Skip navigation
Skip navigation
You are using an outdated browser. Please upgrade your browser.

Development comes as a new variant of the Downadup worm strikes

BitDefender has detected a new and more aggressive version of the Downadup virus which is spreading by using a Windows RPC Server Service vulnerability. Called Win32.Worm.Downadup.C. – this latest version is more resistant to disinfection. Once a system has been compromised, the worm disables Windows Update and blocks access to most anti-virus websites in order to disrupt attempts to disinfect the machine.

BitDefender is the first AV vendor to offer a free tool which disinfects all versions of Downadup and is available for all infected users at: It is claimed that this domain is the first to serve a removal tool without being blocked by the e-threat.

The worm itself is not new, it made its first appearance in late November 2008, when it was labeled Conficker or Kido. The worm is also known for exploiting the vulnerability described in the Microsoft security bulletin MS08-067. After successful exploitation it used to install rogue security software onto infected machines.

“BitDefender Labs has been seeing an increase in worms, like Downadup, that have a built-in mathematical algorithm, generating strings based on the current date,” said Vlad Valceanu, BitDefender’s senior malware analyst. “The worms then produce a fixed number of domain names on a daily basis and check them for updates. This makes it easy for malware writers and cybercriminals to upgrade a worm or give it a new payload, since they only have to register one of the domains and then upload the files."

To stay up-to-date on the latest e-threats, sign-up for BitDefender’s RSS feeds here.

About BitDefender®

BitDefender is the creator of one of the industry's fastest and most effective lines of internationally certified security software. Since its inception in 2001, BitDefender has continued to raise the bar and set new standards in proactive threat prevention. Every day, BitDefender protects tens of millions of home and corporate users across the globe — giving them the peace of mind of knowing that their digital experiences will be secure. BitDefender solutions are distributed by a global network of value-added distribution and reseller partners in more than 100 countries worldwide. For More information see here

# # #

Contact details:

Mike Ottewell
PR for BitDefender UK & Ireland
Tel: 01538 750 538

Nick Billington
BitDefender Country Manager (UK and Ireland)
Fax:- 0845 130 5069

This press release was distributed by ResponseSource Press Release Wire on behalf of MJO Associates in the following categories: Consumer Technology, Personal Finance, Business & Finance, Computing & Telecoms, for more information visit