[TheLastSuperman]

Originally Posted by loua_oz

.htaccess
file missing and that does not come with fresh install.

It does however its located in the do_not_upload folder, despite the folders name you do actually upload one of the .htaccess files in said sub-folders depending on your setup. So yes upon initial installation its not there, now lets say someone wanted to use Mod Rewrite Friendly URL's instead of the basic ones, they would have upon installation uploaded the .htaccess file required to make mod rewrite friendly URL's work in vBulletin.

So this may or may not simply be a case of a missing .htaccess file, also yes removal of or changes to an .htaccess file can make the site display wonky as if the formatting is off. Also bear in mind that over the course of a ten year span with being hacked upwards of four times... the settings and such despite it being vanilla in regards to modifications could still have template edits or other changes made internally that do not show nor are reflected in the actual files. So a call to a site or a file inserted into a template could be your backdoor here as well, I'd go through the database and use the queries in our blog posts to see if anything comes up.

Edit: Here are two links, backup your database if not already before doing anything;
http://www.vbulletin.com/forum/blogs...ve-been-hacked
http://www.vbulletin.com/forum/artic...vbulletin-site

Edit yet again! Per your second screenshot, looks as if you had the CMS setup in the root folder, and all the forum files uploaded to /forums/ so make sure you do the same setup again if that was the case. If a pertinent file is missing such as index.php (and nothing else such as an index.html file exist) then it has no way to render a missing file and will therefor list the contents of the directory. Basically to sum it up, servers are typically setup to look in a certain order for important files or well I should phrase it "looks for commonly known files such as index.php and index.html index.aspx or similar as they render content to browsers", usually it looks for index.php first then looks for index.html which by the way can be changed i.e. the order but in your case seems as if some files were not uploaded properly after restoring.
*****Just make sure you grasp that, you had setup the CMS in the root and the forums into /forums/ then read the info on how to setup the CMS in root and forums in a folder and ensure its all done correct and you *should* be back to normal unless of course like I initially suspected and the hacker modified the actual database.