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=USUAN1200062

MacLeod's description:

Genre: Horror
Length: 3:09
Instruments: Synths

Sharp subtle percussive clicks accompany with otherworldly drone. ISRC: US-UAN-12-00062 Dark, Eerie, Mysterious, Suspenseful, Unnerving 2012