—suggests you might be looking at a specific download package.
Instead of risking your project's reputation and security, consider these legitimate ways to enhance your Osclass site: osclass plugin nulled portable
A "Snapshot" feature that packages your entire Osclass configuration and specific plugins into a single zip file that can be extracted and run on any server without running the standard install script again. Why Avoid "Nulled" Plugins? —suggests you might be looking at a specific
Nulled WordPress Plugins & Themes: 6 Risks + Safe Alternatives - Jetpack osclass plugin nulled portable