Patch early, patch often, but don't blindly trust every 'patch'

Posted by   Martijn Grooten on   Apr 16, 2018

Patching is important, but not everything that presents itself as a security patch is safe to install.

Malwarebytes researcher Jérôme Segura has written a detailed analysis of the 'FakeUpdates' campaign, where thousands of websites with an out-of-date content management system have been compromised to spread malware. Rather than exploiting vulnerabilities in browsers or browser plug-ins, as is common in exploit kits, this campaign uses social engineering to trick a user into installing malware.

A visitor to such a site would be presented with a dialog urging them to update their browser or their Flash Player plug-in, but the update is, in fact, a script, hosted on Dropbox, that downloads the final payload. Jérôme mentions having seen both the Chthonic banking trojan and the NetSupport RAT being delivered; both have been used in exploit kits in the past.

fakeupdates.pngA compromised site running Joomla serving a Dropbox-hosted .js file masquerading as a Flash Player update. (Thanks to Adrian Luca for the screenshot.)


Though technically not very advanced, this threat might not be picked up by many automatic analysis systems since it requires user interaction. Moreover, to further frustrate researchers, the dialog is shown only once per IP address.

One of the leading researchers in web-based malware, Jérôme will speak at VB2018 on another recent trend in web-based malware: drive-by cryptocurrency miners. VB2018 takes place in Montreal, Canada 3-5 October this autumn. The programme was published last week; registration will open soon.

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

 

Latest posts:

VB2018 paper: Lazarus Group: a mahjong game played with different sets of tiles

The Lazarus Group, generally linked to the North Korean government, is one of the most notorious threat groups seen in recent years. At VB2018 ESET researchers Peter Kálnai and Michal Poslušný presented a paper looking at the group's various…

Book your VB2019 ticket now for a chance to win a ticket for BSides London

Virus Bulletin is proud to sponsor this year's BSides London conference, which will take place next week, and we have a number of tickets to give away.

First 11 partners of VB2019 announced

We are excited to announce the first 11 companies to partner with VB2019, whose support will help ensure a great event.

VB2018 paper: Fake News, Inc.

A former reporter by profession, Andrew Brandt's curiosity was piqued when he came across what appeared at first glance to be the website of a small-town newspaper based in Illinois, but under scrutiny, things didn’t add up. At VB2018 he presented a…

Paper: Alternative communication channel over NTP

In a new paper published today, independent researcher Nikolaos Tsapakis writes about the possibilities of malware using NTP as a covert communication channel and how to stop this.

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.