Evilution (2008)

movie plot:.....A microscopic alien life form has been discovered with the ability to possess the living and resurrect the dead. The United States Army has tried to communicate with it but failed. Instead, the military has tried to create a genetically altered version of the alien in order to resurrect dead soldiers on the battlefield. The alien fights back, turning soldier against soldier. Young scientist Darren Hall kidnaps the last pure specimen of the alien, determined to the reverse the damage inflicted and learn the secrets of life. Hiding in a mysterious building named The Necropolitan, he continues his experiments. On one fateful night, the alien is set loose on the unsuspecting tenants resulting in a new evolution of apocalyptic horror as infected tenants attack the unsuspecting, turning them into a cannibal horde. Darren and a small group of survivors must now find a way to destroy the alien possessed before they can escape into the city and bring forth the end of the human race......