Feeds

Dasher update pierces Windows flaw

Keylogger variant works second time

Choosing a cloud hosting partner with confidence

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. ®

Beginner's guide to SSL certificates

More from The Register

next story
FYI: OS X Yosemite's Spotlight tells Apple EVERYTHING you're looking for
It's on by default – didn't you read the small print?
Russian hackers exploit 'Sandworm' bug 'to spy on NATO, EU PCs'
Fix imminent from Microsoft for Vista, Server 2008, other stuff
Microsoft pulls another dodgy patch
Redmond makes a hash of hashing add-on
'LulzSec leader Aush0k' found to be naughty boy not worthy of jail
15 months home detention leaves egg on feds' faces as they grab for more power
Kill off SSL 3.0 NOW: HTTPS savaged by vicious POODLE
Pull it out ASAP, it is SWISS CHEESE
Facebook slurps 'paste sites' for STOLEN passwords, sprinkles on hash and salt
Zuck's ad empire DOESN'T see details in plain text. Phew!
China is ALREADY spying on Apple iCloud users, watchdog claims
Attack harvests users' info at iPhone 6 launch
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
Three 1TB solid state scorchers up for grabs
Big SSDs can be expensive but think big and think free because you could be the lucky winner of one of three 1TB Samsung SSD 840 EVO drives that we’re giving away worth over £300 apiece.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.