Apple Updates OS X Anti-Malware Definitions to Block 'Yontoo' Adware

Yesterday, word surfaced of new malware targeting major browsers on the Mac platform with adware capable of injecting advertising into users' browsing experiences. The malware, known as "Yontoo", masquerades as a video plug-in or download accelerator in order to trick users into installing the package.

yontoo_xprotect
As noted by security firm Intego, Apple has already updated its "Xprotect" anti-malware system to recognize Yontoo and warn users who attempt to install it on their machines.

Apple has decided the Yontoo Adware has fallen too far on the side of undesirable behavior, as they have released an update to the XProtect.plist definitions file to provide Mac OS X with basic detection for the Yontoo adware as OSX.AdPlugin.i. In testing, it appears this detection is very specific and potentially location-dependent. This extra specificity is likely there so as to catch only the surreptitious installations of this file.

Apple routinely uses its Xprotect anti-malware tools introduced in OS X Snow Leopard to provide rudimentary protection against threats, and has expanded its efforts in OS X Mountain Lion with the introduction of Gatekeeper to allow users to restrict app installation to software from identified developers registered with Apple, or even to only apps installed through the Mac App Store.

Apple has also been using Xprotect to enforce minimum version requirements for plug-ins such as Java and Flash Player, forcing users to upgrade from earlier versions known to have significant security issues.

Top Rated Comments

anzio Avatar
112 months ago
Great news. Though I've said it before, all software must pass through my built-in antivirus called "common sense." It's updated frequently.

So I'm not too worried.
Score: 18 Votes (Like | Disagree)
camnchar Avatar
112 months ago
But what about my freedom to install adware!
Score: 10 Votes (Like | Disagree)
madsci954 Avatar
112 months ago
But what about my freedom to install adware!

Said no one ever.
Score: 7 Votes (Like | Disagree)
tevion5 Avatar
112 months ago
But what about my freedom to install adware!

Such freedoms should come with free laxative overdoses.
Score: 6 Votes (Like | Disagree)
Mr Fusion Avatar
112 months ago
But what about my freedom to install adware!
You joke now...

... Just wait till OS XI debuts and you'll have to wait for the jailbreak to install third-party apps. ;)
Score: 5 Votes (Like | Disagree)
HenryDJP Avatar
112 months ago
This is a very good thing, not trying to be critical.

But isn't this a slippery slope towards 'microsoft security essentials'? For now xprotect surely uses less system resources, but I'd wager that eventually the day will come for antivirus/antimalware on osx.

Shouldn't matter much to you since you're running Windows 7...
Score: 4 Votes (Like | Disagree)

Related Stories

studio buds family

Beats Studio Buds Debuting Today With Active Noise Cancellation, Stemless Design, and More for $150

Monday June 14, 2021 8:00 am PDT by
We've seen a lot of teasers about the Beats Studio Buds over the past month since they first showed up in Apple's beta software updates, and today they're finally official. The Beats Studio Buds are available to order today in red, white, and black ahead of a June 24 ship date, and they're priced at $149.99. The Studio Buds are the first Beats-branded earbuds to truly compete with AirPods...
YouTube Picture in Picture Feature

YouTube Premium Subscribers Can Now Use iOS Picture-in-Picture: Here's How

Wednesday August 25, 2021 3:55 am PDT by
Google has rolled out picture-in-picture support as an "experimental" feature for YouTube premium subscribers, allowing them to watch video in a small window when the app is closed. If you're a premium YouTube subscriber looking to try out picture-in-picture, follow these steps: Launch a web browser and sign into your YouTube account at YouTube.com. Navigate to www.youtube.com/new. Scroll...
M1X MBP Feature

Leaker: Upcoming MacBook Pro to See Price Hike Over Current Model, Equal Performance Across 14 and 16-Inch Sizes

Tuesday August 24, 2021 5:28 am PDT by
The upcoming 14-inch MacBook Pro is set to be more expensive than the current 13-inch MacBook Pro and both the 14 and 16-inch models will offer the same performance, according to the leaker known as "Dylandkt." The leaker shared the information on Twitter, explaining that both of the upcoming MacBook Pro models, expected to come in 14 and 16-inch sizes, will feature the same performance due...
youtube apple tv

YouTube Discontinuing 3rd-Generation Apple TV App, AirPlay Still Available

Wednesday February 3, 2021 3:09 pm PST by
YouTube is planning to stop supporting its YouTube app on the third-generation Apple TV models, where YouTube has long been available as a channel option. A 9to5Mac reader received a message about the upcoming app discontinuation, which is set to take place in March.Starting early March, the YouTube app will no longer be available on Apple TV (3rd generation). You can still watch YouTube on...
ryanscoolios13thumbnail

Apple Releases iOS 13.1.3 With Bug Fixes for Phone, Mail, Health, and More

Tuesday October 15, 2019 10:09 am PDT by
Apple today released iOS 13.1.3 and iPadOS 13.1.3, minor updates to the iOS 13.1.2 software that was released two weeks ago. This is the fourth update to the iOS 13 operating system that came out in September. The iOS and iPadOS 13.1.3 updates are available on all eligible devices over-the-air in the Settings app. To access the updates, go to Settings > General > Software Update....
Top Stories 75 Thumbnail

Top Stories: Last-Minute iPhone 13 Rumors, Apple Announces App Store Changes, and More

Saturday September 4, 2021 6:00 am PDT by
The finish line is in sight! Apple's annual iPhone event is likely just a week or so away and all eyes will be on the company as it unveils the next version of its most popular product line. With any luck, we'll also see the next-generation Apple Watch and perhaps even some new AirPods. Other news this week saw Apple making some more changes to its App Store policies in response to a...
affinity designer contour tool

Serif Updates Affinity Photo, Designer, and Publisher With New Tools and Functions

Thursday February 4, 2021 1:58 am PST by
Serif today announced across-the-board updates for its popular suite of Affinity creative apps, including Affinity Photo, Affinity Designer, and the Apple award-winning Affinity Publisher for Mac, all of which were among the first professional creative suites to be optimized for Apple's new M1 chip. "After another year which saw record numbers of people switching to Affinity, it's exciting to...
iPhone 13 Dummy Thumbnail 2

Kuo: iPhone 13 to Feature LEO Satellite Communications to Make Calls and Texts Without Cellular Coverage

Sunday August 29, 2021 7:39 am PDT by
The iPhone 13 will feature low earth orbit (LEO) satellite communication connectivity to allow users to make calls and send messages in areas without 4G or 5G coverage, according to the reliable analyst Ming-Chi Kuo. In a note to investors, seen by MacRumors, Kuo explained that the iPhone 13 lineup will feature hardware that is able to connect to LEO satellites. If enabled with the relevant...
maxresdefault

Craig Federighi and Greg Joswiak Discuss iPadOS 15, macOS Monterey, Privacy, Shortcuts on Mac, and More

Saturday June 12, 2021 6:12 am PDT by
As is tradition, Apple executives Craig Federighi and Greg Joswiak joined Daring Fireball's John Gruber in an episode of The Talk Show to discuss several announcements that Apple made over this weeks WWDC, including iPadOS 15, macOS Monterey, and a large focus around privacy. Federighi kicks off the conversation discussing the common architecture, now thanks to Apple silicon, across all of...
iOS 14 on iPhone feature emergency

Apple Seeds Third Betas of iOS and iPadOS 14.6 to Developers [Update: Public Beta Available]

Monday May 10, 2021 10:13 am PDT by
Apple today seeded the third betas of new iOS and iPadOS 14.6 updates to developers for testing purposes, one week after seeding the second iOS and iPadOS 14.6 updates. iOS and iPadOS 14.6 can be downloaded through the Apple Developer Center or over the air after the proper profile has been installed on an iPhone or iPad. iOS and iPadOS 14.6 appear to be more minor changes focusing on...