To install ClamAV on your GoPanel server
$ /go/clamav

Update ClamAV virus definitions
$ freshclam

Enable ClamAV to start on boot
$ systemctl enable clamav-freshclam
$ systemctl start clamav-freshclam

Scan the entire /home directory and all its subdirectories
$ clamscan --infected --recursive /home

Removes infected files immediately (use with caution!).
$ clamscan --infected --remove --recursive /home
Backup important files before running with --remove.
Consider using --move=/path/to/quarantine instead of --remove to isolate infected files.

Scan and Virus Removal for a Single Domain "gopanel.org" in GoPanel
/go/clamav gopanel.org

Scan and Virus Removal for all Domains in GoPanel
/go/clamav all