W32.Lunalight@mm

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Discovered: September 18, 2006
Updated: February 13, 2007 12:58:20 PM
Type: Worm
Systems Affected: Windows


W32.Lunalight@mm is a mass-mailing worm that gathers email addresses from the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version September 19, 2006
  • Latest Rapid Release version July 09, 2018 revision 024
  • Initial Daily Certified version September 19, 2006
  • Latest Daily Certified version July 10, 2018 revision 002
  • Initial Weekly Certified release date September 20, 2006

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

Writeup By: James O'Connor

Discovered: September 18, 2006
Updated: February 13, 2007 12:58:20 PM
Type: Worm
Systems Affected: Windows


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

  1. Copies itself to the following files:

    • %System%\moonlight.scr
    • %UserProfile%\Start Menu\Programs\Startup\adodb.cmd

      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).
    • %UserProfile% is a variable that refers to the current user's profile folder. By default, this is C:\Documents and Settings\[CURRENT USER] (Windows NT/2000/XP).

  2. May then create the following files:

    • system.exe
    • winlogon.exe
    • smss.exe
    • lsass.exe0.cmd
    • 5.exe
    • l.com
    • l.exe
    • adodb.cmd
    • [RANDOM NUMBERS].exe
    • [RANDOM NUMBERS].com
    • [RANDOM NUMBERS].scr
    • [RANDOM NUMBERS AND LETTERS].exe
    • [RANDOM NUMBERS AND LETTERS].com
    • [RANDOM NUMBERS AND LETTERS].scr
    • [RANDOM NUMBERS AND LETTERS].cmd
    • Foto [CURRENT USER].exe
    • Data [CURRENT USER].exe

  3. Creates the files in any folder with the following strings in the name:

    • share
    • upload
    • download

      Note: By copying itself to directories named upload or share, it can spread via P2P file-sharing networks.

  4. Creates the following text files:

    • %System%\crtsys.dll
    • %Windir%MoonLight.txt

      Note: %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

  5. May create randomly named hidden folders in the following locations:

    • %Windir%
    • %System%
    • Any subfolder of %UserProfile%

  6. Copies itself to the above folders. The worm can also name itself after the subfolder in which it is placed. For example:

    %UserProfile%\My Documents\My Music\My Music.exe

  7. Creates the following registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe
    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\titta
    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\titta\version
    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\untukmu2
    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\untukmu2\version

  8. Modifies the value:

    "Start" = "0"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess

  9. Adds the value:

    "Common Startup" = "%System%\33055a"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders

  10. Adds the value:

    "[RANDOM NUMBERS]" = "%Windir%\[RANDOM NUMBERS].exe"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  11. Adds the value:

    "[RANDOM NUMBERS]" = "%System%\[RANDOM NUMBERS].exe"

    to the registry subkey:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

  12. Adds the value:

    "debugger" = "%Windir%\notepad.exe"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe

    Note: The registry changes referencing msconfig.exe or regit.exe.make it impossible to launch msconfig.exe or regit.exe. When the user tries to run the file, it is opened in notepad instead.

  13. Adds the value:

    "AlternateShell" = "[RANDOM NUMBERS].exe"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\SafeBoot

  14. Adds the value:

    "DisableRegistryTools" = "1"

    to the registry subkey:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System

  15. Adds the value:

    "me" = "4"

    to the registry subkeys:

    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\titta\version
    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\untukmu2\version

  16. Modifies the values:

    "(Default)" = "File Folder"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\exefile

  17. Modifies the value:

    "(Default)" = "File Folder"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\scrfile

  18. Modifies the value:

    "UncheckedValue" = "0"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden

  19. Modifies the values:

    "Start" = "4B0564AE"
    "Start" = "FB72F21F"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MSSYCLM

  20. Modifies the values:

    "Hidden" = "1"
    "HideFileExt" = "1"
    "ShowSuperHidden" = "0"

    in the registry subkey:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

  21. Modifies the value:

    "Shell" = "explorer.exe, "C:\Documents and Settings\Administrator\Templates\[RANDOM NUMBERS]\[RANDOM NUMBERS].exe""

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

  22. Modifies the value:

    "AlternateShell" = "[RANDOM NUMBERS].exe"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot

  23. Deletes any registry subkeys with the following strings:

    • SMA_nya_Artika
    • Putri_Indonesia
    • BabelPath
    • Alumni Smansa
    • ViriSetup
    • SMAN1_Pangkalpinang
    • Putri_Bangka
    • SysYuni
    • SysDiaz
    • SysRia
    • Pluto
    • DllHost
    • SaTRio ADie X
    • Tok-Cirrhatus
    • AllMyBallance
    • service
    • MomentEverComes
    • Tok-Cirrhatus-1101
    • TryingToSpeak
    • YourUnintended
    • YourUnintendes
    • lexplorer
    • dkernel
    • Bron-Spizaetus-cgglmmrv
    • Bron-Spizaetus
    • Bron-Spizaetus-cfirltrx
    • ADie suka kamu
    • winfix
    • templog

  24. Deletes any file in %Windir% matching the following strings:

    • windows*
    • ShellNew\*.exe
    • *.exe
    • *.vbs
    • MyHeart.exe
    • KesenjanganSosial.exe
    • FirstLove.exe*
    • eksplorasi*
    • CintaButa*
    • *.pif
    • Romantic*

  25. Monitors running processes and their parameters, and ends any process with CMD in the process name or parameters.

  26. Opens HTTP connections to the following URLS, in order to carry out a Denial of Service attack:

    • www.vaksin.com
    • www.bsi.ac.id
    • www.bp.com

  27. Searches files on the compromised computer and gathers email addresses. The worm avoids email addresses that match the following list:

    • Friendster
    • yahoo
    • gmail
    • login
    • bank
    • hotmail

  28. Uses a built-in SMTP engine to mail itself to the gathered email addresses. The email has the following characteristics:

    Subject:
    One of the following:

    • Tolong Aku..
    • Tolong
    • hey Indonesian porn
    • Agnes Monica pic's
    • Fucking With Me :D
    • please read again what i have written to you
    • Hot ...
    • miss Indonesian
    • Cek This
    • hello
    • Japannes Porn
    • Aku Mencari Wanita yang aku Cintai
    • dan cara menggunakan email mass
    • ini adalah cara terakhirku ,di lampiran ini terdapat
    • foto dan data Wanita tsb Thank's
    • NB:Mohon di teruskan kesahabat anda
    • aku mahasiswa BSI Margonda smt 4
    • yah aku sedang membutuhkan pekerjaan
    • Nana
    • Joe
    • CoolMan
    • oh ya aku tahu anda dr milis ilmu komputer
    • di lampiran ini terdapat curriculum vittae dan foto saya

      From: (Spoofed)
      One of the following:

    • Titta
    • Lanelitta
    • Ami
    • Riri
    • Fransisca
    • Claudia
    • Fransiska
    • Cicilia
    • sisilia
    • Hilda
    • Nadine
    • Ida
    • Julia
    • Vivi
    • Valentina
    • Linda
    • Rita
    • sasuke
    • Davis
    • Anata
    • Emily
    • HellSpawn
    • Lia
    • Fria
    • admin
    • SaZZA
    • Susi
    • Agnes
    • JuwitaNingrum
    • Natalia
    • telkom
    • astaga
    • boleh
    • PLASA
    • indo
    • warung
    • gaul

      The message contains the worm as an executable or in a zipped attachment called MYpIC.zip.

  29. May monitor keystrokes.

  30. May attempt to download and execute the following additional files from www.geocities.com/m00nL19ht2006:

    • update5.txt
    • zipfile2.txt

  31. May attempt to copy itself to the a:\ drive.

  32. May display the following faded image of a girl's face on the computer screen at 10:00 a.m. and 10:00 p.m.:




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: James O'Connor

Discovered: September 18, 2006
Updated: February 13, 2007 12:58:20 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.
  5. Reenable the SharedAccess service (Windows 2000/XP only).
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.
  4. Delete the following non-malicious files:
    • %System%\crtsys.dll
    • %Windir%\MoonLight.txt


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. Download this tool, created by Symantec, to restore the registry editor.
  2. Restart the computer 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.
  3. Run the tool downloaded in step a.
  4. Open Windows Explorer.
  5. Navigate to the following file:

    %Windir%\regedit.exe

  6. Rename the above file to the following:

    re.exe

  7. Click Start > Run.
  8. Type re
  9. Click OK.

  10. Navigate to and delete the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe
    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\titta
    HKEY_CURRENT_USER\Software\VB and VBA Program Settings\untukmu2

  11. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders

  12. In the right pane, delete the value:

    "Common Startup" = "%System%\33055a"

  13. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  14. In the right pane, delete the value:

    "[RANDOM NUMBERS]" = "%Windir%\[RANDOM NUMBERS].exe"

  15. Navigate to the subkey:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

  16. In the right pane, delete the value:

    "[RANDOM NUMBERS]" = "%System%\[RANDOM NUMBERS].exe"

  17. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\SafeBoot

  18. In the right pane, delete the value:

    "AlternateShell" = "[RANDOM NUMBERS].exe"

  19. Navigate to the subkey:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System

  20. In the right pane, delete the value:

    "DisableRegistryTools" = "1"


  21. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\exefile
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\scrfile

  22. In the right pane, restore the following entry to its previous value, if known:

    "(Default)" = "File Folder"

  23. Navigate to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden

  24. Restore the value to its original value, if known:

    "UncheckedValue" = "0"

  25. Modifies the values:

    "Start" = "4B0564AE"
    "Start" = "FB72F21F"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MSSYCLM

  26. Modifies the values:

    "Hidden" = "1"
    "HideFileExt" = "1"
    "ShowSuperHidden" = "0"

    in the registry subkey:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

  27. Modifies the value:

    "Shell" = "explorer.exe, "C:\Documents and Settings\Administrator\Templates\[RANDOM NUMBERS]\[RANDOM NUMBERS].exe""

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

  28. Modifies the value:

    "AlternateShell" = "[RANDOM NUMBERS].exe"

    in the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot

  29. Exit the Registry Editor.

  30. Open Windows Explorer.

  31. Navigate to the following file:

    %Windir%\re.exe

  32. Rename the above file to the following:

    regedit.exe

  33. Exit Windows Explorer.

  34. Restart the computer in Normal 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.

5. To reenable the SharedAccess service (Windows 2000/XP only)
The SharedAccess service is responsible for maintaining Internet Connection Sharing and the Windows Firewall/Internet Connection Firewall applications in Windows. (The presence and names of these applications vary depending on the operating system and service pack you are using.) To protect your computer and maintain network functionality, re-enable this service if you are using any of these programs.


Windows XP Service Pack 2
If you are running Windows XP with Service Pack 2 and are using the Windows Firewall, the operating system will alert you when the SharedAccess service is stopped, by displaying an alert balloon saying that your Firewall status is unknown. Perform the following steps to ensure that the Windows Firewall is re-enabled:
  1. Click Start > Control Panel.

  2. Double-click the Security Center.

  3. Ensure that the Firewall security essential is marked ON.

    Note: If the Firewall security essential is marked on, your Windows Firewall is on and you do not need to continue with these steps.

    If the Firewall security essential is not marked on, click the "Recommendations" button.

  4. Under "Recommendations," click Enable Now. A window appears telling you that the Windows Firewall was successfully turned on.

  5. Click Close, and then click OK.

  6. Close the Security Center.


Windows 2000 or Windows XP Service Pack 1 or earlier
Complete the following steps to re-enable the SharedAccess service:
  1. Click Start > Run.
  2. Type services.msc

    Then click OK.

  3. Do one of the following:
    • Windows 2000: Under the Name column, locate the "Internet Connection Sharing (ICS)" service and double-click it.
    • Windows XP: Under the Named column, locate the "Internet Connection Firewall (ICF) / Internet Connection Sharing (ICS)" service and double-click it.

  4. Under "Startup Type:", select "Automatic" from the drop-down menu.

  5. Under "Service Status:", click the Start button.

  6. Once the service has completed starting, click OK.

  7. Close the Services window.


Writeup By: James O'Connor