I back up my blogs frequently using a free plugin WP DB Backup. If anything happens I can restore my website. I use WP Security Scan free plugin to scan my blog and asks that are suspicious-looking to be blocked by WordPress Firewall to fix wordpress malware virus.
You can search for software that will backup your database and files. If your website is hacked by hackers, you dig this can restore your website by means of your my link backup files and change everything that has to be changed.
This is very useful plugin, protecting you against brute-force attacks that are password-crack. It keeps track of the IP address of every login attempt. You can configure the plugin to disable login attempts for a selection of IP addresses when a certain number of failed attempts is reached.
You can extend the plugin features with premium plugins such as: Amazon S3 plugin, Members only plugin, DropShop etc.. I think this plugin is a fantastic choice and you can use it for free.
Always bear in mind the safety of your blogs depend on how you handle them. Be certain that you follow these basic tips to prevent hacks and exploits on your own blogs and sites.