The lawsuit represents an innovative form of offensive warfare against the movie industry, which like the Recording Industry Association of America has turned to litigation to try and stem the wave of illegal file-sharing of copyright materials.

FORBES: Class Action Turns Tables On Copyright Lawyers

Participants also discussed new-wave techniques to stop new malware from taking root, including studying patterns of user and file activity to find suspicious behavior and broader use of encryption.

WSJ: Tech Companies Struggle to Keep Hackers at Bay

"Whenever file-sharing services go down, scammers and opportunists work quickly to ride on the wave of publicity generated by the targeted site's demise, " said Andy Maxwell, co-editor of Torrentfreak.com.

BBC: Hackers retaliate over Megaupload website shutdown