[2][3][4] In addition Europol released a statement that said the operation was composed of a series of separate but complementary actions in Australia, Bulgaria, France, Germany, Italy, the Netherlands, Switzerland, the United Kingdom and the United States, with coordination efforts led by Europol and Eurojust; which greatly expands on the initial number of countries that the US press releases indicated.
[5] The name of the operation is a portmanteau of "hunt" or "hunter" and Tor, an open-source anonymity network that is often used to access the dark web.
One such method used was "controlled buys" of drugs from the dark market sites and then working to trace the sale back to the source mail box.
The methods remain of extreme interest to the civil rights and cyber community as to the methodology that used by the various agencies to identify the location of the server or the users.
Additionally, law enforcement agencies generally require an agreement in the form of a Mutual legal assistance treaty (MLAT) or Memorandum of Understanding (MOU) to operate in any specific country other than their own granting special permissions.