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=USUAN1100050

MacLeod's description:

Genre: Silent Film Score
Length: 0:45
Instruments: Piano

Short Theme in two tempos for your bad guy. 032
ISRC: US-UAN-11-00050
Dark, Mysterious, Humorous 2007