Documents show that the FBI was able to plant the program on target machines by encouraging their subjects to click on a link that silently installed the software. The software is known as the computer and Internet Protocol address verifier and has the ability to sit silently on a PC and record a variety of activities. The FBI s use of the spyware surfaced in 2007 when the bureau used it to track e-mailed bomb threats against a Washington state high school to a 15-year-old student.
Source: https://threatpost.com/secret-documents-reveal-fbi-spyware-campaign-against-hackers-041709/72590/