vampires

The Vampires are victims of a cognitohazard - a memetic virus designed during the Second Corporate War, probably by NAWSLER.

Because of a glitch in a code of reality, they became extremely powerful - nearly immortal, much faster, stronger and smarter than ordinary humans. Some reports say that they can even survive in the vacuum of space for short periods of time.

It seems that they can communicate telepathically with one another.

During the Corporate Wars (Second and Third - they started fighting each other during the latter) they operated the so-called Night Ships - highly advanced vessels, capable of rapid acceleration and decelaration that would kill human crew in moments. No Night Ship has survived to this day. 

The Virus had one additional side effect. Vampires are not self-aware anymore. Despite their intelligence, problem solving capabilities and cunning, they are nothing more than beasts.