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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Bobax.AO

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Bobax.AO
Technical name:W32/Bobax.AO.worm
Threat level:Low
Alias:Net-Worm.Win32.Bobic.d
Type:Worm
Effects:  

It connects to web servers in order to receive remote control commands, such as send spam, download a file, etc. It prevents users from accessing several websites. It spreads via email and across the Internet by exploiting the LSASS vulnerability, and is also downloaded to the computer by the Trojan Downloader.CZR.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:June 3, 2005
Detection updated on:June 6, 2005
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Bobax.AO is a worm that allows to be remotely administrated, by making queries to web servers. The worm can receive and carry out the following commands:

  • Update itself.
  • Download a file and run it.
  • Check the Internet connection speed.
  • Send spam to a list of email addresses.
  • Send a copy of itself via email.
  • Attempt to affect remote computers by exploiting the LSASS vulnerability. This vulnerability is critical for Windows XP/2000 operating systems that have not been patched.

Bobax.AO prevents users from accessing certain web pages, mostly belonging to antivirus companies.

Although this worm can be instructed to spread via email or across the Internet, it is also downloaded to computers affected by the Trojan detected as Downloader.CZR.

 

If you have a Windows XP/2000 computer, it is highly recommendable to download the security patch for the LSASS vulnerability from the Microsoft website.

Visible Symptoms 

    

Bobax.AO is difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.