W32.HLLW.Lovgate.J@mm

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Discovered: May 22, 2003
Updated: February 13, 2007 12:01:37 PM
Also Known As: W32/Lovgate.l@M [McAfee], I-Worm.LovGate.i [KAV], Win32.Lovgate.J [CA]
Type: Worm
Systems Affected: Windows



W32.HLLW.Lovgate.J@mm is a variant of W32.HLLW.Lovgate.I@mm . It has been repacked to make it difficult for existing antivirus software to detect.

W32.HLLW.Lovgate.J@mm is also a mass-mailing worm that attempts to email itself to all the email addresses it finds in the files whose extensions start with "ht." The subject and attachment of the incoming email are chosen from a predetermined list.

W32.HLLW.Lovgate.J@mm attempts to copy itself to all the computers on a local network, and then infect these computers. The worm also has Backdoor Trojan capabilities. By default, the Trojan component listens on port 10168.

If the infected computer runs Windows NT, 2000, or XP, the worm will attempt to disguise itself as the normal Windows process, "LSASS.EXE."

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

Antivirus Protection Dates

  • Initial Rapid Release version May 22, 2003
  • Latest Rapid Release version August 08, 2016 revision 023
  • Initial Daily Certified version May 22, 2003
  • Latest Daily Certified version August 09, 2016 revision 001
  • Initial Weekly Certified release date May 22, 2003

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

Writeup By: Jari Kytojoki

Discovered: May 22, 2003
Updated: February 13, 2007 12:01:37 PM
Also Known As: W32/Lovgate.l@M [McAfee], I-Worm.LovGate.i [KAV], Win32.Lovgate.J [CA]
Type: Worm
Systems Affected: Windows


When W32.HLLW.Lovgate.J@mm is executed, it does the following:

  1. Copies itself to the %System% folder as these files:

    NOTE: %System% is a variable. The worm 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).
    • Ravmond.exe
    • Iexplore.exe
    • WinGate.exe
    • WinDriver.exe
    • Winrpc.exe
    • Winhelp.exe
    • winexe.exe
    • Kernel66.dll (with attributes set to Read Only, Hidden, and System)

  2. Copies the files, which may have the following names, to the %System% folder, and then executes them:
    • Task688.dll, which is detected as W32.HLLW.Lovgate.H@mm.
    • ily668.dll, which is detected as W32.HLLW.Lovgate.H@mm.
    • Reg678.dll, which is detected as W32.HLLW.Lovgate.H@mm.
    • Win32vxd.dll, which is detected as Infostealer.

  3. Adds the values:

    "Program in Windows"="%system%\iexplore.exe
    "Remote Procedure Call Locator"="rundll32.exe reg678.dll ondll_reg"
    "WinGate initialize"="%system%\WinGate.exe -remoteshell"
    "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:

    "run"="RAVMOND.EXE"

    to the registry key:

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

  5. Changes the (Default) value of the registry key:

    HKEY_CLASSES_ROOT\exefile\shell\open\command

    to:

    winexe.exe %1

    so that the worm runs when you open any .exe file.

  6. Changes the (Default) value of the registry key:

    HKEY_CLASSES_ROOT\txtfile\shell\open\command

    to:

    winrpc.exe %1

    so that the worm runs when you open any text file.

  7. Copies itself to all the network-shared folders and subfolders as any of the following:
    • Are you looking for Love.doc.exe
    • Autoexec.bat
    • The world of lovers.txt.exe
    • How To Hack Websites.exe
    • Panda Titanium Crack.zip.exe
    • Mafia Trainer!!!.exe
    • 100 free essays school.pif
    • AN-YOU-SUCK-IT.txt.pif
    • Sex_For_You_Life.JPG.pif
    • CloneCD + crack.exe
    • Age of empires 2 crack.exe
    • MoviezChannelsInstaler.exe
    • Star Wars II Movie Full Downloader.exe
    • Winrar + crack.exe
    • SIMS FullDownloader.zip.exe
    • MSN Password Hacker and Stealer.exe

  8. Listens on TCP ports 1092, 20168, and 6000, and then notifies the worm's creator using the email addresses at 163.com, yahoo.com.cn, and sina.com.

  9. Runs a password authentication routine, contained in the worm, on port 1092. After entering the correct password, the worm starts a command shell for the author of the worm.

  10. Starts a listening server that provides a command shell on port 20168, without requiring any authentication.

  11. Contains an incomplete function, which appears to be the start of the Backdoor routine, on port 6000. Due to bugs in the worm, the routine may not properly operate. The routine may cause the file, C:\Netlog.txt, to be created with plain text data.

  12. Attempts to gather all the email addresses from HTML files and replies to all the incoming messages when they arrive in the Microsoft Outlook Inbox. Refer to the section, "Email routine details," for additional information.

  13. Scans all the computers on the local network, using the following passwords, to attempt to log on as "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 the remote computer.

  14. If the worm successfully logs on to the remote computer, it attempts to copy itself as:

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

    It will also start the file as the service, "Microsoft NetWork FireWall Services."

  15. Creates the service, "Windows Management Instrumentation Driver Extension," which is mapped to %System32%\WinDriver.exe.

  16. Creates the service, "NetMeeting Remote Desktop (RPC) Sharing," which is mapped to "Rundll32.exe task688.dll ondll_server."

  17. Registers itself as a service, allowing it to continue running even if you log off.

  18. Injects a Backdoor routine as a thread into Lsass.exe, which listens on port 1092.

  19. Injects a Backdoor routine as a thread into Lsass.exe, which listens on port 20168.

  20. Injects a process-watching routine as a thread into either Explorer.exe or Taskmgr.exe. This remote thread will launch %System32%\Iexplore.exe if the worm process is stopped.

  21. The worm monitors the remote thread in either Explorer.exe or Taskmgr.exe. If the thread is stopped, the worm will re-inject the thread into Explorer.exe or Taskmgr.exe. The worm attempts this routine to remain active on the system if a portion of the worm is stopped.

  22. Creates an event under the name, "I---WORM---IPC-20168," to signify that the worm is already running.

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

  24. Creates a network share "GAME," which points to "%Windir%\Temp," and then copies itself to that location as:
    • <random.name>.txt.exe
    • <random.name>.jpg.exe
    • <random.name>.mp3.exe
    • <random.name>.htm.exe
    • <random.name>.rm.exe
    • <random.name>.avi.exe
    • <random.name>.doc.exe
    • <random.name>.gif.exe
    • <random.name>.dat.exe

  25. Inserts the Drwtsn16.exe file in the %Windir" folder.

  26. Executes Drwtsn16.exe to infect all the .exe files on the local hard drives and network-shared folders. These files are detected and repaired as W32.HLLW.Lovgate.G.


Email routine details
There are two possible email routines.

Routine 1
The email messages will be formatted as follows:

Subject: The subject will be one of the following:
    • Reply to this!
    • Let's Laugh
    • Last Update
    • for you
    • Great
    • Help
    • Attached one Gift for u..
    • Hi Dear
    • See the attachement

Message: The message will be one of the following:
    • For further assistance, please contact!
    • Copy of your message, including all the headers is attached.
    • This is the last cumulative update.
    • Tiger Woods had two eagles Friday during his victory over Stephen Leaney. (AP Photo/Denis Poroy)
    • Send reply if you want to be official beta tester.
    • This message was created automatically by mail delivery software (Exim).
    • It's the long-awaited film version of the Broadway hit. Set in the roaring 20's, this is the story of Chicago chorus girl Roxie Hart (Zellweger), who shoots her unfaithful lover (West).
    • Adult content!!! Use with parental advisory.
    • Patrick Ewing will give Knick fans something to cheer about Friday night.
    • Send me your comments...

Attachment: The attachment, which is a copy of the worm, will be one of the following:
    • About_Me.txt.pif
    • Driver.exe
    • Doom3 Preview!!!.exe
    • Enjoy.exe
    • YOU_are_FAT!.TXT.pif
    • Source.exe
    • Interesting.exe
    • README.TXT.pif
    • Images.pif
    • Pics.ZIP.scr


Routine 2
The email message will be formatted as follows:

Subject: Re: <Original Subject>

Message:
<someone> wrote:
===
> <original message body>
>
===
<original sender> auto-reply:

> Get your FREE <original sender hostname> now! <

 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.

Attachment: The attachment, which is a copy of the worm, will be 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: Jari Kytojoki

Discovered: May 22, 2003
Updated: February 13, 2007 12:01:37 PM
Also Known As: W32/Lovgate.l@M [McAfee], I-Worm.LovGate.i [KAV], Win32.Lovgate.J [CA]
Type: Worm
Systems Affected: Windows


Removal using the W32.HLLW.Lovgate Removal Tool
This is the easiest way to remove this threat. Symantec Security Response has created a W32.HLLW.Lovgate Removal Tool .

Manual Removal
As an alternative to using the removal tool, you can manually remove this threat.

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

1. Reverse the changes that the worm made to the registry and restart the computer.
2. Update the virus definitions.
3. Run a full system scan and delete all the files detected as W32.HLLW.Lovgate.J@mm, W32.HLLW.Lovgate.H@mm, or Infostealer.
Repair those detected as W32.HLLW.Lovgate.G.


1. Reverse the changes made to the registry
Because the worm modified the registry so that you cannot run the .exe files, first make a copy of the Registry Editor as a file with the .com extension, and then run the file.

  1. Perform one of the following, depending on which version of Windows you are running:
    • Windows 95/98 users
      1. Click Start.
      2. Point to Programs.
      3. Click the MS-DOS Prompt. (A DOS window opens at the C:\Windows prompt.) Proceed to step b of this section.
    • Windows Me users
      1. Click Start.
      2. Point to Programs.
      3. Point to Accessories.
      4. Click the MS-DOS Prompt. (A DOS window opens at the C:\Windows prompt.) Proceed to step b of this section.
    • Windows NT/2000 users
      1. Click Start, and then click Run.
      2. Type command, and then press Enter. (A DOS window opens.)
      3. Type cd \winnt, and then press Enter.
      4. Go to step b of this section.
    • Windows XP users
      1. Click Start, and then click Run.
      2. Type command, and then press Enter. (A DOS window opens.)
      3. Type the following:

        cd\
        cd \windows

        Press Enter after typing each one.
      4. Proceed to step b of this section.

  2. Type copy regedit.exe regedit.com, and then press Enter.

  3. Type start regedit.com, and then press Enter. (The Registry Editor will open in front of the DOS window.)

    After you finish editing the registry, exit the Registry Editor, and then exit the DOS window as well.

  4. Before continuing, 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. For instructions, read the document, "How to make a backup of the Windows registry."

  5. Navigate to and select the key: HKEY_CLASSES_ROOT\exefile\shell\open\command.

    NOTE: The HKEY_CLASSES_ROOT\ key contains many subkey entries that refer to other file extensions. One of these file extensions is .exe. Changing this extension can prevent any files ending with a .exe extension from running. Make sure that you completely browse throughout this path until you reach the \command subkey.

    Modify the HKEY_CLASSES_ROOT\exefile\shell\open\command subkey, shown in the following figure:

    <<=== NOTE: Modify this key.

  6. In the right pane, double-click the (Default) value.

  7. Delete the current value data, and then type: "%1" %* (That is, type the characters: quote-percent-one-quote-space-percent-asterisk).

  8. Navigate to and select the key: HKEY_CLASSES_ROOT\txtfile\shell\open\command.

  9. In the right pane, double-click the (Default) value.

  10. Delete the current value data, and then type: "%1" %* (That is, type the characters: quote-percent-one-quote-space-percent-asterisk).

    NOTES
    • Under Windows 95/98/Me/NT, the Registry Editor automatically encloses the value within quotation marks. When you click OK, the (Default) value should look exactly like this:

      ""%1" %*"  
    • Under Windows 2000/XP, the additional quotation marks will not appear. When you click OK, the (Default) value should look exactly like this:

      "%1" %*
    • Make sure that you completely delete all the value data in the command key before typing the correct data. If you leave a space at the beginning of the entry, any attempt to run the program files will result in the error message, "Windows cannot find .exe." If this occurs, restart the entire process from the beginning of this document and make sure that you completely remove the current value data.

  11. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  12. In the right pane, delete the values:

    Program in Windows
    Remote Procedure Call Locator
    WinGate initialize
    winhelp

  13. Navigate to the key:

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

  14. In the right pane, delete the value: run

  15. Exit the Registry Editor.

  16. Restart the computer.

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. Scanning for and deleting 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.HLLW.Lovgate.J@mm, W32.HLLW.Lovgate.H@mm, or Infostealer, click Delete.
    If any files are detected as infected with W32.HLLW.Lovgate.G, click Repair.


Writeup By: Jari Kytojoki