Look for a README.txt or info.txt file within the archive to understand what it does before executing anything.
If you can share where you found this file or what game it is for, I can help you find a safer, legitimate alternative. BlitzV13.rar
Based on common file naming trends, here are the likely purposes for a "BlitzV13" file: Look for a README
Often, these files are trainers for games, aimed at giving users an advantage (e.g., speed hacks, aimbots). these files are trainers for games