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Discovered: July 07, 2006
Updated: February 13, 2007 12:57:32 PM
Type: Worm
Systems Affected: Windows

W32.Jalabed.B@mm a mass-mailing worm that sends a copy of itself to email addresses gathered from the compromised computer. The worm also spreads through mIRC.

Antivirus Protection Dates

  • Initial Rapid Release version July 08, 2006
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version July 08, 2006
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date July 12, 2006

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

Technical Description

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

  1. Creates the following files:

    • %Windir%\kh4l3d.txt
    • %Windir%\arabic.exe
    • %Windir%\usefull.txt.exe
    • %Windir%\FIFA 2006 Ticket.doc.exe
    • %Windir%\mail.vbs

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

  2. Adds the value:

    "4r4bic h4x0r" = "%Windir%\arabic.exe"

    to the following registry subkeys:


    so that it runs every time Windows starts.

  3. Creates the IRC script file C:\mirc\script.ini, which causes mIRC to monitor all IRC channels that is being used. When a new user joins any of the monitored channels, the user is sent a copy of usefull.txt.exe through DCC.

  4. If the user responds with a message containing one of the following words, the script attempts to shutdown mIRC:

    • Virus
    • Worm
    • Virii
    • infected
    • Antivirus

  5. Searches for the Kazaa transfer folder and copies itself there as one of the following:

    • BattleField2 Crack.exe
    • Data Stealer.exe
    • MSN Pass Stealer.exe
    • Synflooder.exe
    • IP Bomber.exe
    • Cracker.exe
    • Setup.exe
    • Java in 24 hours.zip.exe
    • Flasher.exe
    • Pennis Enlargemet Tutorial.txt.exe
    • Porn Hacker.zip.exe
    • IP Hider.exe
    • Bomber.exe
    • Best Porn Sites.txt.exe
    • Kazaa Download Speed.txt.exe
    • FBI Hack.zip.exe
    • Dirty Tricks.zip.exe
    • Chat Nuker.exe
    • ICQ Fucker.exe
    • Sub 7 2.5.zip.exe
    • Hider.exe
    • Enlargement.txt.exe
    • Best Of Porn.mpg.exe
    • Pamela Anderson.jpg.exe
    • Jelo.jpg.exe
    • Paris Hilton.jpg.exe
    • One Night in Paris.mpg.exe
    • Sexy Sport Clips.mpg.exe
    • Howto be a PIMP.txt.exe
    • Secrets of Sex.txt.exe
    • School Pc Fucker.zip.exe
    • Driver3.exe
    • IP Stealer.zip.exe
    • Hot Video Clip.mpg.exe
    • Naked Anastacia.jpg.exe
    • Group Sex.jp.exe
    • Howto Hacker.txt.exe
    • Hacking Government.txt.exe
    • Howto Find IP.txt.exe
    • Stealth Portscanner.exe
    • C Sources.zip.exe
    • Mytob Source.txt.exe
    • IIS hacker.zip.exe
    • Howto Hack.zip.exe
    • Saver.zip.exe
    • Hacking Webserver.txt.exe
    • FBI Hacking tip.zip.exe
    • Hacker Tool Set.zip.exe
    • Killer.exe
    • Call of Duty Crack.exe
    • MOHAA Crack.exe
    • BattleFront2 Crack.exe
    • NBA 2006 Crack.exe
    • MP3 Compresser.zip.exe
    • RM Converter.zip.exe
    • Sexy Screensaver.exe
    • Anonym Proxy.exe
    • Steganos IP Bomber.exe
    • IP Shocker.exe
    • TCP Hijacker.exe
    • ICMP Flooder.exe
    • ICQ Fucker.exe
    • MSN Nuker.exe
    • MSN IP Finder.exe
    • MSN Chat Flooder.exe
    • MSN Contact Fucker.exe
    • FAKE SERVER.exe
    • HTTP RAT Client.exe
    • Optix Trojan.zip.exe
    • Viruses.zip.exe
    • Worm Sources.zip.exe
    • Porno.jpg
    • Nacked.jp.exe
    • Lesbian in Bathroom.mpg.exe
    • Hardcore Sex.mpg.exe
    • Muschi.jpg.exe
    • Nacked.mpg.exe
    • Tatu lesbian video.mpg.exe
    • Anna kournikova.mpg.exe
    • Anna Kournikova Nacked.jpg.exe
    • Britney Nacked.jpg.exe
    • Christina Aguilera Caught by Spycam.mpg.exe
    • Muschis.jpg.exe
    • Pussy.jpg.exe
    • Cracking Tutorial.zip.exe
    • Nigger Sex.mpg.exe
    • Black fucking white.mpg.exe
    • italain blow job.mpg.exe
    • Blow Job.mpg.exe
    • Summer Blow job.mpg.exe
    • Sexy.jpg.exe
    • Latein Hardcore.mpg.exe
    • Spain Group Sex.mpg.exe
    • Girl with dildo.mpg.exe
    • Trouble Maker.exe
    • Sex in Forest.mpg.exe
    • Sex in Toilet.mpg.exe
    • Sexy Airline Sex.mpg.exe
    • Nacked Airline Crew.jp.exe
    • Sex.mpg.exe
    • Sex.mpeg.exe
    • Sex.wma
    • Sex.wmv.exe
    • Porn.wma.exe
    • Porn.mpg.exe
    • Porn.mpeg.exe

  6. Searches for email addresses from the Windows Address Book.

  7. Sends itself as an attachment to all emails addresses that it finds. The email has the following characteristics:


    Im the winner of 2 FIFA tickets

    Message Body: 
    You wont believe it but im the winner of 2 tickets for FIFA 2006 in Germany,if you want a ticket read attackment ;)

    FIFA 2006 Ticket.doc.exe

  8. Searches for and overwrites the following file: C:\inetpub\wwwroot\index.html.


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.


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.
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:
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.

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. Click Start > Run.
  2. Type regedit
  3. Click OK.

    Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  4. Navigate to the subkey:


  5. In the right pane, delete the value:

    "4r4bic h4x0r" = "%Windir%\arabic.exe"

  6. Exit the Registry Editor.

Writeup By: Hiroshi Shinotsuka