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=USUAN1100004

MacLeod's description:

Genre: Horror
Length: 1:26
Instruments: Piano, Synth

Simple piano line with dark atmospherics in the background. It says "Zombie", but it is useful for any number of creepy motifs. (This piece is related to Zombie Chase). 042
ISRC: US-UAN-11-00004 Unnerving, Eerie, Mystical, Mysterious, Suspenseful 2006