Microsoft tool unable to detect new versions of Zeus

Powered by SC Magazine
 

"A good first step".

Though Microsoft has added new protection capabilities to its Malicious Software Removal Tool (MSRT) to help organisations fight Zeus, its tool is ineffective at detecting the newest version of the insidious data-stealing malware, according to researchers at security firm Trusteer.

Last month, coinciding with the release of its monthly bundle of security fixes, Microsoft added Zeus detection and removal capabilities to the freely distributed MSRT.

But after testing the tool against hundreds of Zeus files, Trusteer researchers determined that it is able to detect and remove an old version of Zeus 46 percent of the time but is unable to protect against the latest version, Mickey Boodaei, CEO of Trusteer, told SCMagazineUS.com.

“What Microsoft did is a good first step, but in terms of effectiveness and sustainability against Zeus, we think there is a lot more work to do,” Boodaei said.

The most recent version of Zeus contains sophisticated capabilities to evade detection, Boodaei said.

Each time the data-stealing trojan is installed on a machine, its footprint changes, meaning all the filenames and registry keys associated with the malware are unique, he said. Even older versions of the malware contain less sophisticated capabilities that allow it to evade anti-virus detection most of the time.

“The good news is that MSRT has and will be able to kill approximately half of the Zeus population,” Boodaei wrote in a blog post. “This detection rate is very respectable since most anti-virus solutions, if not all, have a much lower detection rate.”

One week after adding the protection capabilities, Microsoft said the tool cleaned Zeus, also known as Zbot, 281,491 times from 274,873 computers, making it the most prevalent family of malware removed from machines.

However, according to Trusteer, the tool is not able to prevent Zeus-related fraud in a majority of cases because it does not operate in real time.

Financial fraud typically occurs within hours or days after a computer is infected with Zeus because sensitive information is immediately transmitted to criminals, Boodaei said. Attackers have a “window of opportunity” between the time a computer is infected with Zeus and the next MSRT scan to steal money from a victim's bank account.

“The fraudsters are very quick to act,” Boodaei said. “You get infected, they analyse your computer, the next time you go onto your bank account the fraud occurs.”

The computer security industry as a whole is lagging behind the Zeus authors, he added.

“We need to find more ways of removing the dependency on signatures and the need to know what Zeus looks like and how it behaves in order to block it,” he said. “That's the only way of successfully fighting Zeus in this dynamic world the fraudsters have created.”

A Microsoft spokesperson did not immediately respond to a request for comment.

See original article on scmagazineus.com

Copyright © SC Magazine, US edition


 
 
 
Top Stories
Windows 10 lands in Australia
Campaign to get business to upgrade kicks off.
 
NSW to build its own myGov
Service NSW digital profiles available by September.
 
Android bug leaves a billion phones open to attack
Hackers only need phone number to target devices.
 
 
Sign up to receive iTnews email bulletins
   FOLLOW US...
Latest articles on BIT Latest Articles from BIT
The 5 Windows 10 privacy issues you should be aware of
Jul 31, 2015
There are a few unsettling details when it comes to Windows 10 privacy
Windows 10 is here! (For some)
Jul 29, 2015
Delivery of the free upgrade versions of Windows 10 began today - have you got yours yet?
Microsoft reveals Microsoft Send, a new enterprise chat app to rival Slack
Jul 27, 2015
Microsoft Send is MSN Messenger for grownups, and you could be using it at work very soon
Developers offered $500,000 grants to find HoloLens uses
Jul 8, 2015
Can augmented-reality end up in business?
Microsoft Tossup: The planning app for unorganised groups of friends
Jul 8, 2015
App allows friends to research venues, vote on plans and chat. And depending on how you run your ...
Latest Comments
Polls
Should law enforcement be able to buy and use exploits?



   |   View results
Yes
  14%
 
No
  51%
 
Only in special circumstances
  17%
 
Yes, but with more transparency
  18%
TOTAL VOTES: 775

Vote