Somebody commented in the post that the little devil logo is Beastie:

https://www.goto10retro.com/p/faster-atari-st-digital-magazi...

Interesting that it shows up on an Atari ST magazine. Maybe somebody there was a BSD fan in 1987?

Specifically, it's a rendition of the daemon from the cover of the 4.2BSD UNIX System Manager's Manual[1].

“Cover design by John Lassetter [sic], Lucasfilm, Ltd.”[2]

[1] https://archive.org/details/smm-4.2bsd/mode/1up

[2] https://archive.org/details/smm-4.2bsd/page/n1/mode/1up