JoomION scans Joomla files for malware and tampering

Joomla core handles security updates, access control, user permissions, multifactor authentication and the task scheduler, but it does not provide a general malware scanner or compare every file with an official release. A template override is not relevant here: overrides change rendered output, not the files and accounts that may have been compromised. Site owners usually add a security extension, use a host-level scanner, or inspect files manually after an incident. According to the listing, this extension goes beyond core by checking file integrity against Joomla core files, looking for suspicious patterns and disguised files, consulting Joomla VEL and NVD vulnerability data, auditing users, and quarantining flagged files.

It is aimed at administrators of public-facing Joomla sites, especially sites with many extensions, several backend users, or a need for scheduled checks and email alerts. Teams dealing with an existing compromise may also consider it as one part of an investigation. A small, well-maintained site with dependable hosting security, few users and no need for file or vulnerability audits has little reason to install it.

• The listing marks it as a free GPLv2-or-later download for Joomla 5 and 6, with updates through Joomla’s native updater.
• JoomION has eight other extensions listed, while this entry has no reviews; that is a limited directory track record, not evidence of quality.
• Before installing, check how it handles false positives, large scans, quarantine recovery, database checks and support. The listing does not explain those details, nor the depth of its vulnerability data or hardening changes.

Listed on the Joomla Extensions Directory.