You cannot “crack” a WinRAR password easily. WinRAR uses AES-256 encryption for modern archives (RAR5 format). Cracking a strong 8-character password could take years with even the best GPU rig. Anyone promising instant cracking is lying.
While GameTrex claims their downloads are checked for viruses, it is a site for pirated content, which inherently carries risks. gametrex winrar password