Sophos

W32/Sdbot-BSL

Aliases
  • W32/Sdbot.worm.gen.bp
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from July 2006 (4.07)
Protection available since 27 May 2006 04:32:47 (GMT)
Detected by All Sophos products

Action

More Information

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

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

W32/Sdbot-BSL 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-BSL copies itself to <Windows>\Msmgs.exe.

The file Msmgs.exe is registered as a new system driver service named "Windows
web messenger", with a display name of "Windows web messenger" 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 web messenger\

W32/Sdbot-BSL 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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