My forum has been hacked

[Charis]

Hi,

My forum (eMichanikos.gr (http://eMichanikos.gr)) has been hacked.
I cannot log into the adminCP or run tools.php.
https://vborg.vbsupport.ru/external/2015/05/1.jpg

I would appreciate any help.
Thanks in advance.

P.S.: I've already read THIS (http://www.vbulletin.com/forum/blogs/michael-miller/3934768-recovering-a-hacked-vbulletin-site) and THAT (http://www.vbulletin.com/forum/blogs/zachery/3993888-fixing-your-site-after-you-have-been-hacked).
I haven't restored my database yet, but I've restored the default vBulletin files (vB 4.2.2 PL4).
I also checked the config.php and disabled all plugins by adding define('DISABLE_HOOKS', true); into config.php.

[Zachery]

it actually looks like your datastore has gotten corrupted.

But, if you want a quick fix, restore the database. If you don't have a recent backup let this be a lesson to you to keep backups more often.

I'd reupload the 4.2.2 files and run the upgrade. Then upload tools.php to the AdminCP and use it to rebuilt the bitfields and other datastores.