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=USUAN1100260

MacLeod's description:

Genre: Horror
Length: 4:27
Instruments: Synth

Background horror music. Electronic. Kind of tech-horror sounding... Highly unnerving. 037
ISRC: US-UAN-11-00260
Dark, Unnerving, Mysterious, Eerie 2005