This is a neutral level 1 critter native to the Zul'Drak region.
Killing one of these is required for [Pest Control].
You need to grab 5 of these to feed to a basilisk for the quest Gluttonous Lurkers. (see below).
As an Item
The Zul'Drak Rat also appears as an item when picked up in the course of the quest  Gluttonous Lurkers.