: If the origin is unknown and the filename is gibberish, the safest course of action is to delete the archive immediately.
: RAR files can contain "Zip Bombs" (files that expand to massive sizes to crash your system) or executable scripts that run as soon as they are unpacked. Dutfg8hzöiäoioz8tiutgi rar
: Use a reputable scanner or upload the file to VirusTotal to check it against dozens of different antivirus engines simultaneously. : If the origin is unknown and the