600,000 Macs Worldwide Reportedly Infected by Flashback Trojan

apple security iconArs Technica reports on a Tweet from Russian malware analyst Ivan Sorokin at Dr. Web claiming that the Flashback trojan has now infected over 600,000 Macs worldwide. That number reportedly includes 274 machines "from Cupertino", presumably meaning at Apple's headquarters.

According to Dr. Web, the 57 percent of the infected Macs are located in the US and 20 percent are in Canada. Like older versions of the malware, the latest Flashback variant searches an infected Mac for a number of antivirus applications before generating a list of botnet control servers and beginning the process of checking in with them.

The authors of the Flashback trojan have continued to tweak the software since it first surfaced last September, adjusting its tactics several times to include both social engineering tricks and exploits of vulnerabilities.

The most recently-seen version of Flashback surfaced earlier this week, exploiting a Java vulnerability that was unpatched on OS X. While Oracle had released an update closing the hole on Windows back in February, Apple had yet to issue a fix for Macs, as the company has historically maintained its own Java updates that are deployed some time after Oracle issues its own corresponding updates. But just a day after that report, Apple did update Java to address the vulnerability being exploited by Flashback.

Antivirus firm F-Secure has instructions on how users can determine whether their machines are infected by the Flashback trojan. The instructions do involve running commands in Terminal, and users should thus take care to follow the instructions exactly.

Top Rated Comments

chrisperro Avatar
157 months ago
clean here, update your system often and you should not run into this trojans...
The malware self-installs after you visit a compromised or malicious webpage. Obviously, it would be a good idea to update any Macs in your control.

For those who want to check if mac is infected (from F-Secure instructions):
Run the following command in terminal:

defaults read /Applications/Safari.app/Contents/Info LSEnvironment
defaults read ~/.MacOSX/environment DYLD_INSERT_LIBRARIES

If you get "The domain/default pair ... does not exist" for both - you are clean


from 9to5mac
Score: 42 Votes (Like | Disagree)
basesloaded190 Avatar
157 months ago
I'm usually against cruel and unusual punishment, but people who spend their life creating these Trojans and other things need to be punished appropriately.
Score: 32 Votes (Like | Disagree)
Starflyer Avatar
157 months ago
If I'm reading the information on the F-secure website correctly, the trojan wont install itself if it discovers that Microsoft Office or Skype is already installed?

Interesting.
I guess it feels that we are suffering enough already with these installed. Hmm, this must be a new, more compassionate trojan.
Score: 29 Votes (Like | Disagree)
ArcaneDevice Avatar
157 months ago
Here comes the debate between the definitions of "Malware" and "Virus"

Humans can't get malware.
Score: 21 Votes (Like | Disagree)
miles01110 Avatar
157 months ago
People click through certificate warnings all the time, mostly because they don't know or care what it means. I don't think the scenario is as far-fetched as you seem to think it is.

Before going into panic mode, try to analyse what you have here. End user has to manually accept a self sign certificate from "Apple" for a Java application. One has to be very dumb to do that.

You cannot protect ignorant people, even if you like.

Difference here is that you only get infected if you explicitly allow malware to run. In MS world you get infected without even knowing it.
Score: 15 Votes (Like | Disagree)
davidcmc Avatar
157 months ago
Here we go again....

At least it appears to be easier to remove than a Windows style malware infection...
The article has clearly stated that you need to use Terminal, which involves commands and some deep knowledge of what you're doing, for Flashback's removal.
In Windows, you just need to use Windows Malicious Software Removal Tool or a decent anti-virus, which involves 1 or 2 clicks.

Yea, it's gotta be very hard to click things. I mean, typing commands in Terminal must be simpler.

I know that MacRumors is an Apple oriented place, where Apple lovers come to discuss things about Apple's product. But, posts like the one I quoted make it look like a fanboy place, not an Apple technology discussion place.
Score: 14 Votes (Like | Disagree)

Popular Stories

Delta Feature

Delta Game Emulator Now Available From App Store on iPhone

Wednesday April 17, 2024 9:58 am PDT by
Game emulator apps have come and gone since Apple announced App Store support for them on April 5, but now popular game emulator Delta from developer Riley Testut is available for download. Testut is known as the developer behind GBA4iOS, an open-source emulator that was available for a brief time more than a decade ago. GBA4iOS led to Delta, an emulator that has been available outside of...
iOS NES Emulator Bimmy Feature

NES Emulator for iPhone and iPad Now Available on App Store [Removed]

Tuesday April 16, 2024 11:33 am PDT by
The first approved Nintendo Entertainment System (NES) emulator for the iPhone and iPad was made available on the App Store today following Apple's rule change. The emulator is called Bimmy, and it was developed by Tom Salvo. On the App Store, Bimmy is described as a tool for testing and playing public domain/"homebrew" games created for the NES, but the app allows you to load ROMs for any...
iPhone 15 Pro Action Button Translate

All iPhone 16 Models to Feature Action Button, But Usefulness Debated

Tuesday April 16, 2024 6:54 am PDT by
Last September, Apple's iPhone 15 Pro models debuted with a new customizable Action button, offering faster access to a handful of functions, as well as the ability to assign Shortcuts. Apple is poised to include the feature on all upcoming iPhone 16 models, so we asked iPhone 15 Pro users what their experience has been with the additional button so far. The Action button replaces the switch ...
maxresdefault

Hands-On With the New App Store Delta Game Emulator

Wednesday April 17, 2024 12:19 pm PDT by
A decade ago, developer Riley Testut released the GBA4iOS emulator for iOS, and since it was against the rules at the time, Apple put a stop to downloads. Emulators have been a violation of the App Store rules for years, but that changed on April 5 when Apple suddenly reversed course and said that it was allowing retro game emulators on the App Store. Subscribe to the MacRumors YouTube channel ...
iOS 18 Siri Integrated Feature

iOS 18 Will Add These New Features to Your iPhone

Friday April 12, 2024 11:11 am PDT by
iOS 18 is expected to be the "biggest" update in the iPhone's history. Below, we recap rumored features and changes for the iPhone. iOS 18 is rumored to include new generative AI features for Siri and many apps, and Apple plans to add RCS support to the Messages app for an improved texting experience between iPhones and Android devices. The update is also expected to introduce a more...