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FinFireWire allows the 'agent' to covertly unlock a password-protected computer. From here, the previously mentioned FinSpy can be installed on the target computer, giving headquarters full access to the infected machine.
FinFly USB allows broad snooping on a range of machines. The 'agent' can visit multiple Internet café's, and insert a USB drive on all machines.
If the 'target' uses one of the infected machines, all of their activity will be recorded, including Skype conversations. This is functionality that even the U.S. National Security Agency has reportedly had difficult with; intercepting the peer-to-peer infrastructure that Microsoft recently acquired.