The label cited "unauthorised reproduction and distribution of copyrighted sound recordings owned or exclusively distributed by Sony Music".
The 38-year-old, better known to his mother as Kim Schmitz, made a fortune reputed to exceed £100m with his hugely popular Megaupload file storage site, which US prosecutors allege was involved in the distribution of copyright-protected films, music and other material.
In the long run, unfettered distribution of copyrighted materials hurts everyone.
The suit says that Scour, based in Los Angeles, aids in the illegal distribution of copyrighted material on the Internet.
The question of online distribution of copyrighted works has been underscored recently in the debate over Napster, which allows computer users to exchange music over the Internet.
The film and television industry, well aware of how the Internet has undermined the record labels' control over the distribution of copyrighted music, is on the case.
Section III Plaintiffs claim Napster users are engaged in the wholesale reproduction and distribution of copyrighted works, all constituting direct infringement.
That is not to say that the companies have not been harmed by free copying and distribution of copyrighted material online.
"The ease of distribution of copyrighted content has helped create a generation of people who believe that all content should be free," she wrote.
She was sued not for downloading but for unauthorized distribution of copyrighted material; that is, she opened a folder of songs on her computer for Internet sharing, and a recording-industry spy computer found it.
