Feeds

The voodoo that Dumaru doesn’t do too well…

The worm turns

  • alert
  • submit to reddit

Build a business case: developing custom apps

This weekend saw another iteration of email worm Dumaru. Unlike other email worm variants, Dumaru.J spreads itself by way of a zip attachment (rather than the typical executable). Of course, should users open the zipped file, and click the file ‘myphoto.jpg.56 (spaces). exe’ Dumaru does its typically annoying thing.

Dumaru is sent as an attached zip in an email with the subject line of 'Important information for you. Read it immediately!'. I f Dumaru.J is executed, it attempts to create a copy of itself in the Windows System directory as both l32x.exe and vxd32v.exe. Dumaru then attempts to save the file rundllx.sys in the Windows directory. Dumaru.J also attempts to save a copy of itself in the Windows Startup directory as dllxw.exe. Dumaru.J creates the file zip.tmp in the Windows Temp directory as a copy of the worm it e-mails to target addresses. The Windows registry
is modified to run the Trojan upon Windows start up:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
load32=C:\WINDOWS SYSTEM DIRECTORY\l32x.exe

Dumaru.J may also attempt to create the following registry key:

HKLM\Software\SARS

Once installed on an infected machine, Dumaru scans the hard drive for email addresses to which it sends itself via its own SMTP engine on port 25.

Perhaps the most worrying feature of the worm though, is that it opens and listens on TCP port 10,000 for remote commands, allowing unfettered system access.

Although AV vendors rate Dumaru as a low to mid priority threat the fact that it is transmitted as a zip file which many corporates allow, and when installed the worm can be used for remote access are causes for conceqrn.

As always, the advice is to update AV signatures. The initial infecting account appears to be the charmingly-titled ‘FUCKENSUICIDE@HOTMAIL.COM’, so it’s probably worth blocking that too…®

See below, for a screenshot of the offending email:

Dumaru screen shot

The essential guide to IT transformation

More from The Register

next story
Rupert Murdoch says Google is worse than the NSA
Mr Burns vs. The Chocolate Factory, round three!
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
Germany 'accidentally' snooped on John Kerry and Hillary Clinton
Dragnet surveillance picks up EVERYTHING, USA, m'kay?
Snowden on NSA's MonsterMind TERROR: It may trigger cyberwar
Plus: Syria's internet going down? That was a US cock-up
Who needs hackers? 'Password1' opens a third of all biz doors
GPU-powered pen test yields more bad news about defences and passwords
Think crypto hides you from spooks on Facebook? THINK AGAIN
Traffic fingerprints reveal all, say boffins
Microsoft cries UNINSTALL in the wake of Blue Screens of Death™
Cache crash causes contained choloric calamity
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
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.