Malicious advertisements distributed by DoubleClick, Zedo networks

The advertisements redirect victims to the Nuclear exploit kit, which tries to install the Zemot malware

A diagram from Malwarebytes showing what happens when a user views a malicious advertisement, resulting in the installation of the Zemot malware.

A diagram from Malwarebytes showing what happens when a user views a malicious advertisement, resulting in the installation of the Zemot malware.

Two online advertising networks, Google's DoubleClick and Zedo, have been delivering malicious advertisements that could install malware on a person's computer, according to the security vendor Malwarebytes.

The Times of Israel, The Jerusalem Post and the Last.fm music services were among the websites serving the malicious advertisements, wrote Jerome Segura, a senior security researcher with Malwarebytes, in a blog post.

"We rarely see attacks on a large scale like this," he wrote.

Although ad networks try to filter out malicious ones, occasionally bad ones slip in, which on a high-traffic site means a large pool of potential victims. Websites that serve the ads are usually unaware of the problem.

"What is important to remember is that legitimate websites entangled in this malvertising chain are not infected," Segura wrote. "The problem comes from the ad network agency itself."

DoubleClick and Zedo officials couldn't immediately be reached for comment.

Segura wrote that the ads direct victims to sites hosting the "Nuclear" exploit kit, which attempts to see if a computer is running vulnerable versions of Adobe Systems' Flash program or Internet Explorer, among others.

A successful attack will install the "Zemot" malware, which can connect to a remote server and download other malicious applications.

Segura wrote that Malwarebytes is still investigating, but that the company had warned The Times of Israel.

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Tags securityMalwarebytesmalware

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Jeremy Kirk

IDG News Service
Show Comments

Essentials

Lexar® JumpDrive® S57 USB 3.0 flash drive

Learn more >

Microsoft L5V-00027 Sculpt Ergonomic Keyboard Desktop

Learn more >

Mobile

Lexar® JumpDrive® S45 USB 3.0 flash drive 

Learn more >

Exec

Lexar® JumpDrive® C20c USB Type-C flash drive 

Learn more >

Audio-Technica ATH-ANC70 Noise Cancelling Headphones

Learn more >

HD Pan/Tilt Wi-Fi Camera with Night Vision NC450

Learn more >

Lexar® Professional 1800x microSDHC™/microSDXC™ UHS-II cards 

Learn more >

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest News Articles

Resources

GGG Evaluation Team

Michael Hargreaves

Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell

LIFEBOOK UH574

The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi

STYLISTIC Q702

The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?