"According to CitizenLab's research and WikiLeaks cables, following should be the supported features":
Bypassing of 40 regularly tested Antivirus Systems
Covert Communication with Headquarters
Full Skype Monitoring (Calls, Chats, File Transfers, Video, Contact List)
Recording of common communication like Email, Chats and Voice-over-IP
Live Surveillance through Webcam and Microphone
Country Tracing of Target
Silent extracting of Files from Hard-Disk
Process-based Key-logger for faster analysis
Live Remote Forensics on Target System
Advanced Filters to record only important information
Supports most common Operating Systems (Windows, Mac OSX and Linux) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------ source: http://www.infosecisland.com/blogview/22202-FinFisher-The-Cyber-Espionage-Tool-Found-Everywhere.html
more here, including a mind-blowing account on how a special unicode character in the filename of the spyware installer along the awesome security of the windows shell is used to trick users into seeing "something.jpg.exe" as "something.exe.jpg" and double click on it...
https://citizenlab.org/2012/07/from-bahrain-with-love-finfishers-spy-kit-exposed/
FC -- During times of Universal Deceit, telling the truth becomes a revolutionary act Durante épocas de Engaño Universal, decir la verdad se convierte en un Acto Revolucionario - George Orwell