Trackbacks on my 404 errors log

I’m getting a similar issue on a bunch of old images that are really gone but I have a feeling it has something to do with the recent attacks. I had over 7500 404s from 102 IP addresses just today. My entire site usually only gets 1500-2000 hits a month.

Any ideas about this, every day wp security shows:
/trackback

and the same Ip
I don′t have a trackback folder

Hello Guys,Watch Out! it seems its a vulnerability of xmlrpc
if you have wp 3.5 maybe this is the cause, if somebody has another solution, please tell me, Thanks
the solution here: (read carefully)

https://perishablepress.com/wordpress-xmlrpc-pingback-vulnerability/

# protect xmlrpc
<Files xmlrpc.php>
Order Deny,Allow
Deny from all
</Files>

To the best of my knowledge there is no such issue in WordPress 3.5.1 If you have concrete, empirical, evidence to the contrary, please see the Security_FAQ.

Thanks moderator to clarify this, I will erase the comment if its an error.

Hello, I’m back to report some new info.

I’ve just installed Bad Behavior plugin, and after it I never received such trackback spam. So I think:

Better WP Security + Bad Behavior = awesome

Great!