Feeds

Email worm joins Blaster attack on Windows

Shot by both sides

  • alert
  • submit to reddit

SANS - Survey on application security programs

A new variant of the Sobig worm is spreading rapidly across the Internet this afternoon.

Sobig-F, like its predecessors, can spread via either email or (less commonly) network shares.

Infectious emails come with a variety of subject lines (eg. 'Your details', 'Re: Approved', 'Re: Your application', 'Re: Wicked screensaver', 'Re: That movie', 'Thank you!', etc.) and an infectious .pif or .scr attachment. Launching the infected attachment infects a computer, natch

Sobig-F scans infected PCs for email addresses prior to blasting out copies of itself using its own SMTP client using spoofed email addresses filleted from the compromised PC.

Advisories by F-Secure and Sophos provide more information.

The worm is spreading rapidly. Managed services firm MessageLabs had blocked Sobig-F 36,227 times since spotting it yesterday.

We're getting sick of saying this, but Sobig-F is a Windows-only menace. Mac, Linux, OS/2 and Unix users are immune.

For Windows users it's the now familiar routine of updating viral software, blocking executables at the gateway and crossing their fingers that the current viral plague will subside.

A substantial number of firms are beginning to question whether this approach is appropriate given the current onslaught of malicious code.

Firms like MessageLabs and Avecho.com argue that the only sensible place to block malicious code is before it reaches users whilst a new generation of behaviour blocking firms are coming forward with technology to lock down Windows PCs. ®

Related Stories

Blaster worm spreading rapidly
Blaster rewrites Windows worm rules
Windows Update still standing despite Blaster
Blaster variant offers 'fix' for pox-ridden PCs
Post Blaster, MS floats default auto updates for Windows
Today's latest mass mailing worm (Sobig-A)
Why spammers lurve the 'Microsoft support' worm
VX writers release sequel to infamous Sobig worm

Combat fraud and increase customer satisfaction

More from The Register

next story
Parent gabfest Mumsnet hit by SSL bug: My heart bleeds, grins hacker
Natter-board tells middle-class Britain to purée its passwords
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
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
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
prev story

Whitepapers

Designing a defence for mobile apps
In this whitepaper learn the various considerations for defending mobile applications; from the mobile application architecture itself to the myriad testing technologies needed to properly assess mobile applications risk.
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.
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.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.