So you’ve been hacked. Now what?

Extensive guide on how to fix your hacked WordPress installation from jtpratt.com (2011):

http://www.jtpratt.com/how-to-fix-a-hacked-wordpress-blog/

FAQ from WordPress.org:

http://codex.wordpress.org/FAQ_My_site_was_hacked

Find help by searching WordPress Answers:

http://wordpress.stackexchange.com/search?q=hacked

20 ways to find the problem (2010):

http://freshworkshops.com/2010/12/20-ways-to-find-your-wordpress-hacking-problem/

Finding backdoors in hacked WordPress sites (from 2009):

http://ottopress.com/2009/hacked-wordpress-backdoors/

From 2008 but contains helpful tips and hints:

http://smackdown.blogsblogsblogs.com/2008/06/24/how-to-completely-clean-your-hacked-wordpress-installation/

 

Prevention & Security

Security in WordPress from WordPress.org – Hardening WordPress:

http://codex.wordpress.org/Hardening_WordPress

Find security plugins on WordPress.org:

http://wordpress.org/extend/plugins/search.php?q=security&sort=

Securing your WordPress website from Smashing Magazine:

http://wp.smashingmagazine.com/2011/11/10/securing-your-wordpress-website/

7 ways people could hack your WordPress site:

http://markmaunder.com/2011/12/08/wordpress-security-ways-hack-wordpress-site/

Posts tagged “security” from Perishable Press:

http://perishablepress.com/press/tag/security/

WP Force regularly posts current WordPress security threats:

http://wpforce.com/wordpress-news/

 

For your computer

Excellent and free (for home use) anti-virus and malware software for your Windows PC:

http://www.avira.com/en/avira-free-antivirus

Free anti-virus and malware software for OSX:

http://www.clamxav.com/download.php