The Justice Department argues that due to the sophistication of cyber-criminals, an offending computer or computer cluster can sit in a district separate from the district where the hackers that infected the target computer anonymously are and separate from the investigators’ district.
“Criminals are using multiple computers in many districts simultaneously as part of complex criminal schemes, and effectively investigating and disrupting these schemes often requires remote access to Internet-connected computers in many different districts,” wrote then-acting Assistant Attorney General Mythili Raman in a September letter to the Advisory Committee on the Criminal Rules.
“Botnets are a significant threat to the public: they are used to conduct large-scale denial of service attacks, steal personal and financial data, and distribute malware designed to invade the privacy of users of the host computers,” Raman continued.
In the letter, Raman cited an investigation of a child porn site that uses The Onion Router Network, or Tor, to anonymize its traffic. The Justice Department argues that it knows the site’s hosting server location, but without a warrant local to the server, the department is prevented from retrieving the server’s user records — including IP and MAC addresses. In most cases, however, law enforcement do not know the physical location of the site’s server, making it impossible to request a specific warrant.