W32.HLLW.Redist.C@mm

Printer Friendly Page

Discovered: July 10, 2003
Updated: February 13, 2007 12:03:42 PM
Also Known As: W32/Gant.gen@MM [McAfee]
Type: Worm
Systems Affected: Windows


W32.HLLW.Redist.C@mm is a mass-mailing worm that uses Microsoft Outlook to send itself to all the contacts in the Outlook Address Book. The worm also attempts to spread itself through KaZaA, KaZaA Lite, KMD, LimeWire, Gnucleus, Shareaza, BearShare, Edonkey, Edonkey2000, Morpheus, Grokster, WinMX, Tesla, Overnet, XoloX, Rapigator file-sharing networks, and ICQ.

When W32.HLLW.Redist.C@mm runs, it displays a fake message, titled "Error Starting Program."

The email has the following characteristics:

Subject: Funny picture
Attachment: CartoonComedy.pif

Subject: The passwords
Attachment: PswdLst01.pif

Subject: The file
Attachment: Database<a random number>.pif

Subject: That file
Attachment: Soccer<a random number>.pif

Subject: Fire Screensaver
Attachment: FireScreen.scr

Subject: Stupid picture
Attachment: Armadillo.pif

Subject: Web design
Attachment: WebDesignSetup.exe

This threat is written in the Microsoft Visual Basic programming language and is compressed with UPX.

Antivirus Protection Dates

  • Initial Rapid Release version July 11, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version July 11, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date July 16, 2003

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

Writeup By: Yana Liu

Discovered: July 10, 2003
Updated: February 13, 2007 12:03:42 PM
Also Known As: W32/Gant.gen@MM [McAfee]
Type: Worm
Systems Affected: Windows


When W32.HLLW.Redist.C@mm runs, it does the following:

  1. Displays this fake message:




  2. Copies itself as:

    %Windir%\Ircskins.skn
    %Windir%\Lgnpsp32.exe
    %Windir%\Java\Java32.pif
    %System%\Clspck32.exe
    %System%\Msnotepd32.pif

    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:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

  3. Adds the value:

    "LoginPassport"="%Windir%\Lgnpsp32.exe"

    to the registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that the worm runs each time you start Windows.

  4. Creates %Windows%\Netisp32.vbs.

  5. Adds the value:

    "SystemMap32"="%Windows%\Netisp32.vbs"

    to the registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that the file, %Windows%\Netisp32.vbs, runs each time you start Windows.

  6. Attempts to steal information and save it in the following files:

    %Windir%\Mskmap32.txt
    %Windir%\\Mskmap.txt

    NOTE: These files are not viral by themselves. Therefore, Symantec antivirus products do not detect them. You should manually remove these files if your computer was infected with this worm.

  7. Emails the aforementioned files to Zed_rRlf@hotmail.com.

  8. Creates registry key:

    HKEY_CURRENT_USER\Software\Zed\Outsider

    and adds the following value to this key:

    "Outsider4"="W32/Outsider.D by Zed"

  9. Creates registry key:

    HKEY_CURRENT_USER\Software\Zed\Outsider\Emailndex\WABEmails

  10. Attempts to terminate various processes in memory, including processes that most popular antivirus and firewall programs use, such as:

    _AVP32.EXE
    BLACKICE.EXE
    CFINET32.EXE
    F-AGNT95.EXE
    FINDVIRU.EXE
    FPROT.EXE
    IAMSERV.EXE
    NAVAPW32.EXE
    PAVW.EXE
    PCCWIN98.EXE
    RESCUE.EXE
    SAFEWEB.EXE
    VETTRAY.EXE
    ZONEALARM.EXE

  11. Attempts to close any window whose title is one of the following:

    SCAN
    BLACK ICE
    FIRE
    WORM
    REMOVAL
    FIXTOOL
    MCAFEE
    SECURITY
    PROT
    CILLIN
    VSCAN
    FPROT
    F-PROT
    INOCIT
    TROJAN
    NOD32
    ZONEALARM
    LOCKDOWN
    ICLOAD
    ICSSUPP
    ICSUPP
    TDS2
    AVXMON
    Service:
    ANTI-VIRUS
    REGISTRY EDITOR
    ANTIVIRUS
    ANTI VIRUS
    INOCULATE IT
    VIRUSSCAN
    VIRUS SCAN
    VIRUSES
    SCANNING
    VIRUS
    SCANNER
    FIREWALL
    FIRE WALL
    FIRE-WALL
    BACKDOOR
    MCAFEE SECURITY
    PCCILLIN
    PC CILLIN

  12. Creates the folder, %Windir%\LocalSettings, and copies itself to this folder as the following files:
    2Fast 2Furious (Downloader).pif
    3D Chess 2002 Setup.exe
    3D Fire Screensaver.scr
    3D Ocean Screensaver.scr
    3D Solitaire 2002 Setup.exe
    Adobe Acrobat Reader Full (Downloader).exe
    Age Of Empires 2 CD Crack.exe
    Age Of Empires 2 Expansion CD Crack.exe
    Black Hawk Down (Downloader).pif
    Bruce Almighty (Downloader).pif
    Charlie's Angels Full Throttle (Downloader).pif
    Clone CD Full (Downloader).exe
    Email Spammer 7.0 setup.exe
    GIF Image Designer Setup.exe
    Happy Gilmore (Downloader).pif
    iMesh Adware killer.exe
    Jasc Paint Shop Pro 7 Full (Downloader).exe
    Kazaa Adware killer setup.exe
    Legally Blonde 2 (Downloader).pif
    Lord Of The Rings - Fellowship Of The Ring (Downloader).pif
    Movie - Bad Eggs (Downloader).pif
    Movie - Big Daddy (Downloader).pif
    Movie - Finding Nemo (Downloader).pif
    Movie - Mr Deeds (Downloader).pif
    Movie - Terminator 3 (Downloader).pif
    Movie - The Hulk (Downloader).pif
    Movie - The Italian Job (Downloader).pif
    Norton AntiVirus 2003 Full (Downloader).exe
    Rat Race (Downloader).pif
    Red Alert 2 Full (Downloader).exe
    Return To Castle Wolfenstien Full (Downloader).exe
    Screensaver designer setup.exe
    Sinbad - Legend of the Seven Seas (Downloader).pif
    The Lord of the Rings - The Two Towers (Downloader).pif
    The Matrix Reloaded (Downloader).pif
    VET Anti-virus serial key.pif
    WinAmp 5 Full (Downloader).exe
    Windows XP KeyGen.exe
    Windows XP serial key.pif
    WinZip 8 Full (Dowloader).exe
    WinZip serial key.pif

  13. Adds the value:

    "DlDir1"="%Windir%\LocalSettings"

    to the registry key:

    HKEY_CURRENT_USER\Software\Kazaa\Transfer

    so that other KaZaA users may download files from the folder, %Windir%\LocalSettings.

  14. Searches for the subfolders:
    • Kazaa\My Shared Folder
    • Kazaa Lite\My Shared Folder
    • KMD\My Shared Folder
    • LimeWire\Shared
    • Gnucleus\Downloads
    • Gnucleus\Downloads\Incoming
    • Shareaza\Downloads
    • BearShare\Shared
    • Edonkey2000\Incoming
    • Morpheus\My Shared Folder
    • Grokster\My Grokster
    • WinMX\My Shared Folder
    • Tesla\Files
    • Overnet\Incoming
    • XoloX\Downloads
    • Rapigator\Share
    • ICQ\Shared Files

      under any of the following folders:
    • C:\Program Files
    • C:\Programmer
    • C:\Program
    • C:\Programme
    • C:\Programmi
    • C:\ProgramFiler
    • C:\Programas
    • C:\Archivos De Programa

  15. If the worm finds any of the aforementioned folders, it copies itself to each location as the following:

    Bruce Almighty (Downloader).pif
    Legally Blonde 2 (Downloader).pif
    Movie - Finding Nemo (Downloader).pif
    Movie - Terminator 3 (Downloader).pif
    Movie - The Hulk (Downloader).pif
    Movie - The Italian Job (Downloader).pif
    Sinbad - Legend of the Seven Seas (Downloader).pif

  16. It also copies itself to the following folders as the files:
    • \My Music
    • \My Documents\My Music


Email Routine Details

The worm uses Microsoft Outlook to send itself to all the contacts in the Outlook Address Book.

The email has the following characteristics:

Subject: Funny picture
Message:
Hello,
Check out the cartoon picture in the attachments!
Email me back and tell me what you think :)
Cya!
Attachment: CartoonComedy.pif

Subject: The passwords
Message:
Did you get that password list I sent you yesterday?
If you didn't, it is in the attachments anyway.
Attachment: PswdLst01.pif

Subject: The file
Message:
Here is that file that you asked for yesterday (in attachments).
Attachment: Database<a random number>.pif

Subject: That file
Message:
Sorry if I sent this email late, but here is that file that you asked for about <a random number> days ago.
If you have trouble installing them, just email me back and ask for the help files.
Thanks.
Attachment: Soccer<a random number>.pif

Subject: Fire Screensaver
Message:
Check out this Screensaver of fire! I think that it is one of the best Screensavers that I have ever seen!
Attachment: FireScreen.scr

Subject: Stupid picture
Message:
Check out the stupid picture in the attachments!
Attachment: Armadillo.pif

The worm also uses the created VB script file, %Windir%\Netisp32.vbs, to send itself to all the contacts in the Outlook Address Book.

The email has the following characteristics:

Subject: Web design
Message:
I have noticed that your web page could do with some adjustments.
Try this HTML web designer in the attachments. The web designer is easy to use.
Sorry that I could not include the help files for it, as they were too large to attach to this email message.
Cya!
Attachment: WebDesignSetup.exe

When %Windir%\Netisp32.vbs runs, it copies the worm as %Windir%WebdesignSetup.exe. It attempts to copies the worm to all hard drives and network drives as \PassportSetup.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: Yana Liu

Discovered: July 10, 2003
Updated: February 13, 2007 12:03:42 PM
Also Known As: W32/Gant.gen@MM [McAfee]
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 and delete all the files detected as W32.HLLW.Redist.C@mm
  4. Delete the values that were added to the registry.
  5. Use Windows Explorer and locate and delete certain files.

For specific details on each of these steps, read the following instructions.

1. Disabling 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. 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.Redist.C@mm, click Delete.

4. Deleting the value from the registry

CAUTION : 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, and then click Run. (The Run dialog box appears.)
  2. Type regedit

    Then click OK. (The Registry Editor opens.)

  3. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  4. In the right pane, delete the value:

    "LoginPassport"="%Windir%\Lgnpsp32.exe"
    "SystemMap32"="%Windows%\Netisp32.vbs"

  5. Navigate to the key and delete it:

    HKEY_CURRENT_USER\Software\Zed

  6. Exit the Registry Editor.


5. Using Windows Explorer to locate and delete files
Locate and delete these files:
  • %Windir%\Mskmap32.txt
  • %Windir%\\Mskmap.txt



Writeup By: Yana Liu