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Discovered: December 08, 2003
Updated: February 13, 2007 12:14:31 PM
Type: Worm
Systems Affected: Windows

W32.HLLW.Bodiru is a worm that spreads using file-sharing networks. It attempts to perform a Denial of Service (DoS) attack against two particular Internet hosts. The worm is written in Visual Basic and is compressed with ASPack.

W32.HLLW.Bodiru attempts to copy itself into a number of folders under the following names:

    • ACDSee 5.5.exe
    • Adobe_Keyge.exe
    • Age of Empires 2 crack.exe
    • Aim bot ut3.exe
    • All Microsoft Products CD Key Generator.exe
    • All Norton Antivirus KEys!.exe
    • Ana Kournikova Sex Video (downloader).exe
    • Animated Screen 7.exe
    • Any Nick Name Msn 6.0.exe
    • AOL Instant Messenger Crasher.exe
    • aol password cracker.exe
    • Aol_cracker.exe
    • AquaNox2 Crack.exe
    • Audiograbber 2.05.exe
    • AVP Antivirus Pro Key Crack.exe
    • BabeFest 2003 ScreenSaver 1.6.exe
    • Battlefield1942_bloodpatch.exe
    • Battlefield1942_keygen.exe
    • Britney Spears Sex Video.exe
    • Buffy Vampire Slayer Movie.exe
    • BurnDvds.exe
    • Business Card Designer Plus 7.9.exe
    • cable modem ultility pack.exe
    • cable modem.exe
    • Clone CD (crack).exe
    • Clone CD
    • Cool Edit Pro v2.55.exe
    • Counter Strike - See Through Walls.exe
    • counter-strike.exe
    • Crack Passwords Mail.exe
    • Credit Card Numbers generator(incl Visa,MasterCard).exe
    • Credit_Card_Numbers_generator.exe
    • Darkness_Krew.exe
    • DeadAim 4.0 KeyGen.exe
    • Diablo 3 Crack.exe
    • Diablo_2_Crack.exe
    • DirectDVD 5.0.exe
    • DirectX Buster (all versions).exe
    • DivX Video Bundle 6.5.exe
    • Divx_pro (FINAL!).exe
    • Divx_Pro_5.1_Serial.exe
    • Doom III (Cd KEys).exe
    • Download Accelerator Plus 6.1.exe
    • DVD Copy Plus v5.0.exe
    • DVD Region-Free 2.3.exe
    • Dvd_Plus_Crack.exe
    • Dvd_Ripper(The Best 04).exe
    • Dvd_To_Vcd.exe
    • Easy_Dvd_creator_Crack.exe
    • Easy_Dvd_Ripper.exe
    • Edonkey2000-Speed me up scotty.exe
    • Fifa 2004 (Cd Crack).exe
    • FIFA2003 crack.exe
    • Final Fantasy VII XP Patch 1.5.exe
    • Flash MX crack (trial).exe
    • FlashGet 1.5.exe
    • FreeRAM XP Pro 1.9.exe
    • Game Cube Real Emulator.exe
    • GetRight 5.0a.exe
    • Gothic2 licence.exe
    • GTA 3 Crack.exe
    • GTA 3 Serial.exe
    • Guitar Chords Library 5.5.exe
    • Hack Any Kazaa User.exe
    • Hack The School.exe
    • Hack Website Easy.exe
    • Hacker_The_LoveStory.exe
    • Half Life 2 (Cd Crack).exe
    • Half Life 2 (cd Keys).exe
    • Harry potter2 Crack.exe
    • Hitman_2_no_cd_crack.exe
    • Hotmail Hacker Gold (All Msn Versions!).exe
    • Hotmail_Hacker_2003-Xss_Exploit.exe
    • Ip Nuker V6 (Reall Works).exe
    • KaZaA Hack 2.5.0.exe
    • Kazaa Lite )FINALL!(.exe
    • Kazaa SDK + Xbit speedUp for 2.xx.exe
    • KaZaA Speedup 3.6.exe
    • KaZaA-Hack_2.5.0.exe
    • Links 2003 Golf game (crack).exe
    • Living Waterfalls 1.3.exe
    • Love.exe
    • LYNDEN.exe
    • Macromedia product keys.exe
    • Macromedia_Keygen.exe
    • Mafia_crack.exe
    • Mail Bomber For msn messsenger 6.0.exe
    • Matrix Screensaver 1.5.exe
    • Mcafee Antivirus Scan Crack.exe
    • MediaPlayer Update.exe
    • Messenger Plus Latest!.exe
    • Microsoft .NET hack.exe
    • Microsoft KeyGenerator-Allmost all microsoft stuff.exe
    • mIRC 6.40.exe
    • Msn 6.0 (Multi Messenger).exe
    • Msn 6.0 Crasher!.exe
    • Msn 6.0 Kicker.exe
    • Msn 6.0 Password Cracker.exe
    • Msn Emotions (Version 6.0).exe
    • Msn Emotions (Version 6.1).exe
    • Msn Ip Finder 2004.exe
    • Msn Messenger 6.0 Bomber!.exe
    • Msn Messenger Betta 6.2.exe
    • MSN Password Hacker 5.7 (worked on my ex-girlfriend!).exe
    • Music Download 2003 (Full Albums).exe
    • MWorld Of Warcraft (FULL) Installer and Downloader.exe
    • NBA2003_crack.exe
    • Need 4 Speed crack.exe
    • Nero_Burning_Rom_Crack.exe
    • Netbios Nuker 2003.exe
    • Netbios Nuker 2004.exe
    • Netfast 1.8.exe
    • Network Cable e ADSL Speed 2.0.5.exe
    • Nimo CodecPack (new) 8.0.exe
    • Nimo_Codec_PackUpdater.exe
    • Norton Anvirus Key Crack.exe
    • PalTalk 5.01b.exe
    • pamela_anderson.exe
    • Panda Antivirus Titanium Crack.exe
    • play station emulator.exe
    • Pop-Up Stopper 3.5.exe
    • Popup Defender 6.5.exe
    • PS2 PlayStation Simulator.exe
    • Ps2 Real Emulator.exe
    • Quake 3 Keygen (works Great).exe
    • Quake3 - See through wallz.exe
    • Quick Time Key Crack.exe
    • QuickTime_Pro_Crack.exe
    • Real Sex Toys!.exe
    • Screen saver christina aguilera naked.exe
    • Security-2003-Update.exe
    • Serials 2003 v.8.0 Full.exe
    • Serials 2004 v.8.0 Full.exe
    • serials2000.exe
    • SmartFTP 2.0.0.exe
    • SmartRipper v2.7.exe
    • Space Invaders 1978.exe
    • Splinter_Cell_Crack.exe
    • Starcraft serials.exe
    • Stripping MP3 dancer+crack.exe
    • Sub 7 2.9.exe
    • Trillian 0.85 (free).exe
    • TweakAll 3.8.exe
    • Unreal Tournament 2003 (Cd Crack).exe
    • Unreal Tournament 2003 (Cd KEys).exe
    • Unreal2_bloodpatch.exe
    • Unreal2_crack.exe
    • UT2003_bloodpatch.exe
    • UT2003_keygen.exe
    • UT2003_no cd (crack).exe
    • UT2003_patch.exe
    • VB6.exe
    • Visual Basic (ALL KEYS GEN).exe
    • Visual Basic 6.0 Msdn Plugin.exe
    • Visual Basic Decompiler.exe
    • warcraft 3 crack (Really Works).exe
    • warcraft 3 serials.exe
    • WarCraft_3_crack.exe
    • winamp plugin pack.exe
    • WindowBlinds_4.0.exe
    • Windows XP complete + serial.exe
    • Windows Xp Exploit.exe
    • WinOnCD 4 PE_crack.exe
    • WinRar 3.xx Password Cracker.exe
    • WinZip 9.0b (CRACK).exe
    • WinZip 9.0b.exe
    • winzip full version key generator.exe
    • Winzip KeyGenerator Crack.exe
    • WinZipped Visual C++ Tutorial.exe
    • XNuker 2003 2.93b.exe
    • XNuker_2003_2.93b.exe
    • Xvid_Codec_Installer.exe
    • Yahoo Account Stealer.exe
    • Yahoo Messenger 6.0.exe
    • Zelda Classic 2.00.exe

Antivirus Protection Dates

  • Initial Rapid Release version December 08, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version December 08, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date December 10, 2003

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

Technical Description

When W32.HLLW.Bodiru is executed, it performs the following actions:

  1. Attempts to copy itself as the following files:
    • C:\W32.rudeboi.exe
    • A:\Home Work.doc.pif
    • C:\Norton Anitivirus 2004.exe
    • C:\Rude Boi(Full Screen Saver).scr
    • C:\Windows\System\Windows Tools.exe
    • C:\Windows\System\W32.rudeboi.exe
    • C:\WINNT\System32\Windows Tools.exe
    • C:\WINNT\System32\W32.rudeboi.exe
    • C:\Windows\System32\Darkness_Krew (OWnZ ya).exe
    • C:\Windows\System\Live update.pif
    • C:\WINNT\System32\Windows Update.exe
    • C:\Windows\System32\Windows Update.pif
    • C:\Win98\Start menu\Programs\Startup\Windows Update.exe
    • C:\Win95\Start menu\Programs\Startup\Config.pif
    • C:\WinMe\Start menu\Programs\Startup\System.scr
    • C:\Windows\Start menu\Programs\Startup\Help.exe
    • C:\Documents and Settings\All Users\Start menu\Programs\Startup\Windows Update.exe
    • C:\Documents and Settings\Administrator\Start menu\Programs\Startup\Config.pif
    • C:\Documents and Settings\Default User\Start menu\Programs\Startup\Windows Update.exe
    • C:\WINNT\Profiles\All Users\Start menu\Programs\Startup\windows Update.exe
    • C:\WINNT\Profiles\Administrator\Start menu\Programs\Startup\windows Update.exe

      In each case, the attempt will fail if the folder does not exist.

  2. Attempts to make several hundred copies of itself in the following folders:
    • C:\Program Files\eMule\Incoming\

      Refer to the "Additional information" section for the file names under which the worm copies itself into these folders. In each case, the attempt will fail if the folder does not exist.

    • C:\Program Files\Kazaa\My shared folder
    • C:\Program Files\Kazaa Lite K++\My shared folder
    • C:\Program Files\eDonkey2000\Incoming\

  3. Creates the following files:
    • <original folder>\W32.DARKNESS_KREW.exe
    • <original folder>\1nfected.exe
    • \Darkness_Krew

      These three files are identical. They are severely damaged versions of the worm and do not pose a threat. However, Symantec antivirus products detect them.

    • \[Darkness_Krew].txt (a harmless text file which is not detected by Symantec antivirus products)
    • C:\Administrator (a harmless text file which is not detected by Symantec antivirus products).

  4. Attempts to prepend the first 28,672 bytes of the worm code to the following files, and thus, corrupts them:
    • C:\Program Files\Winzip\WINZIP32.exe
    • C:\Program Files\Norton AntiVirus\Navw32.exe
    • C:\Program Files\MSN Messenger\Msnmsgr.exe
    • C:\Windows\Wscript.exe
    • C:\Windows\Rundll.exe
    • C:\Windows\Rundll32.exe
    • C:\Winnt\Regedit.exe
    • C:\Windows\System\Underwater.scr
    • C:\Windows\Regedit.exe
    • C:\Winnt\Regedit.exe
    • C:\Winnt\System32/Regedit.exe (this file cannot exist because the filename is illegal)

      If any file in this list does not exist but the folder does (for example, the file C:\Windows\System\Underwater.scr does not exist but the folder C:\Windows\System does), then the worm will create the file with a length of zero bytes before prepending the contents of W32.DARKNESS_KREW.exe to the file.

  5. Uses the ping program to send ICMP Echo Request packets (of size 65,500 bytes) to the hosts symantec.com and mess.be in an attempted DoS attack. The worm starts four instances of the ping program (two for each host pinged), and each instance sends ICMP Echo Request packets at a rate of one per second.

  6. Attempts to end the following processes:
    • _AVP.EXE
    • _AVP32.EXE
    • _AVPM.EXE
    • AVE32.EXE
    • AVNT.EXE
    • AVP.EXE
    • AVP32.EXE
    • AVPDOS32.EXE
    • AVPM.EXE
    • AVPTC32.EXE
    • AVWIN95.EXE
    • AVWUPD32.EXE
    • CFINET32.EXE
    • CLAW95.EXE
    • CLAW95CF.EXE
    • CLAW95CT.EXE
    • DV95.EXE
    • DV95_O.EXE
    • DVP95.EXE
    • DVP95_0.EXE
    • TerminateEXE
    • EFINET32.EXE
    • F-AGNT95.EXE
    • F-PROT.EXE
    • FPROT95.EXE
    • F-PROT95.EXE
    • FP-WIN.EXE
    • FRW.EXE
    • ICLOAD95.EXE
    • ICSUPP95.EXE
    • IOMON98.EXE
    • JED.EXE
    • JEDI.EXE
    • KPF.EXE
    • KPFW32.EXE
    • LOCKDOWN2000.EXE
    • mcafee.exe
    • N32SCAN.EXE
    • N32SCANW.EXE
    • navapsvc.exe
    • NAVAPW32.EXE
    • NAVLU32.EXE
    • NAVW.EXE
    • NAVW32.EXE
    • NVC95.EXE
    • PAVW.EXE
    • PCCWIN98.EXE
    • RAV7.EXE
    • SCAN32.EXE
    • SCAN95.EXE
    • SERV95.EXE
    • SMC.EXE
    • SWEEP95.EXE
    • TCA.EXE
    • TDS2-98.EXE
    • TDS2-NT.EXE
    • VET32.EXE
    • VET95.EXE
    • VET98.EXE
    • VSCAN40.EXE
    • VSHWIN32.EXE
    • vsmon.exe
    • VSSCAN40.EXE
    • WFINDV32.EXE
    • zaplus.exe
    • zonealarm.EXE

  7. Adds the value:

    "App.EXEName"="<folder containing the worm>\.exe"

    to the registry key:


    The author's intention appears to be to have the worm start when Windows starts, but this entry in the registry has no effect.

  8. Ends the processes that have the following strings in the title bar:
    • MS-DOS Prompt
    • Norton Antivirus
    • Registry Editor
    • Windows Task Manager
    • System Configuration Utility


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.

Note: You may be unable to scan files if the file Navw32.exe has been corrupted. If this has occurred, you will see a program error when you try to scan. In this case, you will have to re-install the program.

  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.Bodiru.
  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:
Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, re-enable 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. 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.Bodiru, 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 value:

    "App.EXEName"="<directory containing worm>\.exe"

  5. Exit the Registry Editor.

Writeup By: Fergal Ladley