I vaguely recall the plot being a symbiotic alien transfers to humans from a black rock and controls them. One scene even showed them having the rock in a glass container with rubber gloves so they can handle it later on and as they put their hand close to it they could even see the alien reach out to the hand.
The alien looked like a liquid and shocked anyone when they touched it. Kind of like:
Have a feeling I saw it on the Sci Fi channel well before it was Syfy.