Social Marketing plugin hacked?

As soon as you download Social Marketing Version 1.2.1 | By Incsub it ask you to visit plugin site where there is a new version of Social Marketing available. Version ~ but when you download this version you find its Author is " ( )" and when you install it, it then wants to register all your site's membership email addresses with There is no mention of this in your installation instructions. What's on earth is going on here?