Sucuri SiteCheck – Web Malware Distribution – March 2012

Apologies for not posting stats for February. We were making some internal changes which delayed the process and skewed the data. Regardless, here are the latest stats for March.

Note: This information is based on infections found using our FREE scanner, SiteCheck. It does not include infections found via our internal monitoring service.

This illustration shows the top 26 infections identified via our signatures:

The top three infections for the month came from the following signatures:

Malware Entry: MW:ANOMALY:SP8

Description: A suspicious block of javascript or iframe code was identified. It loads  (possibly malicious) code from external web sites. It was was detected by our anomaly behaviour engine. These types of code are often used to distribute malware from external web sites while not being visible to the user.

Malware Entry: MW:HTA:7

Description: This attack uses the .htaccess file to redirect users to a site serving malware (or spam). In some cases, the index.php is also modified to do the redirection as well.

Malware Entry: MW:JS:160

Description: This malware infects a web site through a compromised desktop (with virus), where it steals any stored password from the FTP client and uses that to attack the site.

Note that every PHP, HTML and JS file can get compromised by this malware. On some variations of this attack, it is also compromised through vulnerable versions of Timthumb/WordPress.

Some anti virus programs will flag this type of malware (after infecting a computer) as Blackhole Exploit kit or similar names.

If you have questions, let us know in the comments below. Or feel free to send us an email –

About Tony Perez

Tony works at Sucuri. His passion lies in educating and bringing awareness about online threats to business owners. He spends his time giving presentations and writing content that everyday website owners can appreciate. His passions revolve around understanding the psychology of bad actors, the impacts and havoc hacks have on website owners, and thinking through the evolution of attacks. You can find his personal thoughts on security at Tony on Security and you can follow him on Twitter at @perezbox.


    Hi Tony, thanks! You guys offer and amazing product. Keep up the good work. Thanks for keeping us and our customers safe.

    Carel (Owner:

  • Bikram Kawan

    I have recovered one of my site from this tool. Thanks for great tool.

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