Feeds

Firms hit in Nimda mutant outbreak

Variations on a theme

  • alert
  • submit to reddit

Security for virtualized datacentres

Dozens of firms have been infected by the latest mutation of Nimda.

But the outbreak is much less serious than in September, when the contagious worm made its first outing on the Internet. Even so, anti-virus vendors advise users to beware attachments called: "SAMPLE.EXE" (instead of "README.EXE" which appeared in the original Nimda worm).

Jack Clark, product marketing manager for the McAfee division of Network Associates, said the latest modification to Nimda "was not spreading like variants in the past because people have largely put detection in place".

Antivirus experts have discovered five Nimda variants - full definitions can be seen here. This is unlikely to be the final word from virus writers on the subject.

Nimda spreads through several means, ranging from simply viewing an infected web page using a browser with the security features switched off, to opening a malicious email attachment. It can also spread through network shares.

As well as penetrating workstations, Nimda attacks Web servers running under Microsoft Internet Information Server (IIS), using the Web Server Folder Traversal vulnerability. If Nimda gets onto your network, it creates bandwidth-wasting activity, by scanning the network like mad.

AV vendors are updating signature definition files to pick up the latest Nimda variant ®

Related Stories

'Nimda fix' Trojan disguised as security bulletin
Nimda worm runs riot on IT sites
Nimda worm tails off
Teenage Mutant Nimda email rides the Code Red worm
Virus writers are industrial terrorists - MS
MS issues bum security patch, contradicts self
MS says stop discussing hack exploits
Can IIS flourish post-Gartner?
Microsoft (finally) tries to make IIS secure

Secure remote control for conventional and virtual desktops

More from The Register

next story
NASTY SSL 3.0 vuln to be revealed soon – sources (Update: It's POODLE)
So nasty no one's even whispering until patch is out
Russian hackers exploit 'Sandworm' bug 'to spy on NATO, EU PCs'
Fix imminent from Microsoft for Vista, Server 2008, other stuff
Forget passwords, let's use SELFIES, says Obama's cyber tsar
Michael Daniel wants to kill passwords dead
FBI boss: We don't want a backdoor, we want the front door to phones
Claims it's what the Founding Fathers would have wanted – catching killers and pedos
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!
Admins! Never mind POODLE, there're NEW OpenSSL bugs to splat
Four new patches for open-source crypto libraries
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.
Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Win a year’s supply of chocolate
There is no techie angle to this competition so we're not going to pretend there is, but everyone loves chocolate so who cares.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.