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This post will provide a very detailed and rather technical description of the latest massive WordPress hack. I find it interesting in many ways. Mainly because it’s so atypical.
If you don’t have time to read the whole article, you can head directly to the short description of the attack and then to the Summary section where I talk about what’s new, strange and uncommon in this attack. Or if you are a webmaster of a hacked blog, go to the “To Webmasters” section – it will help you resolve the problem.
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Right before this week-end I noticed an increased number of sites hosted on MediaTemple and RackSpace coming to Unmask Parasites with the same problem — their sites are blocked by Google and their diagnostic pages mention the following five domains: “myads .name“, “adsnet .biz“, “toolbarcom .org“, “mybar .us“, “freead .name“.
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I first noticed this hidden iframe from hxxp://networkads .net/ grep/ on April 7. It instantly drew my attention with these weird “iframe_style” scripts in Unmask Parasites reports (I even thought it was a bug in Unmask Parasites, but when I checked the infected site, I found those scripts there).
However it was a single incident and I didn’t see any obvious pattern back then. Two days later, when I noticed David’s (Sucuri Security) article about this very issue and the follow-up by Brian Krebs, I decided to take a closer look at it. What I found is quite interesting and raises a few serious questions about security of websites on shared servers.
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