Name of a movie I saw?

I saw it on tv like a year ago but only the first 15 minutes, and
missed the title.

It is a humain extinsion type of movie

Movie begains with some nasa thing crashing and a couple bringing it
back to the village and opening it, and everybody in the village dies
except a few rare people and a guy who suicides with a chainsaw...
That is a much as I can remember

First person to give me the name of the movie above will get 5 points