Sophos

W32/Sdbot-DKJ

Aliases
  • W32/Backdoor.BEXS
  • Backdoor.Win32.SdBot.bhk
  • IRC/SdBot trojan
  • W32/Sdbot.worm
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 2 April 2008 13:56:27 (GMT)
Detected by All Sophos products
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Action

More Information

W32/Sdbot-DKJ is a worm for the Windows platform.

W32/Sdbot-DKJ includes functionality to access the internet and communicate with a remote server via HTTP.

When first run W32/Sdbot-DKJ copies itself to:

<Windows>\cmd.exe
<Program Files>\KaZaA\My Shared Folder\pgoat10.exe

The file cmd.exe is registered as a new system driver service named "Windows task processor", with a display name of "Windows task processor" 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 task processor

The following registry entries are set, disabling system software:

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1

W32/Sdbot-DKJ 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\Microsoft\Windows NT\CurrentVersion\Winlogon
SFCScan
0

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
EnableFirewall
0

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile
EnableFirewall
0

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

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
SFCDisable
ffffff9d

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Shell
Explorer.exe %WINDIR%\cmd.exe

Registry entries are created under:

HKLM\SOFTWARE\Microsoft\Security Center
HKLM\SOFTWARE\Symantec\LiveUpdate Admin

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