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=USUAN1100667

MacLeod's description:

Genre: Soundtrack
Length: 2:48
Instruments: Synths, Percussion, Piano

2 of 8. Some dark and low rhythmic elements. Some bits of piano.
ISRC: US-UAN-11-00667
Eerie, Intense, Unnerving 2010