how to take measures against the site hacked?

[hizirforum]

Hello

A week before that my site was hacked twice.
How do I need to measure?I hope you can help me.

[Disasterpiece]

- search in database for users which have empty usernames or admin access
- uninstall all mods/plugins/themes
- backup your database
- reinstall your server completely (ask your host for assistance)
- install fresh vbulletin
- restore backup
- reinstall mods/styles
- find weak spot and take action so it won't happen again.

[y2ksw]

- use strong passwords, like: uxPK2v5bpz
- choose reliable administrators only, demote all the others to moderators
- consider blocking notoriously known hacker IP's by firewall
- install only plugins you fully trust, in all other cases ask an expert