Sophos

W32/Sdbot-COT

Aliases
  • Backdoor.Win32.SdBot.avb
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 13 September 2006 05:52:16 (GMT)
Last updated 4 January 2007 10:02:38 (GMT)
Detected by All Sophos products
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Action

More Information

W32/Sdbot-COT is a worm and IRC backdoor Trojan for the Windows platform.

W32/Sdbot-COT runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

When first run W32/Sdbot-COT copies itself to <System>\lviss.exe.

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

HKLM\SYSTEM\CurrentControlSet\Services\Windows PE Debugger\

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

HKLM\SYSTEM\CurrentControlSet\Services\Messenger
Start
4

HKLM\SYSTEM\CurrentControlSet\Services\RemoteRegistry
Start
4

HKLM\SYSTEM\CurrentControlSet\Services\TlntSvr
Start
4

Registry entries are set as follows:

HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
DoNotAllowXPSP2
1

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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