BAT.Vandeed.Worm

When BAT.Vandeed.Worm is executed, it does the following:

1. Adds the value:

darn C:\DARN.BAT

to the registry key:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

so that the worm runs each time you start Windows.

2. Adds the values:

dir0 012345:C:\\ProgramFlies
dir99 012345:C:\Windows\Desktop
DisableSharing 0

to the registry key:

HKEY_CURRENT_USER\SOFTWARE\KAZAA\LocalContent

If the infected computer has KaZaA installed, this will give access to the C:\\ProgramFlies and C:\Windows\Desktop folders to other KaZaA users.

3. Creates the subfolder ProgramFlies in the folder from which the worm is executed.
4. Copies itself as C:\ProgramFlies\Darn.bat and C:\Windows\Desktop\GameWarez.bat.
5. Copies itself to all the drives that exist on the infected computer.
6. Pings mail.yahoo.com.

• 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.

These instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

1. Update the virus definitions.
2. Run a full system scan and delete all the files detected as BAT.Vandeed.Worm.
3. Delete the following values added to the registry keys:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

HKEY_CURRENT_USER\SOFTWARE\KAZAA\LocalContent

• Running LiveUpdate, which is the easiest way to obtain the 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), in the "Protection" section, at the top of this writeup.
• 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), in the "Protection" section, at the top of this writeup.
  
  The Intelligent Updater virus definitions are available here. For detailed instructions on how to download and install the Intelligent Updater virus definitions from the Symantec Security Response Web site, click here.

a. 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."
b. Run a full system scan.
c. If any files are detected as infected with BAT.Vandeed.Worm, click Delete.

a. Click Start, and then click Run. (The Run dialog box appears.)
b. Type regedit, and then click OK. (The Registry Editor opens.)
c. Navigate to the key:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

d. In the right pane, delete the value: darn.

e. Navigate to the key: HKEY_CURRENT_USER\SOFTWARE\KAZAA\LocalContent.

f. In the right pane, delete the values:
• dir0
• dir99
• DisableSharing
  
g. Exit the Registry Editor.

Write-up by: Robert X Wang