A free, open-source alternative that supports RAR files, available at 7-zip.org .
If you are 100% certain the file is legitimate, you will need a RAR extractor to see its contents: sisbigbro (8).rar
Upload the file to VirusTotal to check it against dozens of different antivirus engines simultaneously. A free, open-source alternative that supports RAR files,
If this file was downloaded from an unofficial website, a social media link, or an email attachment, it is highly likely to be malicious. open-source alternative that supports RAR files
The original tool for this format, available at the official WinRAR site .