Standard Small Credit Box

Standard Small Credit Box is a standard class 2 lockbox. Upon use, these boxes award credit 234-419.

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