These archives are frequently shared on technical forums like Excel Web TR to help users fix issues where macros aren't running correctly on different computers.
If you must open it, ensure you have an active antivirus and consider opening it in a or Protected View without enabling macros unless you trust the author. MAKRO.rar
It typically contains Excel files (often with .xlsm or .xls extensions) that include Macros (automated scripts written in VBA). These archives are frequently shared on technical forums