Your link to LeetHost is offline... ironic? lol
I'm going through the same issue right now - one of my vbulletin sites was defaced - as far as I can tell they only changed the index.php and forum.php files in the forum directory, but it appears they also deleted the adminlog. I found a backdoor/shell PHP file, a mysql backup so they have a full backup of our forum's database, etc. I do not see new users in the administrator section so they didn't create themselves a user on the site. It was a 5 minute fix to get the forum working again but it's really troubling that they were able to add the shell file with such ease...
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