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=USUAN1100804

MacLeod's description:

Genre: Soundtrack
Length: 1:19
Instruments: Percussion, Synths, Misc
Tempo: 111

Crazy dark and intense, this piece has a ton of atmosphere, and subtle digital effects. See also: Steel and Seething
ISRC: US-UAN-11-00804
Dark, Intense, Suspenseful, Unnerving 2011