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Discovered: February 02, 2006
Updated: February 13, 2007 12:51:01 PM
Also Known As: Bloodhound.Beagle, WORM_BAGLE.CL [Trend Micro]
Type: Worm
Systems Affected: Windows

W32.Beagle.DM@mm is a mass-mailing worm that uses its own SMTP engine to spread to peer-to-peer and file-sharing networks. It attempts to lower security settings and may also download and execute remote files.

Note: Virus definitions dated prior to February 2, 2006 detect this as Bloodhound.Beagle.

Antivirus Protection Dates

  • Initial Rapid Release version February 02, 2006
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 02, 2006
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date February 02, 2006

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

Writeup By: Heather Shannon

Discovered: February 02, 2006
Updated: February 13, 2007 12:51:01 PM
Also Known As: Bloodhound.Beagle, WORM_BAGLE.CL [Trend Micro]
Type: Worm
Systems Affected: Windows

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

  1. Copies itself as %System%\sysformat.exe.

    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).

  2. Adds the value:

    "sysformat" = "%System%\sysformat.exe"

    to the registry subkey:


    so that it runs every time Windows starts.

  3. Adds the value:

    "Start" = "4"

    to the registry subkey:


  4. Adds the values:

    "FirstRun" = "1"
    "Riga" = "[RANDOM VALUE]"

    to the registry subkey:


  5. Contacts the following domains and may attempt to download a remote file:

    • [http://]www.google.com/[REMOVED]
    • on port 53

  6. Attempts to delete the following registry entries:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"My AV"
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"My AV"
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"ICQ Net"
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"ICQ Net"

  7. Gathers email addresses from files with the following extensions on the compromised computer:

    • .wab
    • .txt
    • .msg
    • .htm
    • .shtm
    • .stm
    • .xml
    • .dbx
    • .mbx
    • .mdx
    • .eml
    • .nch
    • .mmf
    • .ods
    • .cfg
    • .asp
    • .php
    • .pl
    • .wsh
    • .adb
    • .tbb
    • .sht
    • .xls
    • .oft
    • .uin
    • .cgi
    • .mht
    • .dhtm
    • .jsp

      Avoids sending email messages to addresses containing any of the following strings:

    • @microsoft
    • rating@
    • f-secur
    • news
    • update
    • anyone@
    • bugs@
    • contract@
    • feste
    • gold-certs@
    • help@
    • info@
    • nobody@
    • noone@
    • kasp
    • admin
    • icrosoft
    • support
    • ntivi
    • unix
    • bsd
    • linux
    • listserv
    • certific
    • sopho
    • @foo
    • @iana
    • free-av
    • @messagelab
    • winzip
    • google
    • winrar
    • samples
    • abuse
    • panda
    • cafee
    • spam
    • pgp
    • @avp.
    • noreply
    • local
    • root@
    • postmaster@

  8. Sends a copy of itself to the email addresses gathered. The email message constructed by the worm typically has the following characteristics:

    From: [SPOOFED]

    One of the following:

    • Delivery service mail
    • Delivery by mail
    • Registration is accepted
    • Is delivered mail
    • You are made active

      Message Body:
      One of the following:

    • Thanks for use of our software.
    • Before use read the help

      One of the following:

    • wsd01.zip
    • viupd02.zip
    • siupd02.zip
    • guupd02.zip
    • zupd02.zip
    • upd02.zip
    • Jol03.zip

  9. Attempts to copy itself to all folders containing the string SHAR, then creates the following files:
    • 1.exe
    • 2.exe
    • 3.exe
    • 4.exe
    • 5.scr
    • 6.exe
    • 7.exe
    • 8.exe
    • 9.exe
    • 10.exe
    • Ahead Nero 7.exe
    • Windown Longhorn Beta Leak.exe
    • Opera 8 New!.exe
    • XXX hardcore images.exe
    • WinAmp 6 New!.exe
    • WinAmp 5 Pro Keygen Crack Update.exe
    • Adobe Photoshop 9 full.exe
    • Matrix 3 Revolution English Subtitles.exe ACDSee 9.exe

  10. Attempts to end the following processes:

    • alogserv.exe
    • Avconsol.exe
    • Avsynmgr.exe
    • AVWUPD32.EXE
    • bawindo.exe
    • blackd.exe
    • ccApp.exe
    • ccEvtMgr.exe
    • ccProxy.exe
    • ccPxySvc.exe
    • DefWatch.exe
    • ESCANH95.EXE
    • FrameworkService.exe
    • ICSUPP95.EXE
    • LUCOMS~1.EXE
    • mcagent.exe
    • mcshield.exe
    • mcvsescn.exe
    • mcvsrte.exe
    • mcvsshld.exe
    • navapsvc.exe
    • navapw32.exe
    • nopdb.exe
    • PavFires.exe
    • pavProxy.exe
    • pavsrv50.exe
    • Rtvscan.exe
    • RuLaunch.exe
    • SAVScan.exe
    • SNDSrvc.exe
    • symlcsvc.exe
    • UpdaterUI.exe
    • Vshwin32.exe
    • VsStat.exe
    • VsTskMgr.exe

  11. Attempt to download a file from the following URLs, and save it in %System%\re_file.exe:

    • [http://]www.cnsrvr.com/[REMOVED]/q.jpg
    • [http://]www.casinofunnights.com/[REMOVED]/q.jpg
    • [http://]www.ec.cox-wacotrib.com/[REMOVED]/q.jpg
    • [http://]www.crazyiron.ru/[REMOVED]/q.jpg
    • [http://]www.uni-esma.de/[REMOVED]/q.jpg
    • [http://]www.sorisem.net/[REMOVED]/q.jpg
    • [http://]www.varc.lv/[REMOVED]/q.jpg
    • [http://]www.belwue.de/[REMOVED]/q.jpg
    • [http://]www.thetildegroup.com/[REMOVED]/q.jpg
    • [http://]www.vybercz.cz/[REMOVED]/q.jpg
    • [http://]www.kyno.cz/[REMOVED]/q.jpg
    • [http://]www.forumgestionvilles.com/[REMOVED]/q.jpg
    • [http://]www.campus-and-more.com/[REMOVED]/q.jpg
    • [http://]www.capitalforex.com/[REMOVED]/q.jpg
    • [http://]www.capitalspreadspromo.com/[REMOVED]/q.jpg
    • [http://]www.prineus.de/[REMOVED]/q.jpg
    • [http://]www.databoots.de/[REMOVED]/q.jpg
    • [http://]www.steintrade.net/[REMOVED]/q.jpg
    • [http://]www.njzt.net/[REMOVED]/q.jpg
    • [http://]www.emarrynet.com/[REMOVED]/q.jpg
    • [http://]www.zebrachina.net/[REMOVED]/q.jpg
    • [http://]www.lxlight.com/[REMOVED]/q.jpg
    • [http://]www.yili-lighting.com/[REMOVED]/q.jpg
    • [http://]www.fachman.com/[REMOVED]/q.jpg
    • [http://]www.q-serwer.net/[REMOVED]/q.jpg
    • [http://]www.wellness-i.com/[REMOVED]/q.jpg
    • [http://]www.newportsystemsusa.com/[REMOVED]/q.jpg
    • [http://]www.westcoastcadd.com/[REMOVED]/q.jpg
    • [http://]www.wing49.cz/[REMOVED]/q.jpg
    • [http://]www.posteffects.com/[REMOVED]/q.jpg
    • [http://]www.provax.sk/[REMOVED]/q.jpg
    • [http://]www.casinobrillen.de/[REMOVED]/q.jpg
    • [http://]www.duodaydream.nl/[REMOVED]/q.jpg
    • [http://]www.finlaw.ru/[REMOVED]/q.jpg
    • [http://]www.fitdina.com/[REMOVED]/q.jpg
    • [http://]www.flashcardplayer.com/[REMOVED]/q.jpg
    • [http://]www.flox-avant.ru/[REMOVED]/q.jpg
    • [http://]www.lotslink.com/[REMOVED]/q.jpg
    • [http://]www.algor.com/[REMOVED]/q.jpg
    • [http://]www.gaspekas.com/[REMOVED]/q.jpg
    • [http://]www.ezybidz.com/[REMOVED]/q.jpg
    • [http://]www.genesisfinancialonline.com/[REMOVED]/q.jpg
    • [http://]www.georg-kuenzle.ch/[REMOVED]/q.jpg
    • [http://]www.girardelli.com/[REMOVED]/q.jpg
    • [http://]www.rodoslovia.ru/[REMOVED]/q.jpg
    • [http://]www.golden-gross.ru/[REMOVED]/q.jpg
    • [http://]www.gregoryolson.com/[REMOVED]/q.jpg
    • [http://]www.gtechna.com/[REMOVED]/q.jpg
    • [http://]www.lunardi.com/[REMOVED]/q.jpg
    • [http://]www.sgmisburg.de/[REMOVED]/q.jpg
    • [http://]www.harmony-farms.net/[REMOVED]/q.jpg
    • [http://]www.hftmusic.com/[REMOVED]/q.jpg
    • [http://]www.hiwmreport.com/[REMOVED]/q.jpg
    • [http://]www.horizonimagingllc.com/[REMOVED]/q.jpg
    • [http://]www.hotelbus.de/[REMOVED]/q.jpg
    • [http://]www.howiwinmoney.com/[REMOVED]/q.jpg
    • [http://]www.ietcn.com/[REMOVED]/q.jpg
    • [http://]www.import-world.com/[REMOVED]/q.jpg
    • [http://]www.houstonzoo.org/[REMOVED]/q.jpg
    • [http://]www.interorient.ru/[REMOVED]/q.jpg
    • [http://]www.internalcardreaders.com/[REMOVED]/q.jpg
    • [http://]www.interstrom.ru/[REMOVED]/q.jpg
    • [http://]www.iutoledo.org/[REMOVED]/q.jpg
    • [http://]www.wena.net/[REMOVED]/q.jpg
    • [http://]www.iesgrantarajal.org/[REMOVED]/q.jpg
    • [http://]www.alexandriaradiology.com/[REMOVED]/q.jpg
    • [http://]www.booksbyhunter.com/[REMOVED]/q.jpg
    • [http://]www.wxcsxy.com/[REMOVED]/q.jpg
    • [http://]www.coupdepinceau.com/[REMOVED]/q.jpg
    • [http://]www.erotologist.com/[REMOVED]/q.jpg
    • [http://]www.jackstitt.com/[REMOVED]/q.jpg
    • [http://]www.imspress.com/[REMOVED]/q.jpg
    • [http://]www.digitalefoto.net/[REMOVED]/q.jpg
    • [http://]www.josemarimuro.com/[REMOVED]/q.jpg
    • [http://]www.eversetic.com/[REMOVED]/q.jpg
    • [http://]www.curious.be/[REMOVED]/q.jpg
    • [http://]www.kameo-bijux.ru/[REMOVED]/q.jpg
    • [http://]www.karrad6000.ru/[REMOVED]/q.jpg
    • [http://]www.kaztransformator.kz/[REMOVED]/q.jpg
    • [http://]www.keywordthief.com/[REMOVED]/q.jpg

  12. Prevents access to several Web sites, some of which may be security-related by adding the following lines to the hosts file: ad.doubleclick.net ad.fastclick.net ads.fastclick.net ar.atwola.com atdmt.com avp.ch avp.com avp.ru awaps.net banner.fastclick.net banners.fastclick.net ca.com click.atdmt.com clicks.atdmt.com dispatch.mcafee.com download.mcafee.com download.microsoft.com downloads.microsoft.com engine.awaps.net fastclick.net f-secure.com ftp.f-secure.com ftp.sophos.com go.microsoft.com liveupdate.symantec.com mast.mcafee.com mcafee.com media.fastclick.net msdn.microsoft.com my-etrust.com nai.com networkassociates.com office.microsoft.com phx.corporate-ir.net secure.nai.com securityresponse.symantec.com service1.symantec.com sophos.com spd.atdmt.com support.microsoft.com symantec.com update.symantec.com updates.symantec.com us.mcafee.com vil.nai.com viruslist.ru windowsupdate.microsoft.com www.avp.ch www.avp.com www.avp.ru www.awaps.net www.ca.com www.fastclick.net www.f-secure.com www.kaspersky.ru www.mcafee.com www.my-etrust.com www.nai.com www.networkassociates.com www.sophos.com www.symantec.com www.trendmicro.com www.viruslist.ru www3.ca.com


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: Heather Shannon

Discovered: February 02, 2006
Updated: February 13, 2007 12:51:01 PM
Also Known As: Bloodhound.Beagle, WORM_BAGLE.CL [Trend Micro]
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. Remove all the entries that the risk added to the hosts file.
  3. Update the virus definitions.
  4. Run a full system scan and delete all the files detected.
  5. Delete any values added to the registry.
  6. 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:
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 remove all the entries that the risk added to the hosts file
  1. Navigate to the following location:

    • Windows 95/98/Me:
    • Windows NT/2000/XP:

    • The location of the hosts file may vary and some computers may not have this file. There may also be multiple copies of this file in different locations. If the file is not located in these folders, search your disk drives for the hosts file, and then complete the following steps for each instance found.
    • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows (Windows 95/98/Me/XP) or C:\Winnt (Windows NT/2000).

  2. Double-click the hosts file.
  3. If necessary, deselect the "Always use this program to open this program" check box.
  4. Scroll through the list of programs and double-click Notepad.
  5. When the file opens, delete all the entries added by the risk. (See the Technical Details section for a complete list of entries.)
  6. Close Notepad and save your changes when prompted.
3. 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.

4. To scan for and delete 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, click Delete.

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.

5. 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:

    "sysformat" = "%System%\sysformat.exe"

  6. Navigate to the subkey:


  7. In the right pane, delete the value:

    "Start" = "4"

  8. Navigate to the subkey:


  9. In the right pane, delete the values:

    "FirstRun" = "1"
    "Riga" = "[RANDOM VALUE]"

  10. Exit the Registry Editor.

6. 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: Heather Shannon