MSB - Oracle Binary Message File is a file extension that is used by Oracle. If you are not using Oracle, then you will not be able to download this extension. It operates as a very good database management software program. This extension allows you to save application messages quickly, and much more. It also acts as a readable log file for different program alerts. You can use all of these things to your advantage. Everything is also saved in binary formats, so you will be able to easily find them. MSB files are common and generated for specific Oracle applications.