presented to demonstrate MET in operation and suggests how detection of new virus propagations via flow statistics can be automated.

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