On hoth there is a quest called Prisoner Extraction, on which you have to get into a group phase and kill some elites. As well as the elites, in the middle of the area there is a miniboss with around 120k hp which drops one moddable piece of gear and a couple of greens/blues. Unfortunately, I don't have any pics of loot nor i remember exactly what dropped >.>
Quest area with boss marked as red dot
Now the fun part is, you can get to (and kill) him without clearing any of the surrounding elite/strong mobs.
Up the marked stairs, he's right there
After he's dead, owner of the phase and the rest of the group gets out of the phase, and have someone else enter the phase 1st, making it his own phase and pretty much resetting the whole phase, thus making the boss killable once again. Quest is repeatable as well, so even if you finished that quest, you can do it over and over again. You will need a full group with a tank and a healer to kill him.