W32.Xabot.Worm

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Discovered: November 09, 2003
Updated: February 13, 2007 12:13:35 PM
Type: Worm
Systems Affected: Windows


W32.Xabot.Worm is a worm that attempts to spread itself through the IRC and file-sharing networks. It also has backdoor Trojan Horse capabilities, which allows a hacker to gain control of a compromised computer. The existence of the file wininit32.exe is an indication of a possible infection.

Antivirus Protection Dates

  • Initial Rapid Release version November 10, 2003
  • Latest Rapid Release version June 09, 2018 revision 021
  • Initial Daily Certified version November 10, 2003
  • Latest Daily Certified version June 10, 2018 revision 002
  • Initial Weekly Certified release date November 12, 2003

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

Writeup By: Robert X Wang

Discovered: November 09, 2003
Updated: February 13, 2007 12:13:35 PM
Type: Worm
Systems Affected: Windows


When W32.Xabot.Worm is executed, it does the following:

  1. Copies itself as %System%\wininit32.exe.


    Note: %System% is a variable. The worm locates the System folder and copies itself to that location. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

  2. Copies itself to the following folders:
    • The first shared folder in KaZaA
    • The My Shared Folder in Morpheus
    • The DownloadsLocation folder in iMesh
    • \Program Files\eDonkey2000\incoming
    • \Program Files\LimWire\Shared
    • the My Music folder

      as the following files:
    • Doom 3 NO CD Crack.exe
    • Half-Life 2 Keygen.exe
    • Half-Life 2 NO CD Crack.exe
    • Jedi Academy NO CD Crack.exe
    • Max Payne 2 NO CD Crack.exe
    • Medal Of Honor - Pacific Assault NO CD Crack.exe

  3. Adds the values:
    • "AllOrNone"="1"
    • "IncludeKernelFaults"="1"
    • "IncludeMicrosoftApps"="1"
    • "IncludeWIndowsApps"="1"
    • "ShowUI"="0"
    • "DoReport"="0"

      to the registry key:

      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PCHealth\ErrorReporing

  4. Adds the value:

    "SysInit"="wininit32.exe"

    to the registry keys:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunOnce
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunServices
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunOnce
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  5. Adds the value:

    "StubPath"="wininit32.exe"

    to the registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Active Setup\Installed Components\SysInit

  6. Adds the value:

    "LastMonth"="%MonthOfTheYear%"

    to the registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Connect


    Note: %MonthOfTheYear% is a variable. It represents the current month, taken from the system date.

  7. Adds the value:

    "DisableRegistryTools"="1"

    to the registry key:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
    Policies\System

  8. Adds the value:

    "DisallowRun"="1"

    to the registry key:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
    Policies\Explorer

  9. Adds the values:
    • "1"="lockdown.exe"
    • "2"="vsmain.exe"
    • "3"="msconfig.exe"
    • "4"="zonealarm.exe"
    • "5"="zapro.exe"
    • "6"="blackd.exe"
    • "7"="blackice.exe"
    • "8"="processmonitor.exe"
    • "9"="pmon.exe"
    • "10"="smc.exe"
    • "11"="generics.exe"
    • "12"="netstat.exe"
    • "13"="ethereal.exe"
    • "14"="sniffem.exe"
    • "15"="monitor.exe"
    • "16"="lockdown2000.exe"
    • "17"="webtrap.exe"
    • "18"="programauditor.exe"
    • "19"="sniffem.exe"
    • "20"="jammer.exe"
    • "21"="ldnetmon.exe"
    • "22"="safeweb.exe"
    • "23"="realmon.exe"
    • "24"="guw32.exe"
    • "25"="regmon.exe"
    • "26"="netmon.exe"
    • "27"="portmon.exe"
    • "28"="filemon.exe"
    • "29"="scan32.exe"

      to the registry key:

      HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
      Policies\Explorer\DisallowRun

  10. Adds the registry keys:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run-
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunServices-
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run-

  11. Deletes the following values:
    • "Configuration Loader"
    • "Update"
    • "WinUpdate"
    • "Task Manager"
    • "Windows API Structure"
    • "Microsoft Diagnostic"
    • "3Dfx Acc"
    • "ABsr"
    • "adp"
    • "Advapi"
    • "AIM reminder"
    • "Alevir"
    • "Alogserv"
    • "Amon"
    • "AnVir"
    • "Apvxd"
    • "Apvxdwin"
    • "ausvc"
    • "Avast32"
    • "AvconsoleEXE"
    • "Avgserv9.exe"
    • "AvMaiSrv"
    • "avpcc"
    • "avx communicator"
    • "avxlni"
    • "awhost32"
    • "Backwork"
    • "bargains"
    • "bitdefenderlive"
    • "BlackIce Utility"
    • "BMail Installation"
    • "Bnexe"
    • "BOCleanautostart"
    • "Configuration Manager"
    • "dlder"
    • "Vet Alert"
    • "ExplorerTask"
    • "Bonzi Buddy"
    • "boot"
    • "Bymer.Scanner"
    • "cAgOu"
    • "CC2KUI"
    • "Choke"
    • "CLICKTHEBUTTON"
    • "CmeSYS"
    • "CmeUPD"
    • "msnb"
    • "Configuration Wizard"
    • "CoreSrv"
    • "CyDoor"
    • "Debug"
    • "distributed.net client"
    • "LangSupportEx"
    • "DownloadWare"
    • "Dvp95"
    • "Eac_Cnry"
    • "eixfi"
    • "Element"
    • "Explorer32"
    • "F-StopW"
    • "Gator"
    • "Vet Start UpHookSys"
    • "I386"
    • "Kernell32"
    • "Kernel32"
    • "LoadBlackD"
    • "LoadDBackUp"
    • "LoadFonts"
    • "LoadOrderVerification"
    • "LTM2"
    • "McAfee Firewall"
    • "McAfeeVirusScanService"
    • "mnsvc"
    • "MPFExe"
    • "MprHTML"
    • "MSAdmin"
    • "WinUpdatermsdos423"
    • "MSKernel32"
    • "msn"
    • "Msrc"
    • "MSREGIT"
    • "Ms Spool32"
    • "Mswincfg"
    • "murphy shield"
    • "Default"
    • "MxHLp32"
    • "Myapp"
    • "NAV Agent"
    • "navapw32"
    • "NAV Configuration Wizard"
    • "NAV DefAlert"
    • "Netapi"
    • "Nod32CC"
    • "Norton Auto-Protect"
    • "ogrc"
    • "PAV.EXE"
    • "PCStart"
    • "PersFw"
    • "PPMemCheck"
    • "procmon"
    • "RapApp"
    • "TaskMan"
    • "rvds"
    • "rdvs"
    • "Registry"
    • "Run_cd"
    • "Rundllsystem32"
    • "RunProg"
    • "ScanInicio"
    • "ScrSvr"
    • "VAGuard"
    • "server"
    • "serverex"
    • "Shellapi32"
    • "sistrai.exe"
    • "sistray"
    • "SyncAgent"
    • "SysProtect"
    • "SysScan"
    • "Explorer"
    • "SystemBoot"
    • "SystemFTP"
    • "SystemMD"
    • "System Monitor"
    • "SystemReg"
    • "System-Service"
    • "Task Bar"
    • "TaskReg"
    • "Taskschd"
    • "Tau monitor"
    • "tcactive"
    • "tcmonitor"
    • "Tiny Personal Firewall"
    • "TrojanScanner"
    • "UMXLDRW"
    • "vscanner"
    • "Vshwin32EXE"
    • "VsStatEXE"
    • "WebScan"
    • "WebScanX"
    • "Webtrap"
    • "Whvlxd"
    • "Win32BaseServiceMOD"
    • "Win32DLL"
    • "Win32 Rundll Loader"
    • "Win386"
    • "Winahlp.exe"
    • "WIN-BUGSFIX"
    • "Windows"
    • "WinDSNX"
    • "WinLoader"
    • "WinProfile"
    • "WinProxy"
    • "Win Server"
    • "winserver"
    • "Win Server Updt"
    • "Winsvc32"
    • "Winsys"
    • "WinSystem"
    • "WQK"
    • "Zonavirus"
    • "ZoneAlarm"
    • "ZoneAlarm Pro"
    • "vsmon"
    • "vsmon.exe"
    • "zzgshp"
    • "WinHelp"
    • "WinGate initialize"
    • "Program In Windows"
    • "Remote Procedure Call Locator"
    • "WinDSNX"
    • "Windows Subsys"
    • "msconfigurator"
    • "ps2"
    • "cmd"
    • "Supernova"
    • "WindowsMGM"
    • "NeroCheck"
    • "LoadWinConf"
    • "messnger"
    • "explore"
    • "FuckCop"
    • "InternetConfigure"
    • "Api"
    • "Svhost Loader"
    • "Gforce4DRv"
    • "Ccapp"
    • "Ccevtmgr"
    • "Ccpxysvc"
    • "Ccregvfy"
    • "Cd_load"
    • "Cmesys"
    • "Cmgrdian"
    • "Comsocks"
    • "Cpdclnt"
    • "Cpd"
    • "Absr"
    • "Adservice"
    • "Aornum"
    • "Arupld32"
    • "Atrack"
    • "wins"
    • "fSys"
    • "rundll"
    • "rundll32"
    • "Network Connections"
    • "NTFix"
    • "System Service"
    • "windows update"
    • "WinConfig"
    • "print sharing"
    • "WindowsUpdate"
    • "Loader"
    • "GForce4DR"
    • "Microsoft System Monitor"
    • "Windows Registry Checker"
    • "WindowsFix32"
    • "winupd32.exe"
    • "CriticalUpdate"
    • "Wininit"
    • "LoadWinConf"
    • "vhostl"
    • "Svhost Loader"
    • "GForce4DRv"
    • "ssdpsrv.exe"
    • "ssdpsvr.exe"
    • "System Service"
    • "WindowsUpdate"
    • "Internat32.exe"
    • "Winsock2 driverSysCmd"
    • "NTsocket"
    • "updatek"
    • "webiss"
    • "explorer"
    • "systemtray"
    • "systemtray32"
    • "SystemTray32"
    • "systray"
    • "SysTray"
    • "SysTray32"
    • "GhostStartTrayApp"
    • "SymTray - Norton SystemWorks"
    • "fuckyou"
    • "WinFix32.exe"
    • "vptray"
    • "SystemUpdate"
    • "Microsoft Configuration"
    • "WinApp32"
    • "SVHOST"
    • "PrinTray"
    • "tskdbg"
    • "CMESys"
    • "CMD"
    • "WINTASK"
    • "TaskMonitor"
    • "winapidr"
    • "Com+Services"
    • "System Configuration"
    • "WIN32 DEBUG"
    • "poeto."
    • "NAV Live Update"
    • "Windows Explorer"
    • "config32.exe"
    • "Pop3trap.exe"
    • "WebTrapNT.exe"
    • "TrackPointSrv"
    • "Microsoft Netview"
    • "Generic Host Process for Win32 Services"...
    • "AdobeA"
    • "win32app"
    • "Explorer de la dc"
    • "ColdLife - icmp"
    • "ColdLife ?icmp"
    • "NT Guard"
    • "Sustem"
    • "updateWin"
    • "Winsock32 driver"
    • "windows auto update"

      from the registry keys:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunOnce
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunServices
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunOnce
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  12. Attempts to delete the following files from %System% folder:
    • syscfg32.exe
    • cnfgldr.exe
    • sysmon16.exe
    • tskmgr32.exe
    • winsys.exe
    • tskman.exe
    • taskmrg.exe
    • win.exe
    • syslog.exe
    • msgsrv.exe
    • msnb.exe
    • TCPSVS32.EXE
    • NAV32_LOADER.EXE
    • winservices.exe
    • RAVMOND.exe
    • WinHelp.exe
    • IEXPLORE.EXE

  13. Attempts to delete the following files from %Windir% folder:
    • temp\\r.bat
    • Hello-Kitty.exe
    • BigMac.exe
    • WINMGM32.EXE
    • SNTMLS.DAT
    • DWN.DAT
    • SNTMLS.DAT
    • fonts\\explorer.exe
    • fonts\\rundll32.exelitmus\\winup.exe
    • litmus\\MSGSRV320.exe
    • litmus\\MSGORV32.exe
    • litmus\\msgsrv32.exe
    • litmus\\killer.exe
    • DIRECX.DLL
    • mirc.exe
    • mirc32.exe
    • temp.exe
    • temp2.exe
    • explore.exe
    • psexec.exe
    • rconnect.exe
    • whvlxd.exe
    • iiscache.dll
    • vbrun7.dll
    • mirc.ini
    • mirc2.ini
    • mirc3.ini
    • script.ini
    • auth.ini
    • settings.ini
    • pr.ini
    • whvlxd.dat
    • fdrive.dat
    • gates.txt
    • temp.scr
    • Winnt32.nfo
    • remote.ini


      Note: %Windir% is a variable. The worm locates the Windows folder and attempts to delete several files from that location. By default, this is C:\Windows (Windows 95/98/Me/XP), C:\Winnt (Windows NT/2000).

  14. Uses its own Internet Relay Chat (IRC) client to connect to an IRC channel and waits for commands from a hacker.


Recommendations

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: Robert X Wang

Discovered: November 09, 2003
Updated: February 13, 2007 12:13:35 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. Reverse the changes that the worm made to the registry and restart the computer.
  3. Update the virus definitions.
  4. Run a full system scan and delete all the files detected as W32.Xabot.Worm.
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. Reversing the changes made to the registry; restarting the computer

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 following keys:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunOnce
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunServices
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
      RunOnce

  4. In the right pane, delete the value:

    "SysInit"="wininit32.exe"

  5. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PCHealth\ErrorReporing

  6. In the right pane, delete the values:
    • "AllOrNone"="1"
    • "IncludeKernelFaults"="1"
    • "IncludeMicrosoftApps"="1"
    • "IncludeWIndowsApps"="1"
    • "ShowUI"="0"
    • "DoReport"="0"

  7. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Active Setup\Installed Components\SysInit

  8. In the right pane, delete the value:

    "StubPath"="wininit32.exe"

  9. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Connect

  10. In the right pane, delete the value:

    "LastMonth"="%MonthOfTheYear%"

  11. Navigate to the key:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
    Policies\System

  12. In the right pane, delete the value:

    "DisableRegistryTools"="1"

  13. Navigate to the key:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
    Policies\Explorer

  14. In the right pane, delete the value:

    "DisallowRun"="1"

  15. Navigate to the key:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
    Policies\Explorer\DisallowRun

  16. In the right pane, delete the values:
    • "1"="lockdown.exe"
    • "2"="vsmain.exe"
    • "3"="msconfig.exe"
    • "4"="zonealarm.exe"
    • "5"="zapro.exe"
    • "6"="blackd.exe"
    • "7"="blackice.exe"
    • "8"="processmonitor.exe"
    • "9"="pmon.exe"
    • "10"="smc.exe"
    • "11"="generics.exe"
    • "12"="netstat.exe"
    • "13"="ethereal.exe"
    • "14"="sniffem.exe"
    • "15"="monitor.exe"
    • "16"="lockdown2000.exe"
    • "17"="webtrap.exe"
    • "18"="programauditor.exe"
    • "19"="sniffem.exe"
    • "20"="jammer.exe"
    • "21"="ldnetmon.exe"
    • "22"="safeweb.exe"
    • "23"="realmon.exe"
    • "24"="guw32.exe"
    • "25"="regmon.exe"
    • "26"="netmon.exe"
    • "27"="portmon.exe"
    • "28"="filemon.exe"
    • "29"="scan32.exe"

  17. Exit the Registry Editor.

  18. Restart the computer.

3. 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.

4. 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.Xabot.Worm, click Delete.


Writeup By: Robert X Wang