Music by Kevin MacLeod. Available under the Creative Commons Attribution 3.0 Unported license. Download link: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100847

MacLeod's description:

Genre: Soundtrack
Length: 3:37
Instruments: Marimba, Xylophone, Percussion, Basses
Tempo: 108

One file that contains the same piece in 2 tempos; slower and faster. The slower version gives a more tribal feel - the fast one destroys that, and lends a slight edge-of-the-seat feel.
ISRC: US-UAN-11-00847
Dark, Driving, Mysterious, Suspenseful 2011