Sophos

W32/Cuebot-K

Aliases
  • Backdoor.Win32.IRCBot.st
  • Win32/IRCBot.OO
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Chat programs
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from August 2006 (4.08)
Protection available since 30 June 2006 20:55:29 (GMT)
Detected by All Sophos products

Action

More Information

W32/Cuebot-K is a instant messaging worm and backdoor for the Windows platform.

W32/Cuebot-K spreads via AOL Instant Messenger. W32/Cuebot-K is a instant messaging worm and backdoor for the Windows platform.

W32/Cuebot-K spreads via AOL Instant Messenger.

When first run W32/Cuebot-K copies itself to <Windows system folder>\wgavn.exe and creates the file <Windows folder>\Debug\dcpromo.log.

The file wgavn.exe is registered as a new system driver service named "wgavn", with a display name of "Windows Genuine Advantage Validation Notification" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\wgavn\

W32/Cuebot-K sets the following registry entries, disabling the automatic startup of other software:

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
4

Registry entries are set as follows:

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
n

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

Registry entries are created under:

HKLM\SOFTWARE\Microsoft\security center\
HKLM\SOFTWARE\Policies\Microsoft\windowsfirewall\domainprofile\
HKLM\SOFTWARE\Policies\Microsoft\windowsfirewall\standardprofile\

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