Since H.G. Wells’ "The Flowering of the Strange Orchid" in 1894, there has been many writings and movies exploring the possibility of a space alien taking over a human body in order to live off the life energies of others.

Those space aliens are some kind of parasites that control our mind and draw our vital forces.

When they have exhausted the body, they look for a new host.  In another adjunct, vampires do not come from outter space but from another dimension.

More about alien creatures