[virusinfo] W32/Sdbot-WK
- From: "Mike" <mikebike@xxxxxxxxx>
- To: virusinfo@xxxxxxxxxxxxx
- Date: Mon, 28 Mar 2005 14:48:33 -0800
From; Sophos Alert System:
Name: W32/Sdbot-WK
Type: Win32 worm
Date: 28 March 2005
A virus identity (IDE) file which provides protection is
available now from the Sophos website, and will be incorporated
into the May 2005 (3.93) release of Sophos Anti-Virus.
Customers using EM Library, PureMessage or any of our Sophos
small business solutions will be automatically protected at
their next scheduled update.
At the time of writing, Sophos has received a small number of
reports of this worm from the wild.
Information about W32/Sdbot-WK can be found at:
http://www.sophos.com/virusinfo/analyses/w32sdbotwk.html
W32/Sdbot-WK is a network worm with backdoor functionality for the Windows
platform.
W32/Sdbot-WK is capable of spreading to computers on the local network
protected by weak passwords after receiving the appropriate backdoor command.
W32/Sdbot-WK will also attempt to spread by exploiting the following
vulnerabilities:
RPC DCOM (MS03-026, MS03-039, MS04-012)
LSASS (MS04-011)
WorKStation service (MS03-049)
Microsoft SQL Server 2000 (pre service pack 3) (CAN-2002-0649)
Microsoft SQL servers with weak passwords
When first run, W32/Sdbot-WK moves itself to the Windows system folder as
PC.EXE. In order to run automatically each time a user logs on, W32/Sdbot-WK
will set the following registry entries:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Service Drivers
PC.EXE
HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices
Service Drivers
PC.EXE
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Service Drivers
PC.EXE
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
Service Drivers
PC.EXE
W32/Sdbot-WK will attempt to stealth itself by dropping and running a file
named MSDIRECTX.SYS. This file runs as a service named "msdirectx" and is
detected as Troj/NtRootK-F.
W32/Sdbot-WK runs continuously in the background, providing backdoor access to
the infected computer over IRC channels.
W32/Sdbot-WK will modify the following registry entries in order to disable
DCOM and close restrictions on IPC$ shares:
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1
W32/Sdbot-WK will attempt to disable the Windows Internet Connection Firewall
and Automatic Updates by modifying the following registry entries:
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Start
HKLM\SYSTEM\CurrentControlSet\Services\wuauserv\Start
W32/Sdbot-WK can add and delete network shares and users on the infected
computer.
W32/Sdbot-WK may modify the HOSTS file found in the %SYSTEM%\driver\etc folder
in order to deny access to certain anti-virus websites. For example,
127.0.0.1 www.sophos.com
127.0.0.1 sophos.com
W32/Sdbot-WK will attempt to terminate a large number of security and
anti-virus related processes.
This IDE file also includes detection for:
Troj/Agent-CR
http://www.sophos.com/virusinfo/analyses/trojagentcr.html
Troj/Spybot-DM
http://www.sophos.com/virusinfo/analyses/trojspybotdm.html
Troj/Bdoor-FX
http://www.sophos.com/virusinfo/analyses/trojbdoorfx.html
Troj/Dluca-DN
http://www.sophos.com/virusinfo/analyses/trojdlucadn.html
Troj/Certif-D
http://www.sophos.com/virusinfo/analyses/trojcertifd.html
Troj/Dloader-KC
http://www.sophos.com/virusinfo/analyses/trojdloaderkc.html
Troj/Banker-MO
http://www.sophos.com/virusinfo/analyses/trojbankermo.html
Download the IDE file from:
http://www.sophos.com/downloads/ide/sdbot-wk.ide
Download all the IDE files available for the current version of
Sophos Anti-Virus in a single compressed file. The file is
available in two formats:
Zip file:
http://www.sophos.com/downloads/ide/ides.zip
Self-extracting file:
http://www.sophos.com/downloads/ide/ides.exe
Read about how to use IDE files at
http://www.sophos.com/downloads/ide/using.html
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