W32.Lovgate.R@mm

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Discovered: April 05, 2004
Updated: February 13, 2007 12:20:51 PM
Also Known As: W32/Lovgate.x@MM [McAfee], I-Worm.LovGate.w [Kaspersky]
Type: Worm
Systems Affected: Windows


W32.Lovgate.R@mm is a variant of W32.Lovgate@mm . It is also a mass-mailing worm that attempts to email itself to all the email addresses that it finds on the computer.

W32.Lovgate.R@mm spreads through the DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026 ) using TCP port 135.

The "sender" of the email is spoofed, and the subject line and message body of the email vary.

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


Antivirus Protection Dates

  • Initial Rapid Release version April 05, 2004
  • Latest Rapid Release version June 16, 2018 revision 018
  • Initial Daily Certified version April 05, 2004
  • Latest Daily Certified version June 17, 2018 revision 001
  • Initial Weekly Certified release date April 05, 2004

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

Writeup By: Yuhui Huang

Discovered: April 05, 2004
Updated: February 13, 2007 12:20:51 PM
Also Known As: W32/Lovgate.x@MM [McAfee], I-Worm.LovGate.w [Kaspersky]
Type: Worm
Systems Affected: Windows


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

  1. Copies itself as these files:
    • %Windir%\Systra.exe
    • %System%\Hxdef.exe
    • %System%\iexplore.exe
    • %System%\RAVMOND.exe
    • %System%\Kernel66.dll, with attributes set to Read Only, Hidden, and System.
    • %System%\WinHelp.exe

      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 files:
    • %System%\ODBC16.dll (53,760 bytes)
    • %System%\Msjdbc11.dll (53,760 bytes)
    • %System%\MSSIGN30.DLL (53,760 bytes)
    • %System%\LMMIB20.DLL (53,760 bytes)

      These files are all the same—they are backdoor components of the worm.

  3. Creates and executes the file, %System%\NetMeeting.exe (61,440 bytes). When NetMeeting.exe runs, it does the following:
    1. Copies itself as %System%\spollsv.exe.
    2. Adds the value:

      "Shell Extension" = "%system%\spollsv.exe"

      to the registry key:

      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

      so that the worm runs when you start Windows.

    3. Attempts to create %System%\a in other systems using the Microsoft Windows DCOM RPC Interface Buffer Overrun Vulnerability. This file is an FTP script used to get hxdef.exe from an infected system.

    4. May create these files in the %System% folder:
      • results.txt
      • win2k.txt
      • winxp.txt

        These files are not viral by themselves, and as such, are not detected.

  4. Adds the values:

    "Hardware Profile"="%System%\hxdef.exe
    "Microsoft NetMeeting Associates, Inc."="NetMeeting.exe"
    "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.

  5. 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.

  6. Adds the values:

    "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.

  7. May create the subkey:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
    ZMXLIB1

  8. Stops the following services:
    • Rising Realtime Monitor Service
    • Symantec Antivirus Server
    • Symantec Client

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

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

  11. 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

  12. Runs a Backdoor routine on port 6000. The routine steals the information of a compromised system and stores it in the file, C:\Netlog.txt. The worm then emails the stolen information to the attacker.

  13. Copies itself to all the network-shared folders and subfolders as any of the following:
    • WinRAR.exe
    • Internet Explorer.bat
    • Documents and Settings.txt.exe
    • Microsoft Office.exe
    • Windows Media Player.zip.exe
    • Support Tools.exe
    • WindowsUpdate.pif
    • Cain.pif
    • MSDN.ZIP.pif
    • autoexec.bat
    • findpass.exe
    • client.exe
    • i386.exe
    • winhlp32.exe
    • xcopy.exe
    • mmc.exe

  14. Scans all the computers on the local network, and uses the following passwords to attempt to log in as "Administrator."
    • 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
    • 2004
    • 2003
    • 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 in as "Administrator" if a password is not set for the account on a remote computer.

  15. 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."

  16. Injects a thread into Explorer.exe or Taskmgr.exe. If the thread detects that the worm is not running or has been deleted, it will attempt to copy and execute itself.

  17. Starts an FTP server on a random port, no authentication required, which means that the infected computer is accessible to anyone.

  18. Creates a network share, "Media," which points to "%Windir%\Media."

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

    <filename> is 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

  20. Creates the file, Autorun.inf, in the root folder of all the drives, except the CD-ROM drives, and copies itself as Command.com into that folder.

    Note: If you double-click on the disk icon, the worm will be executed.

  21. Scans all the drives, if the drive type is removable or mapped or the drive type is fixed with a drive letter greater than E.

    The worm will do the following on all the found drives:
      • Attempts to rename the extension on all .exe files to .zmx.
      • Sets the attributes to Hidden and System on these files.
      • Copies 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.

  22. Attempts to spread to other computers by exploiting the DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026) using TCP port 135.

  23. 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: <someone>@<somewhere.com>
    Message: <original message body>

    the worm will attempt to send the following email:

    Subject: Re: <subject>
    To: <someone>@<somewhere.com>
    Message:
    '<someone>' wrote:
    ====
    > <original message body>
    >
    ====

    <sender's domain> account auto-reply:

    followed by one of the following:
    • 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 <sender's domain>now! <

      Attachment: The attachment is 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

  24. Scans the system WAB file, temporary Internet files, and all the fixed and ram disks, and it sends itself to all the email addresses that it found.

  25. If the drive is a hard drive or RAM drive, it will retrieve the email addresses from all the files on drives C to Y, which have these extensions:
    • .txt
    • .htm
    • .sht
    • .php
    • .asp
    • .dbx
    • .tbb
    • .adb
    • .pl
    • .wab

  26. Uses its own SMTP engine to send itself to the email addresses that it finds in steps 25 and 26.

    The email is:

    From: The sender's name is randomly selected from a list that the worm carries.

    Subject: The subject line is one of the following:
    • test
    • hi
    • hello
    • Mail Delivery System
    • Mail Transaction Failed
    • Server Report
    • Status
    • Error

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

      Attachment: Randomly constructed file name, with the following extensions:
    • .exe
    • .scr
    • .pif
    • .cmd
    • .bat
    • .zip
    • .rar


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: Yuhui Huang

Discovered: April 05, 2004
Updated: February 13, 2007 12:20:51 PM
Also Known As: W32/Lovgate.x@MM [McAfee], I-Worm.LovGate.w [Kaspersky]
Type: Worm
Systems Affected: Windows


Removal using the W32.HLLW.Lovgate Removal Tool
Symantec Security Response has developed a removal tool to clean the infections of W32.HLLW.Lovgate.R@mm. Try this removal tool first, as it is the easiest way to remove this threat.

Manual Removal
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. Restart the computer in Safe mode or VGA mode.
  4. Reverse the changes made to the registry.
  5. Run a full system scan and delete all the files detected as W32.Lovgate.R@mm.
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:
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 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.

4. To reverse the changes made to 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:

    "Hardware Profile"="%System%\hxdef.exe
    "Microsoft NetMeeting Associates, Inc."="NetMeeting.exe"
    "Program in Windows"="%System%\IEXPLORE.EXE"
    "Protected Storage"="RUNDLL32.EXE MSSIGN30.DLL ondll_reg"
    "Shell Extension"="%System%\spollsv.exe"
    "VFW Encoder/Decoder Settings"="RUNDLL32.exe MSSIGN30.DLL ondll_reg"
    "WinHelp"="%System%\WinHelp.exe"

  5. Do one of the following:
    • If you use Windows 95/98/Me, proceed with step f.
    • If you use Windows NT/2000/XP, proceed with step g.

  6. Navigate to the key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
    RunServices

    In the right pane, delete the value:

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

    Then proceed with step h.

  7. Navigate to the key:

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

    In the right pane, delete the following value:

    "run"="RAYMOND.exe"

  8. Navigate to the key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services

    In the left-hand pane, delete the key "_reg"

  9. Navigate to the key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services

    In the left-hand pane, delete the key "Windows Management Protocol v.0(experimental)"

  10. Exit the Registry Editor.

5. 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.R@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."



Writeup By: Yuhui Huang