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=USUAN1100101

MacLeod's description:

Genre: Soundtrack
Length: 0:38

Quiet tremolo strings that build slightly to an anti-climax. 038
ISRC: US-UAN-11-00101
Suspenseful, Mysterious 2006