I wanted to get on top of this but I am a little too late.
While the original Criminal Minds went through a subtle remix in its theme (which I did not like) and opening sequence (bring back A.J. Cook!), here we are today with the four-episode-old spin-off’s quite-cool theme song. YouTubers are fast and yes a bunch already uploaded the intro.
As expected, with such a young show, not much information is available for the theme song. However, IMDb lists Marc Fantini, Steffan Fantini and Scott Gordon as official composers. Let me go out on a limb here and say (for certain) that the Fantini guys composed this one as well.
More dirt on this theme song in the future.
See the official intro sequence of Criminal Minds: Suspect Behavior below.