Yahoo!

Yahoo Malware Attack Affects Thousands Of Users

Thousands of Yahoo.com visitors were served with malicious software due to a security breach on the Yahoo ad network.

By Jamal Andress | January 5, 2014

Thousands of Yahoo.com visitors were served with malicious software due to a security breach on the Yahoo! ad network.

Security blog Fox-IT discovered the breach on Friday, writing: "Clients visiting yahoo.com received advertisements served by ads.yahoo.com. Some of the advertisements are malicious."

Fox-IT also estimates that about 9 percent of visitors to the malicious site through a Yahoo! ad were infected by the malware, which is about 27,000 infections per hour. The first sign of infection dates back to Dec. 30. 

Good news for U.S. residents, though: None of the attacks seem to have affected Yahoo! visitors in America. Fox-IT says users in Romania, Great Britain and France were most affected. 

Yahoo! responded to the security concerns in a statement, writing: "We recently identified an ad designed to spread malware to some of our users. We immediately removed it and will continue to monitor and block any ads being used for this activity."

Yahoo! is just the latest major company to suffer a severe security breach. 

In December last year, Target suffered the second largest heist of credit and debit card data in the country, affecting more than 40 million Target customers.

And Snapchat suffered a security breach where 4.6 million of its users had their usernames and phone numbers leaked online. 

As for Yahoo!'s breach, The Washington Post blames Java programming.

 

"The fact that the malware targeted flaws in the Java programming environment is an important reminder that the software has become a security menace."

According to Fox-IT, since Yahoo! discovered the problem on Friday the infections of malware to Yahoo! users have tapered off. 

  TRENDING IN Tech NEWS
A Tesla vehicle's interior is shown with the console's display activated.WATCHLIST
https://www.teslamotors.com/

Tech Today: Tesla Summon Mode, Super-Fast Internet, LG Quick Cover

U.S. Transportation Secretary Anthony Foxx and Google Chairman Eric Schmidt get out of a Google self-driving car at the Google headquartersWATCHLIST
Getty Images / Justin Sullivan

Feds Say They're Willing To Call Google's Autonomous Car A 'Driver'

FitbitWATCHLIST
Becky Stern / CC BY 2.0

Man On Reddit Uses Wife's Fitbit To Find Out She's Pregnant

Two customers check out a Tesla car in Miami.WATCHLIST
Getty Images / Joe Raedle

You Could Probably Afford Tesla's New Car If It Comes Out On Time

The VR headset is just one part of the expense equation.WATCHLIST
Oculus VR

You Can Buy A PC From Oculus For VR, Or You Could Just Build One

A photo of a downed airplane is shown in a tweet.WATCHLIST
Twitter

Tech Today: Twitter Timelines, Self-Driving Cars, Screen Protectors

Big data is playing an increasingly vital role in how candidates reach out to potential voters.WATCHLIST
 

How Candidates Get Data on Your Voting, Shopping and Facebook Habits

This is just another attempt by the tech company to help Twitter become a safer place for users, while making sure it's not trampling on freedom of expression.WATCHLIST
Getty Images / Bethany Clarke

Latest Twitter Tweak Creates Team To Cut Down On Online Abuse

The South Lawn of the White House is prepared for a barbeque hosted by U.S. President Barack Obama and first lady Michelle Obama on July 4, 2013, in Washington, DC.WATCHLIST
Getty Images / Ron Sachs

The White House Isn't Immune To The US' Internet Troubles

A shield is shown adorned with a padlock and green checkmark.WATCHLIST
Google

Google Will Give You Free Storage If You Check Your Online Security

India's new rules would make the Internet more closely resemble dumb pipes, without paid prioritization.WATCHLIST
Newsy / Evan Thomas

India Cracks Down Harder Than The FCC, Bans Special Data Pricing

Ford test drives an autonomous car in Michigan.WATCHLIST
Ford Motor Co.

Everything You Should Know About The Driverless Car You'll Own Someday

The CRAM (compressible robot with articulated mechanisms) from the PolyPEDAL Lab at UC Berkeley.WATCHLIST
University of California, Berkeley / PolyPEDAL Lab

Cockroach-Inspired Robot Can Squeeze Into Some Tight Spaces

A man using Google CardboardWATCHLIST
Getty Images / Justin Sullivan

Google Is Reportedly Making A New Smartphone-Powered VR Headset

You can do better than the usual list of common passwords.WATCHLIST
Newsy / Evan Thomas

How To Make Your Passwords Less Hackable

Twitter CEO Jack DorseyWATCHLIST
Getty Images / Bill Pugliano

RIP #RIPTwitter: Twitter CEO Says The Site's Feed Isn’t Changing

Twitter CEO Evan Williams is seen silhouetted against a screen as he shows off the newly revamped Twitter website on September 14, 2010 at Twitter headquarters in San Francisco, California.WATCHLIST
Getty Images / Justin Sullivan

Twitter Might Change Its Feed, And People Are Furious (Again)

Nintendo game character Mario stands next to the new gamer-themed car built by West Coast Customs on November 17, 2011 in Los Angeles, California.WATCHLIST
Getty Images / Kevork Djansezian

Nintendo Puts This Weird Sleep-Tracking Device On Hold

According to Cisco's projections, smartphones will be responsible for a majority of global network traffic by 2020.WATCHLIST
Newsy / Evan Thomas

When Smartphones Will Take Over The Planet

An illuminated sign is seen outside the University of Central Florida's Progress Energy welcome center.WATCHLIST
keone / CC BY SA 2.0

63K Social Security Numbers Stolen In University Hack In Florida

Apple CEO Tim Cook introduces the new iPhone 6s and 6s Plus during a Special Event at Bill Graham Civic Auditorium September 9, 2015 in San Francisco, California.WATCHLIST
Getty Images / Stephen Lam

Apple Just Lost A $626M Lawsuit To A 'Patent Troll'

Taylor Swift And Kim KardashianWATCHLIST
Getty Images / Mark Metcalfe / Kim Kardashian

T-Swift Takes A Note From Kim Kardashian; Mobile Game Is On The Way

Julian AssangeWATCHLIST
Getty Images

UN Expected To Vote In WikiLeaks' Julian Assange's Favor

2016 Scion FR-SWATCHLIST
Scion

Toyota Just Killed Off Its Scion Brand

Amazon's first and so far only physical bookstore.WATCHLIST
Getty Images / Stephen Brashear

Will Amazon 'Wal-Mart' The Bookstore Business?

Alphabet's various moonshots could pay off big — but it will be a while.WATCHLIST
Alphabet

Alphabet (Aka Google) Isn't Making Money On Moonshots Just Yet

A promotional poster for Instagram's film series, "Shield 5," is pictured.WATCHLIST
Instagram / 'Shield 5'

Instagram Wants You To Watch Its New Thriller — In 15-Second Spurts

Man wears a Fitbit Charge HRWATCHLIST
Fitbit

This University Now Requires New Students To Wear Fitbits

Eagle snatching drone out of the air.WATCHLIST
Politie

This Dutch Police Bird Can Take Drones Out Of The Sky

An employee at Google bikes past a sign.WATCHLIST
Getty Images / Justin Sullivan

Google's Alphabet Takes Down Apple To Be Named 'Most Valuable Company'