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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Gaobot.GLV

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Gaobot.GLV
Technical name:W32/Gaobot.GLV.worm
Threat level:Medium
Type:Worm
Effects:  

It uses the LSASS, RPC DCOM, WINS, Workstation Service Buffer Overrun and Buffer Overrun in SQL Server 2000 Resolution Service vulnerabilities, among other means, in order to spread to as many computers as possible. It ends processes belonging to security tools and installs a TFTP server.

Affected platforms:

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

First detected on:May 17, 2005
Detection updated on:May 17, 2005
StatisticsNo

Brief Description 

    

Gaobot.GLV is a worm that ends processes belonging to several security tools, such as antivirus programs and firewalls, among others. This leaves the affected computer vulnerable to the attack of other malware.

Gaobot.GLV prevents users from accessing several web pages, mainly belonging to antivirus companies and computer security companies.

Additionally, this worm also installs its own TFTP (Trivial File Transfer Protocol) server on the affected computer.

Gaobot.GLV uses different means to spread:

  • It makes copies of itself in the shared network resources it accesses to.
  • It exploits the LSASS, RPC DCOM, WINS, Workstation Service Buffer Overrun and Buffer Overrun in SQL Server 2000 Resolution Service vulnerabilities to spread across the Internet.
  • It can access computers with the application SQL Server installed, and whose SA (System Administrator) account password is blank.

However, due to some programming errors, Gaobot.GLV does not function properly on some Windows versions, which limits its propagation capabilities.

 

It is highly recommendable to download the security patches for the LSASS, RPC DCOM, WINS, Workstation Service Buffer Overrun and Buffer Overrun in SQL Server 2000 Resolution Service vulnerabilities from the Microsoft website.

Visible Symptoms 

    

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