Mass injection wave of WordPress sites - Rogue AV ...
5 Mar 2012 - "... Websense... has detected a new wave of mass-injections... The majority of targets are Web sites hosted by the WordPress content management system. At the time of writing, more than 200,000 Web pages have been compromised, amounting to close to 30,000 unique Web sites (hosts). The injection hijacks visitors to the compromised sites and redirects them to rogue AV sites that attempt to trick them into downloading and installing a Trojan onto their computer. The injected code is very short and is placed at the bottom of the page, just before </body> tag... After a three-level -redirection- chain, victims land on a fake AV site. In this example, the first chain is the ".rr.nu", and the landing site is the ".de.lv" top-level domain, but the landing site keeps changing. The rogue AV site appears to perform a scan on the computer and scares the user by displaying fake malware detections of various kinds of Trojans. The page looks like a Windows Explorer window with a "Windows Security Alert" dialogue box in it. The fake scanning process looks like a normal Windows application, however, it is only a pop-up window within the browser. The fake antivirus then prompts visitors to download and run their "antivirus tool" to remove the supposedly found Trojans. The executable is itself the Trojan... more than 85% of the compromised sites are in the United States, while visitors to these web sites are more geographically dispersed*... while the attack is specific to the US, everyone is at risk when visiting these compromised pages..."
13 Mar 2012 - "... We checked several aspects of each of these compromised websites and concluded that most of them are served by Apache webserver and PHP environment*...
... WordPress still serves the majority of the compromised websites; however, we did see a small amount of other CMS as well. We also noticed that an increasing number of Joomla sites** are also affected, with all other content managers making up a tinier slice...
... having the latest version of WordPress does not make you immune to this threat...
... some of the dominant attack vectors that websites using the latest WordPress version are likely to be exploited through:
• Weak passwords / stolen credentials
• Vulnerable third-party modules used in WordPress
• Security holes in the underlying server infrastructure, such as in the database server or the server side scripting engine (PHP in this case)..."