Year and a half taught us that WordPress security shouldn't be taken lightly by any means. Between 15% and 20% of the world's high traffic websites are powered by WordPress. The fact that it is an Open Source platform and everybody has access to its Source Code makes it a tempting prey for hackers.
Allow me to shoot a few scare tactics your way since scare tactics seem to be what drives some people to take fix wordpress malware a little more seriously, or at least start thinking about the issue.
I protect an access to important files on the blog's server by placing an index.html file in the particular directory, which hides the files from public view.
You also need to place the"Anyone Can Register" in Settings/General to away, and you ought to have some type of spam plugin. Akismet is the old standby, the one I use, but there are lots of them nowadays.
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The plugin should be updated play nice with your other plugins, to stay current with the latest WordPress release and have WordPress cloning and restore capabilities. The ability to clone your site (in addition to regular copies ) can be helpful if you ever need to do an offline website redesign, among other things.