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Discovered: September 26, 2003
Updated: February 13, 2007 12:08:27 PM
Type: Worm
Systems Affected: Windows

W32.HLLW.Infex.B@mm is a mass-mailing worm that uses Microsoft Outlook to send itself to all the contacts in Outlook Address Book. The email attachment is q83d.rar.

The subject line is one of the following:

  • 64bit Notepad!
  • Do you Get spam?
  • Usama Bin laden II ?
  • Saddam Dead or Alive?
  • Nelson Mandella dead?
  • Bush Resigns
  • Bill Gates ARRESTED
  • Undocumented Secrets about <%string%>
Where %string% is one of the following:
  • Microsoft
  • Windows
  • Aliens
  • Televisions
  • PayPhones

The worm attempts to spread itself through some file-sharing networks, such as BearShare, eDonkey2000, Gnucleus, Grokster, KaZaA, KaZaA Lite, KMD, Limewire, Morpheus, Overnet, Shareaza, Rapigator, Toadnode, Tesla, WinMX, and XoloX. It also attempts to send itself to other ICQ users.

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

Antivirus Protection Dates

  • Initial Rapid Release version September 29, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version September 29, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date October 01, 2003

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

Writeup By: Yana Liu

Discovered: September 26, 2003
Updated: February 13, 2007 12:08:27 PM
Type: Worm
Systems Affected: Windows

When W32.HLLW.Infex.B@mm runs, it does the following:

  1. Copies itself as %Windir%\Readme.exe.

    Note: %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.

  2. Creates the Script.ini file under one of the following folders. The worm uses this script file to send a copy of itself to other mIRC users who connect to the same channel.
    • C:\Program files\mirc32
    • C:\Program files\mirc
    • C:\mirc32
    • C:\mirc

  3. Creates the file, C:\pirch98\events.ini. The worm uses this file to send a copy of itself to other Pirch users.

  4. Creates the file, %USERPROFILE%\Local Settings\Application Data\Microsoft\CD Burning\Autorun.inf, which contains the text:


    Note: %USERPROFILE% is a variable. For example, in Windows 2000 machine, it can be C:\Documents and Settings\<Current User>.

  5. Copies itself as %USERPROFILE%\Local Settings\Application Data\Microsoft\CD Burning\Fokken.exe.

  6. Copies itself to the following folders, if any exist:

    %ProgramFiles%\Kazaa\My Shared folder
    %ProgramFiles%\KMD\My Shared folder
    %ProgramFiles%\icq\shared files
    %ProgramFiles%\kazaa lite\my shared folders
    %ProgramFiles%\morpheus\my shared folder
    %ProgramFiles%\Grokster\My Grokster
    %ProgramFiles%\WinMX\My Shared Folder

    as one of the following:

    Ebook-txt Harry Potter - Order of the Phoenix.exe
    Ebook-txt Visual Basic dotnet for Dummies.exe
    Ebook-txt Visual C for Dummies.exe
    Ebook-txt Visual Fox Pro for Dummies.exe
    Ebook-txt MCSE Training Guide.exe
    Ebook-txt MCSD Training Guide.exe
    Ebook-txt A Plus Training Guide.exe
    Ebook-txt 50000 Serials.exe
    Ebook-txt Lord of the Rings (All 3 books).exe
    Ebook-txt Mirc Scripting Tutorial.exe
    Ebook-txt Visual Basic 6 for Beginners.exe
    Ebook-txt Hacking WinXp Pro.exe
    Ebook-txt Cracking Tutorial.exe
    Ebook-txt Phreaking for Dummies.exe
    Ebook-txt Java Applets 4 Dummies.exe
    Ebook-txt W32.Fokken.Description.exe
    Ebook-txt The Broken mind of People.exe
    Ebook-txt Mirc Scripting.exe
    Ebook-txt Irc tutorial.exe
    Ebook-txt AtomixMp3 Tips & Tricks.exe
    Ebook-txt Anarchy Cookbook 2003.exe
    Ebook-txt Undocumented Secrets of WinXP.exe
    Ebook-txt 1001 Sexual Stories.exe
    Ebook-txt Win32asm for Dummies.exe
    Ebook-txt Hacking for Beginners.exe
    Ebook-txt Roof on fire.exe
    book-txt Circles in a bush.exe
    Ebook-txt FBI Tricks.exe
    Ebook-txt Swift secrets of Fishing.exe
    Ebook-txt Scubadiving.exe


    Ebook-txt All about <%string%>.exe

    where %string% is one of the following:
    Movie Ripping
    Mp3 Encoding
    Visual Basic
    Kid Care

  7. Archives itself using %ProgramFile%\WinRAR\rar.exe as c:\q83d.rar.

  8. Uses Microsoft Outlook to send itself to all the contacts in the Outlook Address Book. The worm attaches the file, q83d.rar, to the email. The subject line and message body will be one of the following:

    A new Internet worm that is swirming on the net,and is to hit your mailbox. Every 10 minutes 3000 people get infected with the worm
    Still There is no cure for this worm, but this program can prevent it from comming onto Your Computer
    Password for the rar is: 123

    Subject: 64bit Notepad!
    Message:  Hi, this is just a new version of notepad, but this version is 64BIT whereas the older one was 32BIT. Check it out! Password for the rar is: 123

    Subject: Do you Get spam?
    Every Hour 4 million people get spamed, This program is the cure for spam Password for the rar is: 123

    Subject: Usama Bin laden II ?
    This is weird?, Can there be a New Bin Laden That will take over the world? Password for the rar is: 123

    Subject: Saddam Dead or Alive?
    Is Saddam realy Dead or Alive?, well the attachment tells u all about it! Password for the rar is: 123

    Subject: Nelson Mandella dead?
    Message: Is Nelson Mandella dead?, Well the attached file explains it all Password for the rar is: 123

    Subject: Bush Resigns
    The artical included states why he resigned Password for the rar is: 123

    Subject: STOCK MARKET FALLS 80%
    The included document explains the why, who and the what Password for the rar is: 123

    Subject: Bill Gates ARRESTED
    Yesterday Bill Gates got arrested for...(Check the attached file)Password for the rar is: 123

    Subject: Undocumented Secrets about <%string%>
    Message: The attachment file is included to reveal all the secrets, read on! Password for the rar is: 123

    Where %string% is one of the following:
    • Microsoft
    • Windows
    • Aliens
    • Televisions
    • PayPhones

  9. If the current day is the 11th of any month, the worm pings a randomly created IP address.


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: September 26, 2003
Updated: February 13, 2007 12:08:27 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 and delete all the files detected as W32.HLLW.Infex.B@mm.
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.Infex.B@mm, click Delete.

Writeup By: Yana Liu