Heavy Large Credit Case

Heavy Large Credit Case is a prototype class 3 credit lockbox. Upon use, these boxes award credit 2140.

Source
Heavy Large Credit Cases can be obtained through the Crew Skill Slicing. They can be harvested from Biometric Footlockers on Alderaan, Balmorra (Republic), and Taris (Empire), which requires level 165 Slicing, or from level 25-32 Slicing missions.