Sophos

W32/Cuebot-L

Aliases
  • Backdoor.Win32.IRCBot.st
  • WORM_IRCBOT.JL
  • CME-482
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
  • Chat programs
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from October 2006 (4.10)
Protection available since 13 August 2006 12:41:25 (GMT)
Detected by All Sophos products

Action

More Information

W32/Cuebot-L is a worm and backdoor Trojan for the Windows platform.

W32/Cuebot-L can spread to computers vulnerable to the Server Service exploit.

The following patch for the operating system vulnerability exploited by W32/Cuebot-L can be obtained from the Microsoft website:

MS06-040

W32/Cuebot-L spreads via AOL Instant Messenger. W32/Cuebot-L is a worm and backdoor Trojan for the Windows platform.

W32/Cuebot-L can spread to computers vulnerable to the Server Service exploit.

The following patch for the operating system vulnerability exploited by W32/Cuebot-L can be obtained from the Microsoft website:

MS06-040

W32/Cuebot-L spreads via AOL Instant Messenger.

When first run W32/Cuebot-L copies itself to <System>\wgareg.exe.

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

HKLM\SYSTEM\CurrentControlSet\Services\wgareg\

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

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
4

Note: disabling autostart for the SharedAccess service deactivates the Microsoft Internet Connection Firewall (ICF).

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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