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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Gaobot.DQ

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Gaobot.DQ
Technical name:W32/Gaobot.DQ.worm
Threat level:Medium
Alias:Backdoor.Agobot.3.bv, W32/Gaobot.worm.gen.d
Type:Worm
Effects:  

It uses the RPC Locator, RPC DCOM and WebDAV vulnerabilities in order to spread to as many computers as possible. It connects to an IRC server and waits for control commands. It allows to obtain information on the affected computer, run files, etc.

Affected platforms:

Windows XP/2000/NT

Detection updated on:Feb. 2, 2004
StatisticsNo

Brief Description 

    

Gaobot.DQ is a worm with backdoor characteristics that affects Windows 2003/XP/2000/NT computers only. Gaobot.DQ exploits the RPC Locator, RPC DCOM and WebDAV vulnerabilities to spread to as many computers as possible.

Gaobot.DQ also spreads by attempting to copy itself to network shared resources.

Once it is run, Gaobot.DQ connects to a specified IRC server and waits for control commands. As a backdoor, it allows to obtain information on the affected computer, run files, launch distributed denial of service (DDoS) attacks, upload files by FTP, etc.

Gaobot.DQ ends processes belonging to antivirus programs, firewalls and system monitoring tools. This leaves the affected computer vulnerable to the attack of other viruses or worms. It also ends the processes of Nachi.A, Autorooter.A, Sobig.F and several variants of Blaster.

If you have a Windows 2003/XP/2000/NT computer, it is highly recommendable to download the security patches for the RPC Locator, RPC DCOM and WebDAV vulnerabilities from the Microsoft website.

Visible Symptoms 

    

A clear indication that Gaobot.DQ has reached the computer is that the network traffic increases on the ports 135 and 445, as the worm attempts to exploit the RPC DCOM vulnerability.