1. /
  2. Security Response/
  3. W32.Mytob.EC@mm

W32.Mytob.EC@mm

Risk Level 2: Low

Discovered:
June 10, 2005
Updated:
February 13, 2007 12:40:07 PM
Also Known As:
Win32.Mytob.EN [Computer Assoc, Net-Worm.Win32.Mytob.bi [Kaspe, W32/Mytob.cg@MM [McAfee], W32/Mytob-AT [Sophos], WORM_MYTOB.EH [Trend Micro]
Type:
Worm
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

When W32.Mytob.EC@mm is executed, it performs the following actions:
  1. Copies itself as %System%\External.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. Creates the mutex "H-E-L-L-B-O-T-P-O-L-Y-M-O-R-P-H" so that only one copy of the worm runs on the compromised computer.

  3. Adds the value:

    "External Dependencies" = "External.exe"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
    RunServices


    so that the risk runs every time Windows starts.

  4. Adds the value:

    "Start" = "4"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess

    which disables the Shared Access service in Windows 2000/XP.

    Note: The worm recreates these registry subkeys if they are deleted.

  5. Gathers email addresses from the Windows Address Book and from the following locations:

    • %Windir%\Temporary Internet Files
    • %Userprofile%\Local Settings\Temporary Internet Files
    • %System%

      Notes:
    • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.
    • %UserProfile% is a variable that refers to the current user's profile folder. By default, this is C:\Documents and Settings\[Current User] (Windows NT/2000/XP).
    • %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).

  6. Gathers email addresses from files with the following extensions on all local drives from C to Y:

    • .txt
    • .htm
    • .sht
    • .jsp
    • .cgi
    • .xml
    • .php
    • .asp
    • .dbx
    • .tbb
    • .adb
    • .html
    • .wab

      Avoids sending a copy of itself to email addresses that contain any of the following strings:

    • root
    • info
    • samples
    • postmaster
    • webmaster
    • noone
    • nobody
    • nothing
    • anyone
    • someone
    • your
    • you
    • bugs
    • rating
    • site
    • contact
    • soft
    • somebody
    • privacy
    • service
    • help
    • not
    • submit
    • feste
    • gold-certs
    • the.bat
    • page
    • admin
    • icrosoft
    • support
    • ntivi
    • unix
    • bsd
    • linux
    • listserv
    • certific
    • google
    • accoun
    • spm
    • spam
    • www
    • secur
    • abuse

      Avoids sending a copy of itself to email addresses that contain any of the following strings in the domain name:

    • avp
    • syma
    • icrosof
    • msn.
    • hotmail
    • panda
    • sopho
    • borlan
    • inpris
    • example
    • mydomai
    • nodomai
    • ruslis
    • .gov
    • gov.
    • .mil
    • foo.
    • berkeley
    • unix
    • math
    • bsd
    • mit.e
    • gnu
    • fsf.
    • ibm.com
    • google
    • kernel
    • linux
    • fido
    • usenet
    • iana
    • ietf
    • rfc-ed
    • sendmail
    • arin.
    • ripe.
    • isi.e
    • isc.o
    • secur
    • acketst
    • pgp
    • tanford.e
    • utgers.ed
    • mozilla

  7. Appends the following prefixes to domain names in an attempt to find Simple Mail Transfer Protocol (SMTP) servers:

    • mx
    • mail.
    • smtp.
    • mx1.
    • mxs.
    • mail1.
    • relay.
    • ns.
    • gate.

  8. Uses its own SMTP engine to send itself to the email addresses that it finds. The email has the following characteristics:

    From:
    One of the following:

    • support
    • administrator
    • mail
    • service
    • admin
    • info
    • register
    • webmaster

      Note: The worm may also spoof a From address from one of the addresses found on the compromised computer.

      Subject:
      One of the following:

    • Your Account is Suspended
    • *DETECTED* Online Rser Violation
    • Your Account is Suspended For Security Reasons
    • Warning Message: Your services near to be closed.
    • Important NotificationMembers Support
    • Security measures
    • Email Account Suspension
    • Notice of account limitation

      Message:
      One of the following:

    • Dear user [username part of email],
      You have successfully updated the password of your [domain part of email] account.
      If you did not authorize this change or if you need assistance with your account, please contact [domain part of email] customer service at: [spoofed email with same domain]
      Thank you for using [domain part of email]!
      The [domain part of email] Support Team

      +++ Attachment: No Virus (Clean)
      +++ [domain part of email] Antivirus - www.[domain part of email]

    • Dear user [username part of email],
      It has come to our attention that your [domain part of email] User Profile ( x ) records are out of date. For further details see the attached document.
      Thank you for using [domain part of email]!
      The [domain part of email] Support Team

      +++ Attachment: No Virus (Clean)
      +++ [domain part of email] Antivirus - www.[domain part of email]

    • Dear [domain part of email] Member,
      We have temporarily suspended your email account [email].
      This might be due to either of the following reasons:
      1. A recent change in your personal information (i.e. change of address).
      2. Submiting invalid information during the initial sign up process.
      3. An innability to accurately verify your selected option of subscription due to an internal error within our processors.
      See the details to reactivate your [domain part of email] account.
      Sincerely,The [domain part of email] Support Team

      +++ Attachment: No Virus (Clean)
      +++ [domain part of email] Antivirus - www.[domain part of email]

    • Dear [domain part of email] Member,
      Your e-mail account was used to send a huge amount of unsolicited spam messages during the recent week. If you could please take 5-10 minutes out of
      your online experience and confirm the attached document so you will not run into any future problems with the online service.
      If you choose to ignore our request, you leave us no choice but to cancel your membership.
      Virtually yours,
      The [domain part of email] Support Team

      +++ Attachment: No Virus found
      +++ [domain part of email] Antivirus - www.[domain part of email]


      Attachment:
      One of the following:

    • updated-password
    • email-password
    • new-password
    • password
    • approved-password
    • account-password
    • accepted-password
    • important-details
    • account-details
    • email-details
    • account-info
    • document
    • readme
    • account-report

      with one of the following extensions:

    • .pif
    • .scr
    • .exe
    • .cmd
    • .bat

      Note: The attachment may also be a .zip file containing a copy of the worm with two file extensions. The copy of the worm will have .doc, .htm, or .txt as the first extension, and .exe, .pif, or .scr as the second extension.

  9. Opens a back door by connecting to an IRC channel #pwnz on the 81.169.135.53 domain. The worm listens for commands that allow the remote attacker to perform any of the following actions:

    • Execute files
    • Download files
    • Perform other IRC commands determined by the attacker

  10. Blocks access to several security-related Web sites by appending the following text to the hosts file:

    127.0.0.1 www.symantec.com
    127.0.0.1 securityresponse.symantec.com
    127.0.0.1 symantec.com
    127.0.0.1 www.sophos.com
    127.0.0.1 sophos.com
    127.0.0.1 www.mcafee.com
    127.0.0.1 mcafee.com
    127.0.0.1 liveupdate.symantecliveupdate.com
    127.0.0.1 www.viruslist.com
    127.0.0.1 viruslist.com
    127.0.0.1 viruslist.com
    127.0.0.1 f-secure.com
    127.0.0.1 www.f-secure.com
    127.0.0.1 kaspersky.com
    127.0.0.1 kaspersky-labs.com
    127.0.0.1 www.avp.com
    127.0.0.1 www.kaspersky.com
    127.0.0.1 avp.com
    127.0.0.1 www.networkassociates.com
    127.0.0.1 networkassociates.com
    127.0.0.1 www.ca.com
    127.0.0.1 ca.com
    127.0.0.1 mast.mcafee.com
    127.0.0.1 my-etrust.com
    127.0.0.1 www.my-etrust.com
    127.0.0.1 download.mcafee.com
    127.0.0.1 dispatch.mcafee.com
    127.0.0.1 secure.nai.com
    127.0.0.1 nai.com
    127.0.0.1 www.nai.com
    127.0.0.1 update.symantec.com
    127.0.0.1 updates.symantec.com
    127.0.0.1 us.mcafee.com
    127.0.0.1 liveupdate.symantec.com
    127.0.0.1 customer.symantec.com
    127.0.0.1 rads.mcafee.com
    127.0.0.1 trendmicro.com
    127.0.0.1 pandasoftware.com
    127.0.0.1 www.pandasoftware.com
    127.0.0.1 www.trendmicro.com
    127.0.0.1 www.grisoft.com
    127.0.0.1 www.microsoft.com
    127.0.0.1 microsoft.com
    127.0.0.1 www.virustotal.com
    127.0.0.1 virustotal.com
    127.0.0.1 www.amazon.com
    127.0.0.1 www.amazon.co.uk
    127.0.0.1 www.amazon.ca
    127.0.0.1 www.amazon.fr
    127.0.0.1 www.paypal.com
    127.0.0.1 paypal.com
    127.0.0.1 moneybookers.com
    127.0.0.1 www.moneybookers.com
    127.0.0.1 www.ebay.com
    127.0.0.1 ebay.com
    127.0.0.1 [an unprintable character, code is 0xB]irusalert.nl


  11. Attempts to end the following processes, some of which may be security-related:
    ACKWIN32.EXE
    ADAWARE.EXE
    ADVXDWIN.EXE
    AGENTSVR.EXE
    AGENTW.EXE
    ALERTSVC.EXE
    ALEVIR.EXE
    ALOGSERV.EXE
    AMON9X.EXE
    ANTI-TROJAN.EXE
    ANTIVIRUS.EXE
    ANTS.EXE
    APIMONITOR.EXE
    APLICA32.EXE
    APVXDWIN.EXE
    ARR.EXE
    ATCON.EXE
    ATGUARD.EXE
    ATRO55EN.EXE
    ATUPDATER.EXE
    ATUPDATER.EXE
    ATWATCH.EXE
    AU.EXE
    AUPDATE.EXE
    AUPDATE.EXE
    AUTODOWN.EXE
    AUTODOWN.EXE
    AUTOTRACE.EXE
    AUTOTRACE.EXE
    AUTOUPDATE.EXE
    AUTOUPDATE.EXE
    AVCONSOL.EXE
    AVE32.EXE
    AVGCC32.EXE
    AVGCTRL.EXE
    AVGNT.EXE
    AVGSERV.EXE
    AVGSERV9.EXE
    AVGUARD.EXE
    AVGW.EXE
    AVKPOP.EXE
    AVKSERV.EXE
    AVKSERVICE.EXE
    AVKWCTl9.EXE
    AVLTMAIN.EXE
    AVNT.EXE
    AVP.EXE
    AVP32.EXE
    AVPCC.EXE
    AVPDOS32.EXE
    AVPM.EXE
    AVPTC32.EXE
    AVPUPD.EXE
    AVPUPD.EXE
    AVSCHED32.EXE
    AVSYNMGR.EXE
    AVWINNT.EXE
    AVWUPD.EXE
    AVWUPD32.EXE
    AVWUPD32.EXE
    AVWUPSRV.EXE
    AVXMONITOR9X.EXE
    AVXMONITORNT.EXE
    AVXQUAR.EXE
    AVXQUAR.EXE
    BACKWEB.EXE
    BARGAINS.EXE
    BD_PROFESSIONAL.EXE
    BEAGLE.EXE
    BELT.EXE
    BIDEF.EXE
    BIDSERVER.EXE
    BIPCP.EXE
    BIPCPEVALSETUP.EXE
    BISP.EXE
    BLACKD.EXE
    BLACKICE.EXE
    BLSS.EXE
    BOOTCONF.EXE
    BOOTWARN.EXE
    BORG2.EXE
    BPC.EXE
    BRASIL.EXE
    BS120.EXE
    BUNDLE.EXE
    BVT.EXE
    CCAPP.EXE
    CCEVTMGR.EXE
    CCPXYSVC.EXE
    CDP.EXE
    CFD.EXE
    CFGWIZ.EXE
    CFIADMIN.EXE
    CFIAUDIT.EXE
    CFIAUDIT.EXE
    CFINET.EXE
    CFINET32.EXE
    CLEAN.EXE
    CLEANER.EXE
    CLEANER3.EXE
    CLEANPC.EXE
    CLICK.EXE
    CMD32.EXE
    CMESYS.EXE
    CMGRDIAN.EXE
    CMON016.EXE
    CONNECTIONMONITOR.EXE
    CPD.EXE
    CPF9X206.EXE
    CPFNT206.EXE
    CTRL.EXE
    CV.EXE
    CWNB181.EXE
    CWNTDWMO.EXE
    CLAW95CF.EXE
    DATEMANAGER.EXE
    DCOMX.EXE
    DEFALERT.EXE
    DEFSCANGUI.EXE
    DEFWATCH.EXE
    DEPUTY.EXE
    DIVX.EXE
    DLLCACHE.EXE
    DLLREG.EXE
    DOORS.EXE
    DPF.EXE
    DPFSETUP.EXE
    DPPS2.EXE
    DRWATSON.EXE
    DRWEB32.EXE
    DRWEBUPW.EXE
    DSSAGENT.EXE
    DVP95.EXE
    DVP95_0.EXE
    ECENGINE.EXE
    EFPEADM.EXE
    EMSW.EXE
    ENT.EXE
    ESAFE.EXE
    ESCANHNT.EXE
    ESCANV95.EXE
    ESPWATCH.EXE
    ETHEREAL.EXE
    ETRUSTCIPE.EXE
    EVPN.EXE
    EXANTIVIRUS-CNET.EXE
    EXE.AVXW.EXE
    EXPERT.EXE
    EXPLORE.EXE
    F-PROT.EXE
    F-PROT95.EXE
    F-STOPW.EXE
    FAMEH32.EXE
    FAST.EXE
    FCH32.EXE
    FIH32.EXE
    FINDVIRU.EXE
    FIREWALL.EXE
    FNRB32.EXE
    FP-WIN.EXE
    FP-WIN_TRIAL.EXE
    FPROT.EXE
    FRW.EXE
    FSAA.EXE
    FSAV.EXE
    FSAV32.EXE
    FSAV530STBYB.EXE
    FSAV530WTBYB.EXE
    FSAV95.EXE
    FSGK32.EXE
    FSM32.EXE
    FSMA32.EXE
    FSMB32.EXE
    GATOR.EXE
    GBMENU.EXE
    GBPOLL.EXE
    GENERICS.EXE
    GMT.EXE
    GUARD.EXE
    GUARDDOG.EXE
    HACKTRACERSETUP.EXE
    HBINST.EXE
    HBSRV.EXE
    HOTACTIO.EXE
    HOTPATCH.EXE
    HTLOG.EXE
    HTPATCH.EXE
    HWPE.EXE
    HXDL.EXE
    HXIUL.EXE
    IAMAPP.EXE
    IAMSERV.EXE
    IAMSTATS.EXE
    IBMASN.EXE
    IBMAVSP.EXE
    ICLOADNT.EXE
    ICMON.EXE
    ICSUPP95.EXE
    ICSUPPNT.EXE
    IDLE.EXE
    IEDLL.EXE
    IEDRIVER.EXE
    IEXPLORER.EXE
    IFACE.EXE
    IFW2000.EXE
    INETLNFO.EXE
    INFUS.EXE
    INFWIN.EXE
    INIT.EXE
    INTDEL.EXE
    INTREN.EXE
    IOMON98.EXE
    ISTSVC.EXE
    JAMMER.EXE
    JDBGMRG.EXE
    JEDI.EXE
    KAVLITE40ENG.EXE
    KAVPERS40ENG.EXE
    KAVPF.EXE
    KAZZA.EXE
    KEENVALUE.EXE
    KERIO-PF-213-EN-WIN.EXE
    KERIO-WRL-421-EN-WIN.EXE
    KERIO-WRP-421-EN-WIN.EXE
    KERNEL32.EXE
    KILLPROCESSSETUP161.EXE
    LAUNCHER.EXE
    LDNETMON.EXE
    LDPRO.EXE
    LDPROMENU.EXE
    LDSCAN.EXE
    LNETINFO.EXE
    LOADER.EXE
    LOCALNET.EXE
    LOCKDOWN.EXE
    LOCKDOWN2000.EXE
    LOOKOUT.EXE
    LORDPE.EXE
    LSETUP.EXE
    LUALL.EXE
    LUALL.EXE
    LUAU.EXE
    LUCOMSERVER.EXE
    LUINIT.EXE
    LUSPT.EXE
    MAPISVC32.EXE
    MCAGENT.EXE
    MCMNHDLR.EXE
    MCSHIELD.EXE
    MCTOOL.EXE
    MCUPDATE.EXE
    MCUPDATE.EXE
    MCVSRTE.EXE
    MCVSSHLD.EXE
    MD.EXE
    MFIN32.EXE
    MFW2EN.EXE
    MFWENG3.02D30.EXE
    MGAVRTCL.EXE
    MGAVRTE.EXE
    MGHTML.EXE
    MGUI.EXE
    MINILOG.EXE
    MMOD.EXE
    MONITOR.EXE
    MOOLIVE.EXE
    MOSTAT.EXE
    MPFAGENT.EXE
    MPFSERVICE.EXE
    MPFTRAY.EXE
    MRFLUX.EXE
    MSAPP.EXE
    MSBB.EXE
    MSBLAST.EXE
    MSCACHE.EXE
    MSCCN32.EXE
    MSCMAN.EXE
    MSCONFIG.EXE
    MSDM.EXE
    MSDOS.EXE
    MSIEXEC16.EXE
    MSINFO32.EXE
    MSLAUGH.EXE
    MSMGT.EXE
    MSMSGRI32.EXE
    MSSMMC32.EXE
    MSSYS.EXE
    MSVXD.EXE
    MU0311AD.EXE
    MWATCH.EXE
    N32SCANW.EXE
    NAV.EXE
    AUTO-PROTECT.NAV80TRY.EXE
    NAVAP.NAVAPSVC.EXE
    NAVAPSVC.EXE
    NAVAPW32.EXE
    NAVDX.EXE
    NAVLU32.EXE
    NAVNT.EXE
    NAVSTUB.EXE
    NAVW32.EXE
    NAVWNT.EXE
    NC2000.EXE
    NCINST4.EXE
    NDD32.EXE
    NEOMONITOR.EXE
    NEOWATCHLOG.EXE
    NETARMOR.EXE
    NETD32.EXE
    NETINFO.EXE
    NETMON.EXE
    NETSCANPRO.EXE
    NETSPYHUNTER-1.2.EXE
    NETSTAT.EXE
    NETUTILS.EXE
    NISSERV.EXE
    NISUM.EXE
    NMAIN.EXE
    NOD32.EXE
    NORMIST.EXE
    NORTON_INTERNET_SECU_3.0_407.EXE
    NOTSTART.EXE
    NPF40_TW_98_NT_ME_2K.EXE
    NPFMESSENGER.EXE
    NPROTECT.EXE
    NPSCHECK.EXE
    NPSSVC.EXE
    NSCHED32.EXE
    NSSYS32.EXE
    NSTASK32.EXE
    NSUPDATE.EXE
    NT.EXE
    NTRTSCAN.EXE
    NTVDM.EXE
    NTXconfig.EXE
    NUI.EXE
    NUPGRADE.EXE
    NUPGRADE.EXE
    NVARCH16.EXE
    NVC95.EXE
    NVSVC32.EXE
    NWINST4.EXE
    NWSERVICE.EXE
    NWTOOL16.EXE
    OLLYDBG.EXE
    ONSRVR.EXE
    OPTIMIZE.EXE
    OSTRONET.EXE
    OTFIX.EXE
    OUTPOST.EXE
    OUTPOST.EXE
    OUTPOSTINSTALL.EXE
    OUTPOSTPROINSTALL.EXE
    PADMIN.EXE
    PANIXK.EXE
    PATCH.EXE
    PAVCL.EXE
    PAVPROXY.EXE
    PAVSCHED.EXE
    PAVW.EXE
    PCFWALLICON.EXE
    PCIP10117_0.EXE
    PCSCAN.EXE
    PDSETUP.EXE
    PERISCOPE.EXE
    PERSFW.EXE
    PERSWF.EXE
    PF2.EXE
    PFWADMIN.EXE
    PGMONITR.EXE
    PINGSCAN.EXE
    PLATIN.EXE
    POP3TRAP.EXE
    POPROXY.EXE
    POPSCAN.EXE
    PORTDETECTIVE.EXE
    PORTMONITOR.EXE
    POWERSCAN.EXE
    PPINUPDT.EXE
    PPTBC.EXE
    PPVSTOP.EXE
    PRIZESURFER.EXE
    PRMT.EXE
    PRMVR.EXE
    PROCDUMP.EXE
    PROCESSMONITOR.EXE
    PROCEXPLORERV1.0.EXE
    PROGRAMAUDITOR.EXE
    PROPORT.EXE
    PROTECTX.EXE
    PSPF.EXE
    PURGE.EXE
    QCONSOLE.EXE
    QSERVER.EXE
    RAPAPP.EXE
    RAV7.EXE
    RAV7WIN.EXE
    RAV8WIN32ENG.EXE
    RAY.EXE
    RB32.EXE
    RCSYNC.EXE
    REALMON.EXE
    REGED.EXE
    REGEDIT.EXE
    REGEDT32.EXE
    RESCUE.EXE
    RESCUE32.EXE
    RRGUARD.EXE
    RSHELL.EXE
    RTVSCAN.EXE
    RTVSCN95.EXE
    RULAUNCH.EXE
    RUN32DLL.EXE
    RUNDLL.EXE
    RUNDLL16.EXE
    RUXDLL32.EXE
    SAFEWEB.EXE
    SAHAGENT.EXE
    SAVE.EXE
    SAVENOW.EXE
    SBSERV.EXE
    SC.EXE
    SCAM32.EXE
    SCAN32.EXE
    SCAN95.EXE
    SCANPM.EXE
    SCRSCAN.EXE
    SETUPVAMEEVAL.EXE
    SETUP_FLOWPROTECTOR_US.EXE
    SFC.EXE
    SGSSFW32.EXE
    SH.EXE
    SHELLSPYINSTALL.EXE
    SHN.EXE
    SHOWBEHIND.EXE
    SMC.EXE
    SMS.EXE
    SMSS32.EXE
    SOAP.EXE
    SOFI.EXE
    SPERM.EXE
    SPF.EXE
    SPHINX.EXE
    SPOLER.EXE
    SPOOLCV.EXE
    SPOOLSV32.EXE
    SPYXX.EXE
    SREXE.EXE
    SRNG.EXE
    SS3EDIT.EXE
    SSGRATE.EXE
    SSG_4104.EXE
    ST2.EXE
    START.EXE
    STCLOADER.EXE
    SUPFTRL.EXE
    SUPPORT.EXE
    SUPPORTER5.EXE
    SVC.EXE
    SVCHOSTC.EXE
    SVCHOSTS.EXE
    SVSHOST.EXE
    SWEEP95.EXE
    SWEEPNET.SWEEPSRV.SYS.SWNETSUP.EXE
    SYMPROXYSVC.EXE
    SYMTRAY.EXE
    SYSEDIT.EXE
    SYSTEM.EXE
    SYSTEM32.EXE
    SYSUPD.EXE
    TASKMG.EXE
    TASKMO.EXE
    TASKMON.EXE
    TAUMON.EXE
    TBSCAN.EXE
    TC.EXE
    TCA.EXE
    TCM.EXE
    TDS-3.EXE
    TDS2-NT.EXE
    TEEKIDS.EXE
    TFAK.EXE
    TFAK5.EXE
    TGBOB.EXE
    TITANIN.EXE
    TITANINXP.EXE
    TRACERT.EXE
    TRICKLER.EXE
    TRJSCAN.EXE
    TRJSETUP.EXE
    TROJANTRAP3.EXE
    TSADBOT.EXE
    TVMD.EXE
    TVTMD.EXE
    UNDOBOOT.EXE
    UPDAT.EXE
    UPDATE.EXE
    UPDATE.EXE
    UPGRAD.EXE
    UTPOST.EXE
    VBCMSERV.EXE
    VBCONS.EXE
    VBUST.EXE
    VBWIN9X.EXE
    VBWINNTW.EXE
    VCSETUP.EXE
    VET32.EXE
    VET95.EXE
    VETTRAY.EXE
    VFSETUP.EXE
    VIR-HELP.EXE
    VIRUSMDPERSONALFIREWALL.EXE
    VNLAN300.EXE
    VNPC3000.EXE
    VPC32.EXE
    VPC42.EXE
    VPFW30S.EXE
    VPTRAY.EXE
    VSCAN40.EXE
    VSCENU6.02D30.EXE
    VSCHED.EXE
    VSECOMR.EXE
    VSHWIN32.EXE
    VSISETUP.EXE
    VSMAIN.EXE
    VSMON.EXE
    VSSTAT.EXE
    VSWIN9XE.EXE
    VSWINNTSE.EXE
    VSWINPERSE.EXE
    W32DSM89.EXE
    W9X.EXE
    WATCHDOG.EXE
    WEBDAV.EXE
    WEBSCANX.EXE
    WEBTRAP.EXE
    WFINDV32.EXE
    WHOSWATCHINGME.EXE
    WIMMUN32.EXE
    WIN-BUGSFIX.EXE
    WIN32.EXE
    WIN32US.EXE
    WINACTIVE.EXE
    WINDOW.EXE
    WINDOWS.EXE
    WININETD.EXE
    WININIT.EXE
    WININITX.EXE
    WINLOGIN.EXE
    WINMAIN.EXE
    WINNET.EXE
    WINPPR32.EXE
    WINRECON.EXE
    WINSERVN.EXE
    WINSSK32.EXE
    WINSTART.EXE
    WINSTART001.EXE
    WINTSK32.EXE
    WINUPDATE.EXE
    WKUFIND.EXE
    WNAD.EXE
    WNT.EXE
    WRADMIN.EXE
    WRCTRL.EXE
    WSBGATE.EXE
    WUPDATER.EXE
    WUPDT.EXE
    WYVERNWORKSFIREWALL.EXE
    XPF202EN.EXE
    ZAPRO.EXE
    ZAPSETUP3001.EXE
    ZATUTOR.EXE
    ZONALM2601.EXE
    ZONEALARM.EXE
    _AVP32.EXE
    _AVPCC.EXE
    _AVPM.EXE
    CMD.EXE
    TASKMGR.EXE
    NEC.EXE


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: Dong Hoon Lee
Summary| Technical Details| Removal

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