Yahoo!-owned ad firm serves up trojans

Posted by   Virus Bulletin on   Sep 11, 2007

Infectious flash adverts displayed on major sites.

Advertising supplied by ad firm Right Media, a company bought out by web giant Yahoo! earlier this year after an initial investment in October 2006, has been serving up ads which use exploits to drop malware onto vulnerable systems.

The ads are thought to have appeared on a number of major sites, including those of MySpace, PhotoBucket, BeBo and UK newspaper The Sun, and may have been used on several million page impressions during August. The flash-based ads load an iframe which attempts a drive-by download, infecting unpatched systems via vulnerabilities.

According to Right Media, the trojan is capable of detecting requests from its 'Media Guard' content-checking system and thus hiding the malware during its security filtering process, allowing the malicious software through to end-users. Users are advised to ensure their systems are fully up to date with the latest patches from Microsoft and all other software providers, to minimise the exposure to vulnerabilities.

More detail on the incident is at Security Fix here. Details of the 'Media Guard' system are on the Right Media blog here and here.

Posted on 11 September 2007 by Virus Bulletin



Latest posts:

In memoriam: Prof. Ross Anderson

We were very sorry to learn of the passing of Professor Ross Anderson a few days ago.

In memoriam: Dr Alan Solomon

We were very sorry to learn of the passing of industry pioneer Dr Alan Solomon earlier this week.

New paper: Nexus Android banking botnet – compromising C&C panels and dissecting mobile AppInjects

In a new paper, researchers Aditya K Sood and Rohit Bansal provide details of a security vulnerability in the Nexus Android botnet C&C panel that was exploited in order to gather threat intelligence, and present a model of mobile AppInjects.

New paper: Collector-stealer: a Russian origin credential and information extractor

In a new paper, F5 researchers Aditya K Sood and Rohit Chaturvedi present a 360 analysis of Collector-stealer, a Russian-origin credential and information extractor.

VB2021 localhost videos available on YouTube

VB has made all VB2021 localhost presentations available on the VB YouTube channel, so you can now watch - and share - any part of the conference freely and without registration.

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.