They were generally seen on the planetDathomir, near the village of Aurilia, though were reported to have been seen on other planets also. Though the Sith Shadows were known to have many species in their organization, a Wookiee was never known to have been seen. The Dark JediMellichae was known to have led the Shadows until imprisoned by the citizens of Aurillia.
It is possible that the Sith Shadows were engaged in regular thefts in the village of Aurilia because they were often found to be carrying valuable resources only used there. Those resources were often returned by spacers and used for much-needed repairs.
Sith Shadows appeared as a non-player characters in the video game Star Wars Galaxies, a massively multiplayer online-role playing game developed by Sony Online Entertainment and published by LucasArts, prior to its closure on December 15, 2011.