Many "multihack" archives found on forums or file-sharing sites are actually trojans or info-stealers designed to compromise your accounts.
If you intend to use Osiris, it is safest to build it from the Official GitHub Repository using Visual Studio rather than downloading a pre-packaged .rar . OsirisMultihack.rar
If you are investigating this file, follow these safety protocols: Many "multihack" archives found on forums or file-sharing
Use trusted tools like 7-Zip or an updated version of WinRAR from its official site to prevent extraction-stage exploits. OsirisMultihack.rar
Before running anything, upload the file to VirusTotal to see reports from multiple antivirus engines.