Did you get the latest norton virus definitions update?
Did you even go to norton's website to read up on this virus?
Do you or someone you know use IRC (Internet Relay Chat) program?
-------------------------------------------------------------------
Careful, there are variants of this virus (Backdoor.Sdbot.B,
Backdoor.Sdbot.C, Backdoor.Sdbot.D, etc.)
Example of the differences in the virus strains:
The differences between Backdoor.Sdbot.E and Backdoor.Sdbot are:
The Backdoor.Sdbot.E variant uses the Svhosts.exe filename and it copies
itself as %System%\Svhosts.exe.
Adds the registry value:
Windows (host Not Remove) svhosts.exe
to these registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
NOTE: %System% is a variable. The Trojan locates the System folder and
copies itself to that location. By default, this is C:\Windows\System
(Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or
C:\Windows\System32 (Windows XP).
---------------------------------------------------------------------
Symantec Security Response encourages all users and administrators to adhere
to the following basic security "best practices":
Turn off and remove unneeded services. By default, many operating systems
install auxiliary services that are not critical, such as an FTP server,
telnet, and a Web server. These services are avenues of attack. If they are
removed, blended threats have less avenues of attack and you have fewer
services to maintain through patch updates.
If a blended threat exploits one or more network services, disable, or block
access to, those services until a patch is applied.
Always keep your patch levels up-to-date, especially on computers that host
public services and are accessible through the firewall, such as HTTP, FTP,
mail, and DNS services.
Enforce a password policy. Complex passwords make it difficult to crack
password files on compromised computers. This helps to prevent or limit
damage when a computer is compromised.
Configure your email server to block or remove email that contains file
attachments that are commonly used to spread viruses, such as .vbs, .bat,
..exe, .pif and .scr files.
Isolate infected computers quickly to prevent further compromising your
organization. Perform a forensic analysis and restore the computers using
trusted media.
Train employees not to open attachments unless they are expecting them.
Also, do not execute software that is downloaded from the Internet unless it
has been scanned for viruses. Simply visiting a compromised Web site can
cause infection if certain browser vulnerabilities are not patched.
REMOVAL INSTRUCTIONS:
The following instructions pertain to all current and recent Symantec
antivirus products, including the Symantec AntiVirus and Norton AntiVirus
product lines.
Disable System Restore (Windows Me/XP).
Update the virus definitions.
Do one of the following:
Windows 95/98/Me/2000/XP: Restart the computer in Safe mode.
Windows NT: End the Trojan process.
Run a full system scan and delete all the files detected as Backdoor.Sdbot.
Edit the changes that the Trojan made to the registry.
For details on each of these steps, read the following instructions.
1. Disabling System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you
temporarily turn off System Restore. Windows Me/XP uses this feature, which
is enabled by default, to restore the files on your computer in case they
become damaged. If a virus, worm, or Trojan infects a computer, System
Restore may back up the virus, worm, or Trojan on the computer.
Windows prevents outside programs, including antivirus programs, from
modifying System Restore. Therefore, antivirus programs or tools cannot
remove threats in the System Restore folder. As a result, System Restore has
the potential of restoring an infected file on your computer, even after you
have cleaned the infected files from all the other locations.
Also, a virus scan may detect a threat in the System Restore folder even
though you have removed the threat.
For instructions on how to turn off System Restore, read your Windows
documentation, or one of the following articles:
"How to disable or enable Windows Me System Restore"
"How to turn off or turn on Windows XP System Restore"
For additional information, and an alternative to disabling Windows Me
System Restore, see the Microsoft Knowledge Base article, "Antivirus Tools
Cannot Clean Infected Files in the _Restore Folder," Article ID: Q263455.
2. Updating the virus definitions
Symantec Security Response fully tests all the virus definitions for quality
assurance before they are posted to our servers. There are two ways to
obtain the most recent virus definitions:
Running LiveUpdate, which is the easiest way to obtain virus definitions:
These virus definitions are posted to the LiveUpdate servers once each week
(usually on Wednesdays), unless there is a major virus outbreak. To
determine whether definitions for this threat are available by LiveUpdate,
refer to the Virus Definitions (LiveUpdate).
Downloading the definitions using the Intelligent Updater: The Intelligent
Updater virus definitions are posted on U.S. business days (Monday through
Friday). You should download the definitions from the Symantec Security
Response Web site and manually install them. To determine whether
definitions for this threat are available by the Intelligent Updater, refer
to the Virus Definitions (Intelligent Updater).
The Intelligent Updater virus definitions are available: Read "How to update
virus definition files using the Intelligent Updater" for detailed
instructions.
3. Restarting the computer in Safe mode or ending the Trojan process
Windows 95/98/Me/2000/XP
Restart the computer in Safe mode. All the Windows 32-bit operating systems,
except for Windows NT, can be restarted in Safe mode. For instructions, read
the document, "How to start the computer in Safe Mode."
Windows NT/2000/XP
To end the Trojan process:
Press Ctrl+Alt+Delete once.
Click Task Manager.
Click the Processes tab.
Double-click the Image Name column header to alphabetically sort the
processes.
Scroll through the list and look for any of the filenames listed in step 1
of the "Technical Details" section. This filename can vary.
If you find the file, click it, and then click End Process.
Exit the Task Manager.
4. Scanning for and deleting the infected files
Start your Symantec antivirus program and make sure that it is configured to
scan all the files.
For Norton AntiVirus consumer products: Read the document, "How to configure
Norton AntiVirus to scan all files."
For Symantec AntiVirus Enterprise products: Read the document, "How to
verify that a Symantec Corporate antivirus product is set to scan all
files."
Run a full system scan.
If any files are detected as infected with Backdoor.Sdbot, click Delete.
5. Editing the registry
CAUTION: Symantec strongly recommends that you back up the registry before
making any changes to it. Incorrect changes to the registry can result in
permanent data loss or corrupted files. Modify the specified keys only. Read
the document, "How to make a backup of the Windows registry," for
instructions.
Click Start, and then click Run. (The Run dialog box appears.)
Type regedit, and then click OK. (The Registry Editor opens.)
Navigate to each of the following keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
RunServices
In the right pane, delete any of the following values that you find, or any
value that refers to the file that is detected as the Trojan:
"Configuration Manager"="Cnfgldr.exe"
"Configuration Manager"="Cnfgldr.exe"
"System Monitor"="Sysmon16.exe"
"MSSQL"="Mssql.exe"
"Configuration Loader" = "aim95.exe"
"Internet Config" = "svchosts.exe"
"System33" = "%System%\FB_PNU.EXE"
"Configuration Loader"="cmd32.exe"
"Windows Explorer"="Explorer.exe"
"Configuration Loader"="IEXPL0RE.EXE"
"Configuration Loader"="%System%\iexplore.exe"
"Sock32"="sock32.exe"
"Configuration Loader"="MSTasks.exe"
Exit the Registry Editor.
--
HTH
- Jeff
[WINNT 4 - SP 6, XP, IE 6, Office 2000]
