There is no "official" version of Hanoii.7z, which means its safety is entirely dependent on the source.
Based on available technical data and common security patterns, appears to be a compressed archive file (using the 7-Zip format) that is often associated with unofficial software distributions, game mods, or potentially unwanted scripts.
Because it is a generic filename rather than a mainstream commercial product, a "review" of its contents depends heavily on where you acquired it. Technical Overview
: Before opening, upload the file to VirusTotal to have it scanned by over 60 different antivirus engines. Community Perspective