Re: 'security test' a site ?
Is your server fully patched up and are you using the latest version of Joomla
Re: 'security test' a site ?
joomla has been updated yes, not sure about the server. its externally hosted by a reputable comp so i presume any server updates are good.
Re: 'security test' a site ?
unfortunately there could be a million different ways into the site. Once you renamed your index.php did you check all the other files and also their security.
Has anything else been changed, are the chmod permissions all correct. I would also change all of your site passwords. Yeah I know the password file is MD5 encrypted but that’s not 100%, check the logs as well so you can see what else has gone on.
Do you have a backup of the site. A copy that definitely hasn't been messed with. If so it might be a good idea to up that one instead.
//Bod