Did SONY mastermind this who computer hacking job as a way to get publicity for their movie?

The math doesn't add-up, several unreleased movies more maybe important than the interview were copied to piracy sites, they are being sued by various people who's personal information was leaked. They had already spend $40 Million in paid advertising, it's not like the needed to use gorilla marketing tactics.

No, too much personal information and e-mails were leaked, but they did use it to blatantly promote a stupid movie.

Of course not. The movie did not need publicity.