Isus.rar -

are you trying to do with it? (e.g., scan it for safety, extract its contents, know what it belongs to)?

To give you the exact "feature" or information you need, could you tell me: isus.rar

You will need archive software like WinRAR or 7-Zip to look at the contents of a .rar file. are you trying to do with it

Here is what I can tell you about managing a .rar file like "isus.rar": scan it for safety

"ISUS" sometimes refers to "InstallShield Update Service."