55623.rar Now

If you found it in a folder like AppData\Local\Temp , it was likely downloaded by another program (a "dropper") already on your computer.

Unless you specifically generated this file yourself or it’s part of a very specific, known technical documentation package you were expecting, treat "55623.rar" as a high-security risk. 55623.rar

Where exactly did you , and did your antivirus give you any specific alerts when you found it? If you found it in a folder like

A numeric name looks like a boring system temp file that a casual user might ignore. 55623.rar