My Joomla/virtuemart online store, based on a yootheme template has caught a virus. It seems it loads an iframe on index files and mainframes and deletes the last part of code on the PHP file. It's not only the shop, it virtually attacked all my joomla sites on the server and they all seem to suffer from the same problem...even though all sites are different and not one has an consistent component...I tried to reload old backups which will give me access for about 5 minutes and then the problem is back, plus the back up is infected as well.
I would really appreciate if this could get cleaned asap, as the shop is out of business at present. Thank you in advance