Feeds

Dasher update pierces Windows flaw

Keylogger variant works second time

High performance access to file storage

After an earlier unsuccessful attempt, Virus writers have created the first worm that successfully targets a critical Windows vulnerability (MS05-051) patched by Microsoft in October.

The Dasher-B worm exploits a vulnerability in Microsoft Windows Distributed Transaction Coordinator (MSDTC) to spread across vulnerable systems. Unpatched Windows 2000 computers are particularly at risk. If successful, the worm establishes a backdoor on vulnerable computers and opens up a link to a remote server for further instructions. The server instructs infected machines to download a copy of the worm itself and a keylogger, which hides itself on infected systems by using a rootkit driver. Windows users are strongly urged to apply the latest Microsoft security fixes to guard against attack.

The MS05-051 patch was the subject of early glitches, even after warnings that it was ripe for malware exploitation. "The worry is that the problems with the patch may have prevented it from being successfully rolled out onto some vulnerable computers," said Graham Cluley, senior technology consultant at anti-virus firm Sophos.

Success in spreading (albeit modestly) distinguishes Dasher-B from Dasher-A, samples of which were sent to anti-virus firms earlier this week. Coding mistakes in Dasher-A rendered it inert. ®

High performance access to file storage

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Web data BLEEDOUT: Users to feel the pain as Heartbleed bug revealed
Vendors and ISPs have work to do updating firmware - if it's possible to fix this
OpenSSL Heartbleed: Bloody nose for open-source bleeding hearts
Bloke behind the cockup says not enough people are helping crucial crypto project
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
Heartbleed exploit, inoculation, both released
File under 'this is going to hurt you more than it hurts me'
Bad PUPPY: Undead Windows XP deposits fresh scamware on lawn
Installing random interwebs shiz will bork your zombie box
Experian subsidiary faces MEGA-PROBE for 'selling consumer data to fraudster'
US attorneys general roll up sleeves, snap on gloves
prev story

Whitepapers

Mainstay ROI - Does application security pay?
In this whitepaper learn how you and your enterprise might benefit from better software security.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.