My site was recently hacked, came back a few hours and was normal again? help?
 

So I was getting tons of emails from users on my forum that the site had been hacked, I go on to check it and what do I see? this, I took a screenshot of it earlier:

Attachment 46302

I have no idea what this hackers name is but looks Arabic to me, but at the top above the photo it said "" Where is your security" & also "Hacked by Reko"

if you type in "hacked by reko" in google, my site is the first thing that pops up, just click on CACHED to view how it was earlier, my site looks fine now....but something is fishy, I'm afraid he'll do it again or has left some kind of virus on the forum, according to my users, they were getting tons of spam emails from my site due to this hacker....

I don't know what to do guys...pretty new to this vbulletin stuff, any help would be appreciated.
Attached Images

• http://vb.ma7room.com/jpg.gif hacked.jpg‎ (54.2 KB)