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

Learn more >

Audio-Technica ATH-ANC70 Noise Cancelling Headphones

Learn more >

Lexar® JumpDrive® C20c USB Type-C flash drive 

Learn more >

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

Learn more >

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest News Articles

Resources

PCW Evaluation Team

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / 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.

Aysha Strobbe

Windows 10 / HP Spectre x360

Ultimately, I think the Windows 10 environment is excellent for me as it caters for so many different uses. The inclusion of the Xbox app is also great for when you need some downtime too!

Mark Escubio

Windows 10 / Lenovo Yoga 910

For me, the Xbox Play Anywhere is a great new feature as it allows you to play your current Xbox games with higher resolutions and better graphics without forking out extra cash for another copy. Although available titles are still scarce, but I’m sure it will grow in time.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?