The results were coordinated raids in April 2013 that swept up more than a dozen suspects.ĭeFoggi became part of that sting after becoming a registered member of PedoBook in March 2012 where he remained active until December that year when the FBI shuttered it. The malware that investigators installed remotely on the machines of visitors to PedoBook and McGrath's other sites was designed to identify the computer's IP address as well as its MAC address and other identifiers. Using the Tor browser, the traffic of users is encrypted and bounced through a network of computers hosted by volunteers around the world before it arrives at its destination, thus masking the IP address from which the visitor originates. Tor is free software that lets users surf the web anonymously. The FBI has been using malicious downloads in this way since 2002, but focused on targeting users of Tor-based sites only in the last two years. One of these techniques involved drive-by downloads that infected the computers of anyone who visited McGrath's web sites.
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