Gumblar compromise growth continues

Posted by   Virus Bulletin on   May 20, 2009

Dominant web threat infecting still more vulnerable sites.

A major web compromise, estimated by some to represent over 40% of infected web pages last week, has continued growing in size and prevalence at an alarming rate.

The threat, commonly dubbed 'Gumblar' after a domain used by early versions, but also known as 'JS/Redir', is thought to inject itself into websites using stolen ftp credentials to hosting servers, and uses the infected pages to serve malware which may seek out further ftp login data. It may also doctor Google search results to redirect more victims to compromised hosts, which attempt to infect via PDF and Flash exploits.

The threat's sharp growth in size was highlighted last week by researchers at Sophos and at ScanSafe, and the spurt seems to have continued with ever higher figures reported by a variety of sources. Mary Landesman at ScanSafe has kept up a running commentary on the spread of the threat on the STAT blog here, with more details on the threat itself at Unmask Parasites here and reports from US-Cert here and SANS here.

Posted on 20 May 2009 by Virus Bulletin

twitter.png
fb.png
linkedin.png
hackernews.png
reddit.png

 

Latest posts:

New paper: Behind the scenes of GandCrab's operation

The GandCrab ransomware regularly updated itself to newer versions to stay ahead of decryptors released by security researchers, and regularly included taunts, jokes and references to security organizations in its code. In a new paper, the AhnLab…

VB2019 paper: King of the hill: nation-state counterintelligence for victim deconfliction

At VB2019 Juan Andres Guerrero-Saade looked at nation-state actors using threat intelligence for victim deconfliction. Today we publish both his paper and the recording of his presentation.

The VB2020 call for papers - how it works

With the VB2020 Call for Papers now open, we explain how the selection procedure works, which may help you during your abstract submission.

VB2019 presentation: Targeted attacks through ISPs

In 2019 we saw a rise in the number of targeted malware infections spread via ISPs and service providers. In a last-minute paper presented at VB2019 in London, Kaspersky researcher Denis Legezo discussed the details of a number of such cases. Today…

VB2019 presentation: A deep dive into iPhone exploit chains

In a last-minute presentation at VB2019 in London, John Bambenek of the University of Illinois at Urbana-Champaign discussed details of campaigns that used advanced iOS and Android exploit chains against China’s Uighur minority. Today we release the…

We have placed cookies on your device in order to improve the functionality of this site, as outlined in our cookies policy. However, you may delete and block all cookies from this site and your use of the site will be unaffected. By continuing to browse this site, you are agreeing to Virus Bulletin's use of data as outlined in our privacy policy.