When I was in college, one of my business instructors told us students that one of the biggest hurdles to making money in business was procrastination.
The fix malware problem Codex has an outline of what permissions are acceptable. Directory and file permissions can be changed via an FTP client or within the page from your hosting company.
Everything you've worked for will go with this, should the server of your site return. You'll make no sales, get no visitors or signups to your site, and in short, you are out try this of business until you have the site.
Keep control of your assets - Nothing is worse than getting your livelihood in the hands of someone else. Why take chances with something as important as your website?
You can create a firewall that blocks hackers. The firewall prevents the hacker. You must have updated version of Apache. Upgrade your PHP. It is essential that your system is always full of upgrades.
Change your password, often, or at least admin username and your WordPress password and collect and utilize other WordPress safety Homepage tips to keep hackers out!