W32.Banwarum.G@mm

Printer Friendly Page

Discovered: July 06, 2006
Updated: February 13, 2007 12:57:22 PM
Type: Worm
Systems Affected: Windows



W32.Banwarum.G@mm is a worm that spreads through file-sharing networks such as KaZaa, Morpheus, eDonkey2000, LimeWire, and iMesh. It also downloads a .zip file from a predefined Web site and sends it as an email attachment to addresses that it gathers from the compromised computer.

Note: Detections prior to July 7th, 2006 may detect this threat as W32.Banwarum.G

Antivirus Protection Dates

  • Initial Rapid Release version July 06, 2006
  • Latest Rapid Release version August 05, 2008 revision 049
  • Initial Daily Certified version July 06, 2006
  • Latest Daily Certified version August 06, 2008 revision 003
  • Initial Weekly Certified release date July 12, 2006

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Kazumasa Itabashi

Discovered: July 06, 2006
Updated: February 13, 2007 12:57:22 PM
Type: Worm
Systems Affected: Windows


When W32.Banwarum.G@mm is executed, it performs the following actions:

  1. Creates the following mutex:

    TurkishCooL

  2. Creates the following file:

    %System%\[RANDOM].dll

    Note: %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

  3. Adds the value:

    "(Default)" = "{[RANDOM GUID]}"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad

    so that it runs every time Windows starts.

  4. Adds the value:

    "(Default)" = "%System%\[RANDOM].dll"

    to the registry subkey:

    HKEY_CLASS_ROOT\CLSID\{[RANDOM GUID]}\InProcSrver32

    so that it runs every time Windows starts.

  5. Adds the values:

    "HardNum" = "[RANDOM]"
    "LoadNum" = "[RANDOM]"

    to the registry subkey:

    HKEY_LOCAL_MACHINE_SOFTWARE\Microsoft\Internet Explorer\Main

    as infection markers.

  6. Sends information about the compromised computer to the following Web site:

    [http://]85.105.130.110/leema[REMOVED]

  7. Gathers email addresses from the Windows Address Book.

  8. Sends the email addresses to the following Web site:

    [http://]85.105.130.110/w.p[REMOVED]

  9. Downloads files from the following Web site:

    [http://]85.105.130.110/load[REMOVED]

  10. Uses Microsoft Outlook to send an email with a .zip file to the addresses that it finds.

    The email has the following characteristics:

    From: [BLANK]

    Subject:
    Antivirus project

    Message body:
    Hi! How are you? This is the best soft from Microsoft Windows Planforms.
    I've like it very much...

    Attachment:
    util_v2_5.zip

  11. Searches the following registry entries for folders to copy itself to:

    HKEY_CURRENT_USER\Software\KaZaa\LocalContent\"Dir0" = "012345:[FOLDER 1]"
    HKEY_LOCAL_MACHINE\Software\Morpheus\"Install_Dir" = "[FOLDER 2]"
    HKEY_LOCAL_MACHINE\Software\iMesh\Client\"DownloadsLocation" = "[FOLDER 3]"

  12. Attempts to copy itself to the following folders:

    [FOLDER 1]
    [FOLDER 2]\My Shared Folder
    C:\Program Files\eDonkey2000\incoming
    C:\Program Files\LimeWire\Shared
    [FOLDER 3]

    as the following file names:

    Zoo Tycoon.exe
    ZoneAlarm.exe
    Zone Alarm Security Suite 5.5.062 Crack.exe
    XP Slipstreamer v1.0 Crack.exe
    XBOX X-Fer Ripper and Transfer.exe
    WinZip.exe
    WinZip v9.0 Registration.exe
    Winzip Keygen.exe
    WinZip All Versions keygen.exe
    WinZip 9.x Crack.exe
    WinRAR.exe
    WinRAR All KeyGen.exe
    WinRAR 3.x Crack.exe
    Windows XP SP2 KeyGen.exe
    Windows XP Professional crack.exe
    Windows XP Pro 64-bit Crack.exe
    Windows XP home edition Activation.exe
    Windows XP Activation Crack.exe
    Windows Server 2003 SP1 Build 1039-2l Crack.exe
    windows server 2003 crack.exe
    Sygate Personal Firewall PRO v5.5 Build 2577 Crack.exe
    Strip Poker 2004 Crack.exe
    Sims 2 Crack.exe
    Sim Theme Park World no cd crack.exe
    Sim City 4 Deluxe no cd crack.exe
    Sim City 4 - Rush Hour no cd crack.exe
    RoboForm.exe
    RoboForm crack.exe
    RealPlayer.exe
    RealPlayer Crack.exe
    RealPlayer crack (keygen.exe
    PINNACLE STUDIO PLUS V9.3 Crack.exe
    PhotoShop CS v8.0 Crack.exe
    Partition Magic 8.0.exe
    Paris Hilton Sex-E Screensaver 1.0.exe
    NOD32 AntiVirus 2.12.1 Crack.exe
    Nero Burning ROM v6.x crack.exe
    Macromedia Flash SWF-Unprotect v2.0.exe
    Macromedia Flash MX v6.0 crack.exe
    Macromedia Flash All Versions keygen.exe
    Macromedia Flash 8 Crack.exe
    Macromedia Fireworks 4.0 Patch.exe
    Macromedia Dreamweaver UltraDev 4.0 Patch.exe
    Macromedia Dreamweaver MX v6.0 crack.exe
    Macromedia Dreamweaver MX 2004 7.0 Crack.exe
    Macromedia Dreamweaver 4.0 Patch.exe
    Macromedia Director 8 Crack.exe
    Macromedia Contribute v2.0 crack.exe
    Macromedia ColdFusion MX crack.exe
    K-Lite Mega Codec Pack 1.13 Keygen.exe
    K-Lite Codec Pack v2.31 Full Crack.exe
    KaZaA Lite Plus 1.0.exe
    Kazaa Download Manager 3.0.exe
    Kazaa Download Accelerator Pro.exe
    Internet Download Manager v4.02 Crack.exe
    Internet Download Manager 4.03.exe
    FrontPage XP 2002 Crack.exe
    visualroute 9.3g keygen.exe
    visualroute 9.3g crack.exe
    Firefox Setup 1.5.0.3.exe
    opera 9.exe
    CuteFTP 7 Professional crack.exe
    cuteftppro.exe
    Final Fantasy XII crack.exe
    Final Fantasy XI - USA no cd crack.exe
    Final Fantasy VII - Advent Children crack.exe
    fifa 2006.exe
    Fifa 2006 Crack.exe
    eMule.exe
    eMule 0.44b.exe
    divX codec.exe
    DivX Player Crack.exe
    DivX Player (with DivX Codec).exe
    CloneCD KeyGen.exe
    CloneCD 5.x Crack.exe
    Civilization IV.exe
    CD to MP3 Freeware 1.5 .exe
    BitComet.exe
    AOL Instant Messenger (AIM).exe
    All Macromedia Keygen.exe
    Alcohol 120% v1.9.2 build 1705 Crack.exe
    Ahead Nero Burning 7 Ultra
    Agnitum Outpost Firewall 3.51.x Crack.exe
    Ad-aware.exe
    Ad-aware Professional.exe
    Ad-aware Pro Crack.exe
    acdsee 8 Crack.exe
    ABBY FineReader Pro Crack.exe
    3D Studio Max 6 Crack.exe
    windowsxpserial.exe
    wincrack.exe
    windowsvista.exe
    sex.exe
    blacksex.exe
    asiansex.exe
    Eminem.exe
    Britneysex.exe
    BritneySpears.exe
    Xbox360.exe

  13. Displays the following message to the user:



    If the user clicks Yes, it displays the following message:



    If the user clicks Yes, it displays the following message:



  14. Deletes the file of itself that first executed.


Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • 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.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a 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.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. 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.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.

Writeup By: Kazumasa Itabashi

Discovered: July 06, 2006
Updated: February 13, 2007 12:57:22 PM
Type: Worm
Systems Affected: Windows


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

  1. Disable System Restore (Windows Me/XP).
  2. Update the virus definitions.
  3. Run a full system scan.
  4. Delete any values added to the registry.
For specific details on each of these steps, read the following instructions.

1. To disable 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:
Note:
When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

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. To update 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:
    • If you use Norton AntiVirus 2006, Symantec AntiVirus Corporate Edition 10.0, or newer products, LiveUpdate definitions are updated daily. These products include newer technology.
    • If you use Norton AntiVirus 2005, Symantec AntiVirus Corporate Edition 9.0, or earlier products, LiveUpdate definitions are updated weekly. The exception is major outbreaks, when definitions are updated more often.
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. 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 Virus Definitions (Intelligent Updater).

    The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.

3. To run a full system scan
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
  2. Run a full system scan.
  3. If any files are detected, follow the instructions displayed by your antivirus program.

Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode . Once you have restarted in Safe mode, run the scan again.

After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.


4. To delete the value from the registry
Important: 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 subkeys only. For instructions refer to the document: How to make a backup of the Windows registry.
  1. Click Start > Run.
  2. Type regedit
  3. Click OK.

    Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  4. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad

  5. In the right pane, delete the value:

    "(Default)" = "{[RANDOM GUID]}"

  6. Navigate to the subkey:

    HKEY_CLASS_ROOT\CLSID\{[RANDOM GUID]}\InProcSrver32

  7. In the right pane, delete the value:

    "(Default)" = "%System%\[RANDOM].dll"

  8. Navigate to the subkey:

    HKEY_LOCAL_MACHINE_SOFTWARE\Microsoft\Internet Explorer\Main

  9. In the right pane, delete the values:

    "HardNum" = "[RANDOM]"
    "LoadNum" = "[RANDOM]"

  10. Exit the Registry Editor.


Writeup By: Kazumasa Itabashi