They are Djinn.
There may be Angels, but for the most part it is a war between the Djinn.
There are Djinn that will be helping humans, and then there are the Djinn (the Shaitan, followers of Iblis) who want to exterminate all of mankind.
The Djinn have acquired the Djinn body, whereas before their bodies were very frail and almost nonexistent.
They are born of a "smokeless fire", that is to say their bodies consist of electrical energy which they can manifest as "plasma" or "orbs" or "plasmoids".
This is a war of the Djinn.
The Djinn that stand with Allah, and the Djinn that stand with Iblis.
The Angels are made of light, but the Djinn can produce light with plasma so that the Shaitan will fool many into believing they are Angels.