W32.Lovgate.AK@mm

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Discovered: July 28, 2004
Updated: February 13, 2007 12:25:53 PM
Also Known As: W32/Lovgate.q@MM [McAfee], I-Worm.LovGate.gen [Kaspersky]
Type: Worm
Systems Affected: Windows



W32.Lovgate.AK@mm is a variant of W32.Lovgate.W@mm that:

  • Attempts to reply to all the email messages in the Microsoft Outlook inbox.
  • Scans files that have the .txt, .pl, .wab, .adb, .tbb, .dbx, .asp, .php, .sht, and .htm extensions for email addresses.
  • Uses its own SMTP engine to send itself to the addresses that it finds.
  • Attempts to copy itself to Kazaa-shared folders and all the computers on a local network.

The From line of the email is spoofed and the Subject and the Message vary. The attachment name also varies, with a .bat, .cmd, .exe, .pif, or .scr file extension. The worm may also send a .zip file containing the attachment.

This threat is written in the C++ programming language and is compressed with JDPack, ASPack, and UPX.

Antivirus Protection Dates

  • Initial Rapid Release version July 28, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version July 28, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date July 28, 2004

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

Writeup By: Takayoshi Nakayama

Discovered: July 28, 2004
Updated: February 13, 2007 12:25:53 PM
Also Known As: W32/Lovgate.q@MM [McAfee], I-Worm.LovGate.gen [Kaspersky]
Type: Worm
Systems Affected: Windows


When W32.Lovgate.AK@mm runs, it does the following:

  1. Copies itself as the following:
    • %Windir%\SysTra.exe
    • %System%\ravmond.exe
    • %System%\iexplore.exe
    • %System%\WinHelp.exe
    • %System%\kernel66.dll (With attributes set to Read Only, Hidden, and System.)

      Notes:
      • %Windir% is a variable: The worm locates the Windows installation folder (by default, this is C:\Windows or C:\Winnt) and copies itself to that location.
      • %System% is a variable: The worm locates the System folder and copies itself to that location. By default, this is C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

  2. Creates the following files:
    • %System%\ODBC16.dll
    • %System%\msjdbc11.dll
    • %System%\MSSIGN30.DLL
    • %System%\LMMIB20.DLL

      Note: These files are all the same; they are backdoor components of the worm and each 53,760 bytes in size.

  3. Adds the values:

    "Program in Windows"="%system%\iexplore.exe"

    "Protected Storage"="RUNDLL32.exe MSSIGN30.DLL ondll_reg"

    "VFW Encoder/Decoder Settings"="RUNDLL32.exe MSSIGN30.DLL ondll_reg"

    "WinHelp"="%system%\WinHelp.exe"

    to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

    so that the worm runs when you start Windows.

  4. Adds the value:

    "SystemTra"="%Windir%\SysTra.exe"

    to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
    RunServices

    so that the worm runs as a service when you start Windows 95/98/Me.

  5. Adds the value:

    "run"="RAVMOND.exe"

    to the registry key:

    HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows

    so that the worm runs when you start Windows NT/2000/XP.

  6. May create the subkey:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\ZMXLIB1

  7. Inserts the following line in the [Windows] section of Win.ini file:

    run=ravmond.exe

  8. Injects a process-watching routine as a thread into either Explorer.exe or Taskmgr.exe. This remote thread will launch %System%\Iexplore.exe if the worm process is stopped.

  9. Creates a file named AUTORUN.INF in the root folder of all the drives, except the CD-ROM drives, and copies itself as COMMAND.EXE and setup.RAR into that folder.

  10. Terminates all the processes that contain any of the following strings:
    • KV
    • KAV
    • Duba
    • NAV
    • kill
    • RavMon.exe
    • Rfw.exe
    • Gate
    • McAfee
    • Symantec
    • SkyNet
    • rising

  11. Creates a zip file named <filename>.<ext> in the root folder of all the drives, unless the drive letter is A or B.

    <filename> will be one of the following:
    • WORK
    • setup
    • Important
    • bak
    • letter
    • pass

      and <ext> is one of the following:
    • RAR
    • ZIP

      This zip file contains a copy of the worm with the file name <filename>.<ext>.

      <filename> is one of the following:
    • WORK
    • setup
    • Important
    • book
    • email
    • PassWord

      and <ext> is one of the following:
    • .exe
    • .com
    • .pif
    • .scr

  12. Creates the service, "Windows Management Protocol v.0 (experimental)", which is mapped to "Rundll32.exe msjdbc11.dll ondll_server".

  13. Creates the service, "_reg," which is mapped to "Rundll32.exe msjdbc11.dll ondll_server."

  14. Scans all the drives from C to Z. If the drive type is removable, mapped, or fixed, the worm will do the following on all the drives found:
    1. Attempt to rename the extension on all .exe files to .zmx.
    2. Set the attributes to Hidden and System on these files.
    3. Copy itself as the original file name.


      For example, if the worm finds OriginalFile.exe, it will be renamed to OriginalFile.zmx. The worm will then copy itself as OriginalFile.exe.

  15. Runs a Backdoor routine on port 6000. The routine steals information of the infected computer and stores it in the file, C:\Netlog.txt. The worm then sends the stolen information to an email address.

  16. Creates a network share, "Media", which is mapped to "%Windir%\Media".

  17. Copies itself to all network-shared folders and subfolders as any of the following:
    • Thank you.doc.exe
    • 3D Flash Animator.rar.bat
    • SWF Browser2.93.txt.exe
    • Download.exe
    • Panda Crack.zip.exe
    • WinRAR V3.2.0 Beta 2.exe
    • Swish2.00.pif
    • AAdobe Photoshop7.0 creak.pif
    • You_Life.JPG.pif
    • CloneCD crack.exe
    • WinZip v9.0 Beta Build 5480 crack.exe
    • Real-DRAW PRO v3.10.exe
    • Star Wars Downloader.exe
    • HyperSnap-DX v5.20.01.exe
    • Adobe Photoshop6.0.zip.exe
    • HyperSnap-DX v4.51.01.exe

  18. Scans all the computers on the local network and attempts to log on as an Administrator using the following passwords:
    • Guest
    • Administrator
    • zxcv
    • yxcv
    • xxx
    • win
    • test123
    • test
    • temp123
    • temp
    • sybase
    • super
    • sex
    • secret
    • pwd
    • pw123
    • Password
    • owner
    • oracle
    • mypc123
    • mypc
    • mypass123
    • mypass
    • love
    • login
    • Login
    • Internet
    • home
    • godblessyou
    • god
    • enable
    • database
    • computer
    • alpha
    • admin123
    • Admin
    • abcd
    • aaa
    • 88888888
    • 2600
    • 2003
    • 2002
    • 123asd
    • 123abc
    • 123456789
    • 1234567
    • 123123
    • 121212
    • 11111111
    • 110
    • 007
    • 00000000
    • 000000
    • pass
    • 54321
    • 12345
    • password
    • passwd
    • server
    • sql
    • !@#$%^&*
    • !@#$%^&
    • !@#$%^
    • !@#$%
    • asdfgh
    • asdf
    • !@#$
    • 1234
    • 111
    • root
    • abc123
    • 12345678
    • abcdefg
    • abcdef
    • abc
    • 888888
    • 666666
    • 111111
    • admin
    • administrator
    • guest
    • 654321
    • 123456
    • 321
    • 123

      Note:
      The worm will also attempt to log on as "Administrator" if a password is not set for the account on a remote computer.

  19. If the worm successfully logs on to the remote computer, it will attempt to copy itself as:

    \\<remote computer name>\admin$\system32\NetManager.exe

    and to start the file as the service, "Windows Management NetWork Service Extensions," which is mapped to "NetManager.exe -exe_start."

  20. Locates the Kazaa file-sharing folder though a registry key and copies itself to that folder as one of the following:
    • wrar320sc
    • REALONE
    • BlackIcePCPSetup_creak
    • Passware5.3
    • word_pass_creak
    • HEROSOFT
    • orcard_original_creak
    • rainbowcrack-1.1-win
    • W32Dasm
    • setup
    • <random file name>

      with a .bat, .exe, .pif, or .scr file extension.

  21. Retrieves the email addresses from the files with .txt, .pl, .wab, .adb, .tbb, .dbx, .asp, .php, .sht, and .htm file extensions in the following folders:
    • %Windir%\Local Settings
    • \Documents and Settings\<current user>\local settings
    • Temporary Internet Files folder

  22. Retrieves the email addresses from the Windows Address Book files.

  23. Uses its own SMTP engine to send itself to the email addresses that it finds.

    The email has the following characteristics:

    Subject: (One of the following)
    • test
    • hi
    • hello
    • Mail Delivery System
    • Mail Transaction Failed
    • Server Report
    • Status
    • Error

      Message: (One of the following)
    • pass
    • Mail  failed.  For further assistance, please contact!
    • The message contains Unicode characters and has been sent as a binary attachment.
    • It's the long-awaited film version of the Broadway hit. The  message  sent as  a binary attachment.

      Attachment: (One of the following)
    • document
    • readme
    • doc
    • text
    • file
    • data
    • test
    • message
    • body

      with one of the following file extensions:
    • .bat
    • .cmd
    • .exe
    • .pif
    • .scr

  24. Replies to all the incoming messages when they arrive in the mailbox of certain MAPI-compliant email clients, including Microsoft Outlook.
    If the original email is:

    Subject: <subject>
    From: <sender>@<domain.com>
    Message: <original message body>

    the worm will attempt to send the following email:

    Subject: Re: <subject>
    To: <sender>@<domain.com>

    Message:
    '<sender>' wrote:
    ====
    > <original message body>
    ====

    <domain.com> account auto-reply:

     If you can keep your head when all about you
     Are losing theirs and blaming it on you;
     If you can trust yourself when all men doubt you,
     But make allowance for their doubting too;
     If you can wait and not be tired by waiting,
     Or, being lied about,don't deal in lies,
     Or, being hated, don't give way to hating,
     And yet don't look too good, nor talk too wise;
     ... ... more  look to the attachment.


    > Get your FREE <domain.com> account now! <

    Attachment: (One of the following)
    • the hardcore game-.pif
    • Sex in Office.rm.scr
    • Deutsch BloodPatch!.exe
    • s3msong.MP3.pif
    • Me_nude.AVI.pif
    • How to Crack all gamez.exe
    • Macromedia Flash.scr
    • SETUP.EXE
    • Shakira.zip.exe
    • dreamweaver MX (crack).exe
    • StarWars2 - CloneAttack.rm.scr
    • Industry Giant II.exe
    • DSL Modem Uncapper.rar.exe
    • joke.pif
    • Britney spears nude.exe.txt.exe
    • I am For u.doc.exe


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: Takayoshi Nakayama

Discovered: July 28, 2004
Updated: February 13, 2007 12:25:53 PM
Also Known As: W32/Lovgate.q@MM [McAfee], I-Worm.LovGate.gen [Kaspersky]
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. Delete the values from the registry.
  4. Edit the Win.ini file (Windows 95/98/Me).
  5. Restart the computer in Safe mode or VGA mode.
  6. Run a full system scan and delete all the files detected as W32.Lovgate.AK@mm.
  7. Change the .zmx files back to .exe files.
For 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, re-enable 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: 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. 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 keys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

  3. Navigate to the key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

  4. In the right pane, delete the values:

    "Program in Windows"="%system%\iexplore.exe"

    "Protected Storage"="RUNDLL32.exe MSSIGN30.DLL ondll_reg"

    "VFW Encoder/Decoder Settings"="RUNDLL32.exe MSSIGN30.DLL ondll_reg"

    "WinHelp"="%system%\WinHelp.exe"

  5. Follow the steps for your operating system:
    • Windows 95/98/Me. Navigate to the key:

      HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
      RunServices

      In the right pane, delete the value:

      "Systemtra"="%Windir%\Systra.exe"

    • Windows NT/2000/XP. Navigate to the key:

      HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows

      In the right pane, delete the value:

      "run"="RAVMOND.exe"

  6. Exit the Registry Editor.


4. To edit the Win.ini file
If you are running Windows 95/98/Me, follow these steps:
  1. The function you perform depends on your operating system:
    • Windows 95/98: Go to step B.
    • Windows Me: If you are running Windows Me, the Windows Me file-protection process may have made a backup copy of the Win.ini file that you need to edit. If this backup copy exists, it will be in the C:\Windows\Recent folder. Symantec recommends that you delete this file before continuing with the steps in this section. To do this:
      1. Start Windows Explorer.
      2. Browse to and select the C:\Windows\Recent folder.
      3. In the right pane, select the Win.ini file and delete it. The Win.ini file will be regenerated when you save your changes to it in step F.

  2. Click Start > Run.
  3. Type the following:

    edit c:\windows\win.ini

    and then click OK.

    (The MS-DOS Editor opens.)

    NOTE: If Windows is installed in a different location, make the appropriate path substitution.

  4. In the [windows] section of the file, look for a line similar to:

    run=RAVMOND.exe

  5. If this line exists, delete everything to the right of run=

  6. Click File > Save.
  7. Click File > Exit.


5. To restart the computer in Safe mode or VGA mode
Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode or VGA mode.
  • For Windows 95, 98, Me, 2000, or XP users, restart the computer in Safe mode. For instructions, read the document, "How to start the computer in Safe Mode."
  • For Windows NT 4 users, restart the computer in VGA mode

6. To scan for and delete the infected files
  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 as infected with W32.Lovgate.AK@mm, click Delete.
  4. Restart the computer in Normal mode. For instructions, read the section on returning to Normal mode in the document, "How to start the computer in Safe Mode."

7. To change the .zmx files to .exe files
Because W32.HLLW.Lovgate.AK@mm changes .exe file extensions to .zmx, you must either restore the .exe file extension or re-install the programs. (In many cases, it may be easier to re-install the software.)
  1. Follow the instructions for your operating system:
    • Windows 98/Me/2000
      1. On the Windows desktop, click the Start button > Find or Search > Files or Folders.
      2. In the Search Results window, set "Look in" to the first removable, mapped, or fixed drive type with a drive letter greater than E.
      3. Check Include subfolders.
      4. In the "Named" or "Search for..." box, type, or copy and paste, the following:

        *.zmx

      5. Click Find Now or Search Now.

    • Windows XP
      1. On the Windows desktop, click the Start button > Search.
      2. Click All files and folders.
      3. In the "All or part of the file name" box, type, or copy and paste, the following:

        *.zmx

      4. Verify that "Look in" is set to the first removable, mapped, or fixed drive type with a drive letter greater than E.
      5. Click More advanced options.
      6. Select Search system folders.
      7. Select Search subfolders.
      8. Select Search hidden files and folders.
      9. Click Search.

  2. For every file that is found, right-click it > Rename. Change the .zmx extension to .exe.

  3. Repeat step 6 for every removable, mapped, or fixed drive type with a drive letter greater than E.


Writeup By: Takayoshi Nakayama