Simple Small Credit Box

Simple Small Credit Box is a standard class 2 lockbox. Upon use, these boxes award credit 167-284.

Source
Simple Small Credit Boxes can be obtained through the Crew Skill Slicing. They can be harvested from Coded Safe Boxes or Security Footlockers on Balmorra (Empire) and Taris (Republic), which requires level 55 or 90 Slicing, or from level 17-24 Slicing missions.