A numeric name looks like a boring system temp file that a casual user might ignore.
Many malicious RARs are password-protected (often the password is "1234" or "password"). This is a tactic used to prevent antivirus software from "seeing" what's inside the archive. 4. Technical Breakdown of This Naming Pattern 55623.rar
Go to VirusTotal.com and upload the file. It will scan the archive against 70+ different antivirus engines. If more than 2 or 3 flag it, delete it immediately. A numeric name looks like a boring system
If you still have the file, do double-click it. RAR files are archives; they aren't dangerous until you extract and run the files inside, but it's best not to poke the bear. Follow these steps: 55623.rar