Maxon maintains an archive of older versions for pipeline compatibility. Locate the ZBrush 2022 section.
If you cannot afford a full license, remember that Maxon offers a . During that trial, you have access to all legacy versions, including the 202208 build. There is no need to risk malware. zbrush 202208 link
Upload the file to VirusTotal (virustotal.com). If more than 2 engines flag it as malware, delete the file. Maxon maintains an archive of older versions for