Tall and imposing, Malorum wore a dark maroon robe similar to that worn by Emperor Palpatine. Malorum was slightly Force-sensitive, though he was never recruited by the Jedi.

Malorum initially worked as an Imperial Intelligence operative, and along with Director Armand Isard, visited the Jedi Temple in the aftermath of Order 66. There, he saw a hologram of Emperor Palpatine addressing Anakin Skywalker as Lord Vader. Thus, Malorum was one of a few in the Empire—along with Prince Xizor, two decades later—who knew Vader's true identity, although Vader and Palpatine were unaware of this fact.