Just days after a massive hacking attack on employees at Sony’s Hollywood studio, distributor of the new James Franco comedy about a plot to assassinate North Korean leader Kim Jong Un, the actor wasted no time as host of “Saturday Night Live” and mined the situation for all it was worth. The cyber attack shut down most of the studio’s network for more than a week and hackers released sensitive data over the Internet, including employee salaries, Social Security numbers and high-quality digital versions of several unreleased films.