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Cyren Security Blog

284,000 WordPress sites hacked? Probably not.

This Amazon order confirmation email is a fake.

Every link leads to malware. Every link (there are 8 in this example – similar to this attack) leads to a different compromised WordPress site. And they all seem to be using one of the most common WordPress theme directory – check out the links:

  • etc.

Notice a trend? – The evil redirect html file (—e.html) is located in the “twentyten” theme directory of all of these sites – and all of the sites we checked in every other version of the phony Amazon order. A Google search tells us that there are 284,000 sites with a similar structure.

Of course this does not indicate an issue with the theme itself. Chances are that the exploit that has allowed hackers to take over these sites is in a plugin or maybe (less likely) the CMS itself. Using the “twentyten” directory is a safe bet for a hacking script since almost every WordPress installation will have it.

The malware targets known Adobe Reader and Acrobat exploits.

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