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Discovered: September 26, 2003
Updated: February 13, 2007 12:07:21 PM
Type: Worm
Systems Affected: Windows

W32.Kerim@mm is a peer-to-peer worm and mass mailer. The email it attempts to send has the following characteristics:

Subject:   9 Things I Hate About Everybody Else...
Attachment: 9things.scr

This worm is written in Microsoft Visual Basic and is packed with UPX.

Antivirus Protection Dates

  • Initial Rapid Release version September 26, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version September 26, 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: Scott Gettis

Discovered: September 26, 2003
Updated: February 13, 2007 12:07:21 PM
Type: Worm
Systems Affected: Windows

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

  1. Copies itself as C:\Kermit\kermit.exe and C:\Kermit\9things.scr.

  2. Adds the value:

    "Kermit"= C:\kermit\kermit.exe

    to the registry key:


    so that the worm runs when you start Windows.

  3. Attempts to copy itself to the following file-sharing folders:
    • C:\ProgramFiles\Tesla\Files
    • C:\ProgramFiles\kazaa\mysharedfolder
    • C:\ProgramFiles\KMD\mysharedfolder
    • C:\ProgramFiles\kazaalite\mysharedfolder
    • C:\ProgramFiles\XoloX\Downloads
    • C:\ProgramFiles\Edonkey2000\incoming
    • C:\ProgramFiles\Bearshare\Shared
    • C:\ProgramFiles\Shareaza\downloads
    • C:\ProgramFiles\Grokster\mygrokster
    • C:\ProgramFiles\Gnucleus\downloads
    • C:\ProgramFiles\Limewire\shared
    • C:\ProgramFiles\WinMX\mysharedfolder
    • C:\ProgramFiles\morpheus\mysharedfolder
    • C:\ProgramFiles\Ftopia3\Files
    • C:\ProgramFiles\Toadnode\share
    • C:\ProgramFiles\icq\sharedfiles
    • C:\ProgramFiles\Overnet\Incoming
    • C:\ProgramFiles\Rapigator\Share
    • C:\ProgramFiles\AppleJuice\Incoming\


    • Winzip8.exe
    • Winrar3.exe
    • Gta vice city crack.exe
    • F-Prot Crack.exe
    • Norton Antivirus Crack.exe
    • Anna's Virtual Sex.exe
    • Trend Micro Crack.exe
    • Window Blinds Crack.exe
    • Windows Longhorn Crack.exe
    • Teen Sex Screen Saver.scr
    • Gta Vice City NO CD Patch.exe

  4. Attempts to send the following email:

    Subject: 9 Things I Hate About Everybody Else...

    Message Body:

    9 Things I Hate About Everybody Else...

    1. People who point at their wrist while asking for the time.... I know where my watch is pal, where the fuck is yours? Do I point at my crotch when I ask where the toilet is?

    2. People who are willing to get off their arse to search the entire room SEND THIS TO EVERYONE YOU CAN OR ELSE for the tv remote because they refuse to walk to the tv and change the channel manually.

    3. When people say Oh you just want to have your cake and eat it too. Fucking right! What good is a cake if you can't eat it?

    4. When people say it's always the last place you look. Of course it is. Why the fuck would you keep looking after you've found it? Do people do this? Who and where are they?yet?. If the bus came would I be standing here, knobhead?

    5. When people say while watching a film did you see that?. No tosser, I paid 8 to come to the cinema and stare at the fucking floor.

    6. People who ask Can I ask you a question?. Didn't really give me a choice there, did you sunshine?

    7. When something is 'new and improved!'. Which is it? If it's new, then there has never been anything before it. If it's an improvement, then there must have been something before it. OPEN THE SCREEN SAVER THAT IS ATTATCHED THEN

    8. When people say life is short. What the fuck?? Life is the longest damn thing anyone ever fucking does!! What can you do that's longer?

    9. When you are waiting for the bus and someone asks Has the bus come



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: Scott Gettis

Discovered: September 26, 2003
Updated: February 13, 2007 12:07:21 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.Kerim@mm.
  4. Delete the value that was added to the registry.
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.Kerim@mm, click Delete.

4. Deleting the value from the registry

WARNING: 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:


  4. In the right pane, delete the values:

    "Kermit"= C:\kermit\kermit.exe

  5. Exit the Registry Editor.

Writeup By: Scott Gettis