Title theme music

Does anybody know what the title theme used in the film is, or maybe just the composer? It can be heard in the film's trailer as well.

https://www.youtube.com/watch?v=NUKbhKV7Ia8

The track isn't among the ones listed at the end of the film, nor could I find it in any list online. My guess would have been Brian Eno, but I've gone through my catalog of Eno albums back and forth and couldn't find it or anything like it.