W32.Mydoom.AS@mm

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Discovered: February 09, 2005
Updated: February 13, 2007 12:33:17 PM
Also Known As: Win32.Mydoom.AP [Computer Asso, Email-Worm.Win32.Mydoom.ak [Ka, W32/Mydoom.ba@MM [McAfee], W32/MyDoom-AR [Sophos], WORM_MYDOOM.AR [Trend Micro]
Type: Worm
Systems Affected: Windows


W32.Mydoom.AS@mm is a mass-mailing worm that uses its own SMTP engine to send itself to email addresses that it finds on the compromised computer. It also propagates through file sharing networks.

The email will have a variable subject and attachment name. The attachment will have a .bat, .cmd, .exe, .pif, .scr, or .zip file extension.



Removing entries from the Hosts file
If this threat has modified the Windows Hosts file, there are two ways to remove these entries:

  • Install and run the current version of LiveUpdate. This will remove only the entries that refer to Symantec domains.
  • Manually edit the Hosts file and remove all the entries that the worm added.

To run the current version of LiveUpdate
  1. Click download LiveUpdate.

    Note:
    If you are not reading this Web page on the computer that is getting the error notice, the address for downloading the file is:

    ftp://ftp.symantec.com/public/english_us_canada/liveupdate/lusetup.exe

    If necessary, you can type this address into the address bar of the problem computer. Changes to the Hosts file will not stop you from getting to this site.

  2. Save the file to the Windows desktop.
  3. Double-click the lusetup.exe icon on the desktop to install LiveUpdate.
  4. Run LiveUpdate.
  5. Did you see the message "LU1860: LiveUpdate has detected a potential security compromise on your computer"?
    • If you did, let LiveUpdate "Remove these entries from the hosts files" (Recommended).
      This should allow LiveUpdate to run.
    • If you did not, that was not the cause of the problem. Return to the Removal section.


To manually edit the Hosts file and remove all the entries that the worm added

Note: The location of the Hosts file may vary and some computers may not have this file. For example, if the file exists in Windows 98, it will usually be in C:\Windows; and it is located in the C:\WINNT\system32\drivers\etc folder in Windows 2000. There may also be multiple copies of this file in different locations.


Follow the instructions for your operating system:
  • Windows 95/98/Me/NT/2000
    1. Click Start, point to Find or Search, and then click Files or Folders.
    2. Make sure that "Look in" is set to (C:) and that "Include subfolders" is checked.
    3. In the "Named" or "Search for..." box, type:

      hosts

    4. Click Find Now or Search Now.
    5. For each Hosts file that you find, right-click the file, and then click Open With.
    6. Deselect the "Always use this program to open this program" check box.
    7. Scroll through the list of programs and double-click Notepad.
    8. When the file opens, delete all the entries in step 14 of the "Technical Details" section.
    9. Close Notepad and save your changes when prompted.

  • Windows XP
    1. Click Start > Search.
    2. Click All files and folders.
    3. In the "All or part of the file name" box, type:

      hosts

    4. Verify that "Look in" is set to "Local Hard Drives" or to (C:).
    5. Click More advanced options.
    6. Check Search system folders.
    7. Check Search subfolders.
    8. Click Search.
    9. Click Find Now or Search Now.
    10. For each Hosts file that you find, right-click the file, and then click Open With.
    11. Deselect the Always use this program to open this program check box.
    12. Scroll through the list of programs and double-click Notepad.
    13. When the file opens, delete all the entries in step 14 of the "Technical Details" section.
    14. Close Notepad and save your changes when prompted.

Antivirus Protection Dates

  • Initial Rapid Release version February 09, 2005
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 09, 2005
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date February 09, 2005

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

Writeup By: Yana Liu

Discovered: February 09, 2005
Updated: February 13, 2007 12:33:17 PM
Also Known As: Win32.Mydoom.AP [Computer Asso, Email-Worm.Win32.Mydoom.ak [Ka, W32/Mydoom.ba@MM [McAfee], W32/MyDoom-AR [Sophos], WORM_MYDOOM.AR [Trend Micro]
Type: Worm
Systems Affected: Windows


When W32.Mydoom.AS@mm runs, it does the following:

  1. Adds the value:

    "ShellSmash"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer

    as an infection marker.

  2. Checks the current system time. If the day is Feb. 10, 2005 or later, the worm quits. Otherwise, it performs the following actions.

  3. Creates the following files:

    • %System%\lsasrv.exe
    • %System%\version.ini
    • %System%\hserv.sys

      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).

  4. May create the following files:

    • %System%\upd.ini
    • %System%\rtoks.tmp
    • %System%\frka304k.tmp
    • %System%\kjberk2e.tmp
    • ejd734dk.tmp
    • ecd235k.tmp

  5. Adds the value:

    "lsass" = "%System%\lsasrv.exe"

    to the registry subkeys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

    so that the worm is executed every time Windows starts.

  6. Modifies the value:

    "Shell" = "explorer.exe %System%\lsasrv.exe"

    in the registry subkeys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
    HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon

    so that the worm is executed every time Windows starts.

  7. Creates a mutex named "-=RTSW.Smash 0a2a1=-", so that only one instance of the worm will be executed on the compromised computer.

  8. Creates a text file containing garbage data only, called %UserProfile%\Local Settings\Temp\ Mes#wtelw.txt. The worm uses Notepad to open the file and display the garbage text.

    Note: %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).

  9. Copies itself into the shared folders of Kazaa, Morpheus, iMesh, eDonkey, or LimeWire under one of the following names:

    • porno
    • NeroBROM6.3.1.27
    • avpprokey
    • Ad-awareref01R349
    • winxp_patch
    • adultpasswds
    • dcom_patches
    • K-LiteCodecPack2.34a
    • activation_crack
    • icq2004-final
    • winamp5

      Note: The file has either a .bat, .pif, .scr, or .exe extension.

  10. Attempts to delete the following values:

    • TaskMon
    • PandaAVEngine
    • System MScvb
    • sysinfo.e

      from the registry subkey:

      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  11. Attempts to delete the following values:

    • xewindows auto update
    • Microsoft Inet Xp

      from the registry subkey:

      HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  12. Attempts to delete the following files:

    • %System%/taskmon.exe
    • %System%/PandaAVEngine.exe
    • %System%/sysinfo.exe
    • %System%/mscvb32.exe
    • %System%/msblast.exe
    • %System%/teekids.exe
    • %System%/Penis32.exe

  13. Attempts to disable the following processes, which include components of other threats as well as firewall and antivirus applications:

    • bbeagle.exe
    • d3dupdate.exe
    • i11r54n4.exe
    • irun4.exe
    • msblast.exe
    • msblast.exe
    • mscvb32.exe
    • navapw32.exe
    • navw32.exe
    • netstat.exe
    • outpost.exe
    • pandaavengine.exe
    • penis32.exe
    • rate.exe
    • ssate.exe
    • sysinfo.exe
    • sysmonxp.exe
    • taskmon.exe
    • teekids.exe
    • wincfg32.exe
    • winsys.exe
    • winupd.exe
    • zapro.exe
    • zonealarm.exe

  14. Appends the following lines to the Hosts file to prevent access to security-related Web sites:

    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 www.f-secure.com
    127.0.0.1 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 avp.com
    127.0.0.1 www.kaspersky.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 www.my-etrust.com
    127.0.0.1 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 www.nai.com
    127.0.0.1 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 www.trendmicro.com
    127.0.0.1 trendmicro.com
    127.0.0.1 www.grisoft.com
    127.0.0.1 grisoft.com

  15. Gathers email addresses from the Windows Address Book and from files with the following extensions:

    • .adb
    • .asa
    • .asc
    • .asm
    • .asp
    • .cgi
    • .con
    • .csp
    • .dbx
    • .dlt
    • .dwt
    • .edm
    • .hta
    • .htc
    • .htm
    • .inc
    • .jsp
    • .jst
    • .lbi
    • .php
    • .pl
    • .rdf
    • .rss
    • .sht
    • .ssi
    • .stm
    • .tbb
    • .tpl
    • .txt
    • .vbp
    • .vbs
    • .wml
    • .xht
    • .xml
    • .xsd
    • .xst

      It avoids email addresses that contain any of the following strings:

    • .gov
    • .mil
    • account
    • acketst
    • admin
    • anyone
    • arc
    • arin.
    • avp
    • berkley
    • borlan
    • bsd
    • bugs
    • ca
    • certific
    • contact
    • example
    • feste
    • fido
    • foo.
    • fsf.
    • gnu
    • gold-certs
    • google
    • gov.
    • help
    • hotmail
    • iana
    • ibm.com
    • icrosoft
    • ietf
    • info
    • inpris
    • isc.o
    • isi.e
    • kernel
    • linux
    • listserv
    • me
    • mit.e
    • mozilla
    • msn.
    • mydomai
    • no
    • nobody
    • nodomai
    • noone
    • not
    • nothing
    • ntivi
    • page
    • panda
    • pgp
    • postmaster
    • privacy
    • rating
    • rfc-ed
    • ripe.
    • root
    • ruslis
    • samples
    • secur
    • sendmail
    • service
    • site
    • soft
    • somebody
    • someone
    • sopho
    • submit
    • support
    • syma
    • tanford.e
    • the.bat
    • unix
    • unix
    • usenet
    • utgers.ed
    • webmaster
    • you
    • your

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

      From:
      The worm selects a sender's name from its own list and appends it to a selected domain. A complete list is given and the end of Technical Description.


      Subject:
      One of the following:

    • [Blank]
    • Attention!!!
    • Do not reply to this email
    • Error
    • Good day
    • hello
    • Mail Delivery System
    • Mail Transaction Failed
    • Server Report
    • Status
    • hello


      Message body:
      One of the following:

    • The message contains Unicode characters and has been sent as a binary attachment.
    • The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.
    • Mail transaction failed. Partial message is available.
    • Do not visit these sites!!!
    • You have visited illegal websites.
      I have a big list of the websites you surfed.
    • You think it's funny? You are stupid idiot!!! I'll send the attachment
      to your ISP and then I'll be watching how you will go to jail, punk!!!
    • Your credit card was charged for $500 USD. For additional information
      see the attachment
    • ESMTP [Secure Mail System #334]:  Secure message is attached.
    • Encrypted message is available.
    • Delivered message is attached.
    • Can you confirm it?
    • Binary message is available.
    • am shocked about your document!
    • Are you a spammer? (I found your email on a spammer website!
    • Bad Gateway: The message has been attached.
    • Here is your documents you are requested.
    • [link to the mcafee.com domain
      Attention! New self-spreading virus!
      Be careful, a new self-spreading virus called "RTSW.Smash" spreading  
      very fast via e-mail and P2P networks. It's about two million people  
      infected and it will be more.
      To avoid your infection by this virus and to stop it we provide you with
      full information how to protect yourself against it and also including
      free remover. Your can find it in the attachment.
      2004 Networks Associates Technology, Inc. All Rights Reserved
    • [link to the worldbank.org domain]
      New terms and conditions for credit card holders
      Here a new terms and conditions for credit card holders using a credit
      cards for making purchase in the Internet in the attachment. Please, read
      it carefully. If you are not agree with new terms and conditions do not
      use your credit card in the World Wide Web.
      Thank you,
      The World Bank Group
      2004 The World Bank Group, All Rights Reserved
    • [several links to a .jpg file on the .worldxxxpass.com domain]
      Thank you for registering at WORLDXXXPASS.COM
      All your payment info, login and password you can find in the attachment
      file.
      It's a real good choise to go to WORLDXXXPASS.COM
      [several links to a .jpg file on the .worldxxxpass.com domain]
    • [link to the ifccfbi.gov domain]
      Attention! Your IP was logged by The Internet Fraud Complaint Center
      Your IP was logged by The Internet Fraud Complaint Center. There was a
      fraud attempt logged by The Internet Fraud Complaint Center from your IP.
      This is a serious crime, so all records was sent to the FBI.
      All information you can find in the attachment. Your IP was flagged and
      if there will be anover attemption you will be busted.
    • [link to the ifccfbi.gov domain]
      This message is brought to you by the Federal Bureau of Investigation
      [link to the ifccfbi.gov domain]" and the National White Collar Crime Center
      [link to the nw3c.org domain]


      Attachment name:
      One of the following:

    • body
    • message
    • docs
    • data
    • file
    • rules
    • doc
    • readme
    • document

      With one of the following extensions:

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

From Address:
The worm selects a sender's name from its own list as described above in Step 16.

The sender's name is one of the following:

    •  Abdulrazak
    •  Ackerman
    •  Adams
    •  Addison
    •  Adelstein
    •  Adibe
    •  Adorno
    •  Ahlers
    •  Alavi
    •  Alcorn
    •  Aleks
    •  Allison
    •  Alongi
    •  Altavilla
    •  Altenberger
    •  Altenhofen
    •  Amaral
    •  Amatangelo
    •  Ameer
    •  Amsden
    •  Anand
    •  Andel
    •  Andrelus
    •  Andron
    •  Anfinrud
    •  Ansley
    •  Anthony
    •  Antos
    •  Arbia
    •  Arduini
    •  Arellano
    •  Aristotle
    •  Arjas
    •  Atkins
    •  Augustus
    •  Aurelius
    •  Axelrod
    •  Axworthy
    •  Ayiemba
    •  Aykroyd
    •  Ayling
    •  Azima
    •  Bachmuth
    •  Backus
    •  Baglivo
    •  Bagnold
    •  Bailar
    •  Bakanowsky
    •  Baleja
    •  Ballatori
    •  Ballew
    •  Baltz
    •  Banta
    •  Barabesi
    •  Barajas
    •  Baranczak
    •  Baranowska
    •  Barberi
    •  Barbetti
    •  Barneson
    •  Barnett
    •  Barriola
    •  Barry
    •  Bartholomew
    •  Bartolome
    •  Bartoo
    •  Basavappa
    •  Bashevis
    •  Batchelder
    •  Baumiller
    •  Bayles
    •  Beacon
    •  Beckman
    •  Beder
    •  Bedford
    •  Behenna
    •  Belanger
    •  Belaoussof
    •  Belfer
    •  Belin-Collart
    •  Bellavance
    •  Bellhouse
    •  Bellini
    •  Belloc
    •  Benedict-Dye
    •  Bergson
    •  Berke-Jenkins
    •  Bernardo
    •  Bernassola
    •  Bernston
    •  Berrizbeitia
    •  Betti
    •  Beynart
    •  Biagioli
    •  Bickel
    •  Binion
    •  Bisema
    •  Bisho
    •  Blackbourn
    •  Blackwell
    •  Blagg
    •  Blakemore
    •  Blanke
    •  Bliss
    •  Blizard
    •  Bloch
    •  Bloembergen
    •  Bloemhof
    •  Bloxham
    •  Blyth
    •  Bolger
    •  Bolick
    •  Bollinger
    •  Bologna
    •  Boner
    •  Bonham
    •  Boniface
    •  Bontempo
    •  Bookbinder
    •  Boone
    •  Boorstin
    •  Borack
    •  Borden
    •  Bossi
    •  Bothman
    •  Botosh
    •  Boudin
    •  Boudrot
    •  Bourneuf
    •  Bowers
    •  Boxer
    •  Boyajian
    •  Boyes
    •  Boyland
    •  Boyne
    •  Bracalente
    •  Bradac
    •  Bradach
    •  Brecht
    •  Breed
    •  Brenan
    •  Brennan
    •  Brewer
    •  Bridgeman
    •  Bridges
    •  Brinton
    •  Britz
    •  Broca
    •  Brook
    •  Brzycki
    •  Buchan
    •  Budding
    •  Bullard
    •  Bunton
    •  Burden
    •  Burdzy
    •  Burke
    •  Burridge
    •  Busetta
    •  Byatt
    •  Byerly
    •  Calnan
    •  Cammelli
    •  Cammilleri
    •  Canley
    •  Capanni
    •  Caperton
    •  Capocaccia
    •  Capodilupo
    •  Cappuccio
    •  Capursi
    •  Caratozzolo
    •  Carayannopoulos
    •  Carlin
    •  Carlos
    •  Carlyle
    •  Carmichael
    •  Caroti
    •  Carper
    •  Cartmill
    •  Cascio
    •  Caspar
    •  Castelda
    •  Cavanagh
    •  Cavell
    •  Ceniceros
    •  Cerioli
    •  Chapman
    •  Charles
    •  Cheang
    •  Cherry
    •  Chervinsky
    •  Chiassino
    •  Chien
    •  Childress
    •  Childs
    •  Chinipardaz
    •  Chinman
    •  Christenson
    •  Christian
    •  Christiano
    •  Christie
    •  Christopher
    •  Chupasko
    •  Church
    •  Ciampaglia
    •  Cicero
    •  Cifarelli
    •  Claffey
    •  Clancy
    •  Clark
    •  Clement
    •  Clifton
    •  Coblenz
    •  Coito
    •  Coldren
    •  Colella
    •  Collard
    •  Collis
    •  Compton
    •  Comstock
    •  Concino
    •  Condodina
    •  Connors
    •  Corey
    •  Cornish
    •  Cosmides
    •  Counter
    •  Coutaux
    •  Crawford
    •  Crocker
    •  Croshaw
    •  Croxen
    •  Croxton
    •  Cunningham
    •  Currier
    •  Cutler
    •  Cyders
    •  D'Ambra
    •  D'arcangelo
    •  D'fini
    •  D'souza
    •  Daldalian
    •  Danieli
    •  Dante
    •  Dapice
    •  Dasgupta
    •  Daskalu
    •  David
    •  Dawkins
    •  DeGennaro
    •  DeLaPena
    •  Debroff
    •  Defeciani
    •  Delattre
    •  Deleon-Rendon
    •  Delger
    •  Dell'acqua
    •  Deming
    •  Dempster
    •  Demusz
    •  Denault
    •  Denham
    •  Denison
    •  Desombre
    •  Deutsch
    •  Dicks
    •  Diefenbach
    •  Difabio
    •  Difronzo
    •  Dilworth
    •  Dionysius
    •  Dirksen
    •  Dockery
    •  Doherty
    •  Donahue
    •  Donner
    •  Doonan
    •  Dowsland
    •  Drinker
    •  Duffin
    •  Durrett
    •  Dussault
    •  Dwyer
    •  Eardley
    •  Ebeling
    •  Eckel
    •  Edley
    •  Edner
    •  Edward
    •  Eickenhorst
    •  Eliasson
    •  Elmendorf
    •  Elmerick
    •  Elvis
    •  Encinas
    •  Enyeart
    •  Eppling
    •  Erbach
    •  Erdman
    •  Erdos
    •  Espinoza
    •  Estes
    •  Etter
    •  Euripides
    •  Everett
    •  Fabbris
    •  Fagan
    •  Faioes
    •  Falco-Acosta
    •  Falorsi
    •  Faris
    •  Farone
    •  Farren
    •  Fasso'
    •  Fates
    •  Feigenbaum
    •  Fejzo
    •  Feldman
    •  Fernald
    •  Fernandes
    •  Ferrante
    •  Ferriell
    •  Feuer
    •  Field
    •  Finkelstein
    •  Finnegan
    •  Fiorina
    •  Fitzmaurice
    •  Flier
    •  Flores
    •  Folks
    •  Forester
    •  Fortes
    •  Fortier
    •  Fossey
    •  Fossi
    •  Francisco
    •  Franklin-Kenea
    •  Franz
    •  Frazier-Davis
    •  Freid
    •  Freundlich
    •  Fried
    •  Friedland
    •  Frisken
    •  Frowiss
    •  Fryberger
    •  Fujii-Abe
    •  Fuller
    •  Furth
    •  Fusaro
    •  Gabrielli
    •  Gaggiotti
    •  Galeotti
    •  Galwey
    •  Gambini
    •  Garfield
    •  Garman
    •  Garonna
    •  Geller
    •  Gemberling
    •  Georgi
    •  Gerrett
    •  Ghorai
    •  Gibbens
    •  Gibson
    •  Gilbert
    •  Gillispie
    •  Gleason
    •  Glegg
    •  Glendon
    •  Goldfarb
    •  Goncalves
    •  Gonzalez
    •  Goodearl
    •  Goody
    •  Gozzi
    •  Gravell
    •  Greenberg
    •  Greenfeld
    •  Griffiths
    •  Grigoletto
    •  Grummell
    •  Gruner
    •  Gruppe
    •  Guenthart
    •  Hackman
    •  Hackshaw
    •  Haley
    •  Halkias
    •  Hallowell
    •  Halpert
    •  Hambarzumjan
    •  Hamer
    •  Hammerness
    •  Hanssen
    •  Harding
    •  Hargraves
    •  Harlow
    •  Harrigan
    •  Hartman
    •  Hartmann
    •  Hartnett
    •  Harwell
    •  Haviaras
    •  Hawkes
    •  Hayes
    •  Haynes
    •  Hazlewood
    •  Heermans
    •  Heiland
    •  Hellman
    •  Hellmiss
    •  Helprin
    •  Hemphill
    •  Henery
    •  Henrichs
    •  Hernandez
    •  Herrera
    •  Hester
    •  Heubert
    •  Heyeck
    •  Himmelfarb
    •  Hirst
    •  Hitchcock
    •  Hoang
    •  Hoffer
    •  Hoffman
    •  Hokanson
    •  Hokoda
    •  Holmes
    •  Holoien
    •  Holter
    •  Holway
    •  Holzman
    •  Hooker
    •  Hopkins
    •  Horsley
    •  Hoshida
    •  Hostage
    •  Hottle
    •  Howard
    •  Huidekoper
    •  Hungerford
    •  Huntington
    •  Hurtubise
    •  Hutchings
    •  Iaquinta
    •  Ichikawa
    •  Igarashi
    •  Inamura
    •  Inniss
    •  Isaac
    •  Isaievych
    •  Isbill
    •  Isserman
    •  Jacenko
    •  Jackson
    •  Jagers
    •  Jagger
    •  Jagoe
    •  Jamil
    •  Janjigian
    •  Jarnagin
    •  Jarrell
    •  Jeffers
    •  Jellis
    •  Jenkins
    •  Jespersen
    •  Jewett
    •  Johannesson
    •  Johannsen
    •  Johns
    •  Jolly
    •  Jorgensen
    •  Jucks
    •  Juliano
    •  Julious
    •  Kabbash
    •  Kaboolian
    •  Kafadar
    •  Kalbfleisch
    •  Kaligian
    •  Kalil
    •  Kalinowski
    •  Kalman
    •  Kamel
    •  Kangis
    •  Karpouzes
    •  Kassower
    •  Kasten
    •  Kawachi
    •  Keenan
    •  Keepper
    •  Keith
    •  Kelker
    •  Kelsey
    •  Kempton
    •  Kemsley
    •  Kendall
    •  Kerry
    •  Khong
    •  Kimmel
    •  Kimmett
    •  Kimura
    •  Kindall
    •  Kinsley
    •  Kippenberger
    •  Kirscht
    •  Kittridge
    •  Kleckner
    •  Kleiman
    •  Kleinfelder
    •  Klemperer
    •  Kling
    •  Klinkenborg
    •  Klint
    •  Knuff
    •  Kobrick
    •  Koivumaki
    •  Kommer
    •  Koniaris
    •  Konrad
    •  Korzybski
    •  Kotter
    •  Kovaks
    •  Kraemer
    •  Krailo
    •  Krasney
    •  Kraus
    •  Kroemer
    •  Krysiak
    •  Kuenzli
    •  Kumar
    •  Kusman
    •  Kuwabara
    •  Labunka
    •  Lafler
    •  Laing
    •  Lallemant
    •  Landes
    •  Lankes
    •  Lantieri
    •  Lanzit
    •  Laserna
    •  Lashley
    •  Lawless
    •  Lecar
    •  Lecce
    •  Leclercq
    •  Leite
    •  Lenard
    •  Lesser
    •  Lessi
    •  Liakos
    •  Lidano
    •  Light
    •  Lightfoot
    •  Linares
    •  Linda
    •  Linder
    •  Linehan
    •  Linzee
    •  Lippmann
    •  Lipponen
    •  Little
    •  Litvak
    •  Livernash
    •  Livolsi
    •  Lizardo
    •  Locatelli
    •  Longworth
    •  Loveman
    •  Lowenstein
    •  Lubin
    •  Lucas
    •  Luciano
    •  Luczkow
    •  Luecke
    •  Lunetta
    •  Luoma
    •  Lussier
    •  Lutcavage
    •  Luzader
    •  MacMillan
    •  Maccormac
    •  Macdonald
    •  Maceachern
    •  Macintyre
    •  Mackenney
    •  Madigan
    •  Maggio
    •  Mahony
    •  Maier
    •  Maine-Hershey
    •  Maisano
    •  Malatesta
    •  Maller
    •  Malova
    •  Manalis
    •  Mandel
    •  Manganiello
    •  Mantovan
    •  March
    •  Marchbanks
    •  Marcus
    •  Margalit
    •  Margetts
    •  Marques
    •  Martinez
    •  Martochio
    •  Marton
    •  Marubini
    •  Matalka
    •  Matarazzo
    •  Matsukata
    •  Mattson
    •  Mauzy
    •  Mazzali
    •  Mazziotta
    •  McFadden
    •  McIlroy
    •  Mcbride
    •  Mccaffery
    •  Mccall
    •  Mcclearn
    •  Mcdowell
    •  Mcelroy
    •  Mcghee
    •  Mcgoldrick
    •  Mcintosh
    •  Mckenna
    •  Mclane
    •  Mclaren
    •  Mcnealy
    •  Mcnulty
    •  Meccariello
    •  Memisoglu
    •  Menzies
    •  Merikoski
    •  Merlani
    •  Merminod
    •  Merseth
    •  Metelka
    •  Metropolis
    •  Meurer
    •  Michelman
    •  Middle
    •  Mieher
    •  Mills
    •  Minichiello
    •  Mitropoulos
    •  Mittal
    •  Mocroft
    •  Modestino
    •  Moeller
    •  Moiamedi
    •  Monque
    •  Montilio
    •  MooreDeCh.
    •  Morani
    •  Moreton
    •  Morrison
    •  Morrow
    •  Mortimer
    •  Mosher
    •  Mosler
    •  Mostafavi
    •  Motooka
    •  Mudarri
    •  Muello
    •  Mugnai
    •  Mulkern
    •  Mulroy
    •  Mumford
    •  Mussachio
    •  Naddeo
    •  Napolitano
    •  Nardi
    •  Nardone
    •  Naviaux
    •  Nayduch
    •  Nelson
    •  Nenna
    •  Nesci
    •  Neuman
    •  Newfeld
    •  Newlin
    •  Nickerson
    •  Nickoloff
    •  Nisenson
    •  Nitabach
    •  Notman
    •  Nuzum
    •  O'hagan
    •  O'malley
    •  O'meara
    •  Ocougne
    •  Ogata
    •  Oldford
    •  Olsen
    •  Olson
    •  Olszewski
    •  Orfield
    •  Ospina
    •  Ostrowski
    •  Ottaviani
    •  Otten
    •  Ouchida
    •  PaesDealmeida
    •  Paine
    •  Palayoor
    •  Palepu
    •  Pallara
    •  Palmitesta
    •  Panadero
    •  Panizzon
    •  Pantilla
    •  Paoletti
    •  Parmeggiani
    •  Parris
    •  Partridge
    •  Pascucci
    •  Patefield
    •  Patrick
    •  Pattullo
    •  Pavetti
    •  Pavlon
    •  Pawloski
    •  Paynter
    •  Peabody
    •  Pearlberg
    •  Pederson
    •  Peishel
    •  Penny
    •  Pereira
    •  Perko
    •  Perlak
    •  Perlman
    •  Perna
    •  Perone
    •  Perrimon
    •  Peters
    •  Petruzello
    •  Pettibone
    •  Pettit
    •  Pfister
    •  Pilbeam
    •  Pinot
    •  Plancon
    •  Plant
    •  Plasket
    •  Plous
    •  Pocobene
    •  Poincaire
    •  Pointer
    •  Poirier
    •  Polak
    •  Polanyi
    •  Politis
    •  Poolman
    •  Powers
    •  Presper
    •  Preucel
    •  Prevost
    •  Pritchard
    •  Pritz
    •  Proietti
    •  Prothrow-Stith
    •  Puccia
    •  Pynchon
    •  Quaday
    •  Quetin
    •  Rabkin
    •  Radeke
    •  Rajagopalan
    •  Raney
    •  Rangan
    •  Rankin
    •  Rapple
    •  Rayport
    •  Redden-Tyler
    •  Reedquist
    •  Reinold
    •  Remak
    •  Renick
    •  Repetto
    •  Resnik
    •  Richmond
    •  Rielly
    •  Rindos
    •  Rineer
    •  Rivera
    •  Robinson
    •  Rocha
    •  Roesler
    •  Rogers
    •  Ronen
    •  Royal
    •  Ruderman
    •  Ruescher
    •  Sabatello
    •  Sadler
    •  Safire
    •  Samson
    •  Sanchez-Ramirez
    •  Sanna
    •  Sapers
    •  Sarin
    •  Sartore
    •  Satin
    •  Satta
    •  Satterthwaite
    •  Sawtell
    •  Sayied
    •  Scarponi
    •  Scepan
    •  Scharf
    •  Scharlemann
    •  Scheiner
    •  Schiano
    •  Schifini
    •  Schilling
    •  Schmitt
    •  Schossberger
    •  Schuman
    •  Schutte
    •  Schuyler
    •  Schwan
    •  Schwickrath
    •  Scovel
    •  Scudder
    •  Seaton
    •  Seeber
    •  Segal
    •  Sekler
    •  Selvage
    •  Sennett
    •  Seterdahl
    •  Sexton
    •  Seyfert
    •  Shaikh
    •  Shakis
    •  Shankland
    •  Shanley
    •  Shatrov
    •  Shavelson
    •  Sheats
    •  Shepherd
    •  Sheppard
    •  Shepstone
    •  Shesko
    •  Shibata
    •  Shimon
    •  Siesto
    •  Sigalot
    •  Sigini
    •  Signa
    •  Silverman
    •  Silvetti
    •  Sinsabaugh
    •  Sirilli
    •  Sites
    •  Skane
    •  Skerry
    •  Skoda
    •  Sloan
    •  Slowe
    •  Smilow
    •  Sniffen
    •  Snodgrass
    •  Socolow
    •  Solon
    •  Somers
    •  Sommariva
    •  Sorabella
    •  Sottak
    •  Soukup
    •  Soule
    •  Soultanian
    •  Spanier
    •  Sparrow
    •  Spaulding
    •  Speizer
    •  Spence
    •  Sperber
    •  Spicer
    •  Spiegelhalter
    •  Spiliotis
    •  Spinrad
    •  StMartin
    •  Stalvey
    •  Stang
    •  Stassinopolus
    •  States
    •  Statlender
    •  Stefani
    •  Steiner
    •  Stephanian
    •  Stepniewska
    •  Stewart-Oaten
    •  Stiepock
    •  Stillwell
    •  Stock
    •  Stockton
    •  Stockwell
    •  Stolzenberg
    •  Stonich
    •  Storer
    •  Stott
    •  Strange
    •  Strauch
    •  Streiff
    •  Stringer
    •  Sullivan
    •  Sumner
    •  Surdam
    •  Sweeting
    •  Sweetser
    •  Swindle
    •  Tagiuri
    •  Talaugon
    •  Tambiah
    •  Tandler
    •  Tanowitz
    •  Tatar
    •  Taveras
    •  Tcherepnin
    •  Teague
    •  Temes
    •  Temmer
    •  Tenney
    •  Terracini
    •  Thavaneswaran
    •  Theodos
    •  Thibault
    •  Thisted
    •  Thomsen
    •  Throop
    •  Tierney
    •  Timmons
    •  Tofallis
    •  Tollestrup
    •  Tolls
    •  Tolman
    •  Tomford
    •  Toomer
    •  Topulos
    •  Torresi
    •  Torske
    •  Towler
    •  Traebert
    •  Trenga
    •  Trewin
    •  Tringali
    •  Troiani
    •  Truss
    •  Tsiatis
    •  Tsomides
    •  Tsukurov
    •  Tudge
    •  Tukan
    •  Turano
    •  Turek
    •  Tuttle
    •  Twells
    •  Tzamarias
    •  Ullman
    •  Untermeyer
    •  Upsdell
    •  Urban
    •  Urdang-Brown
    •  Usdan
    •  Uzuner
    •  Vacca
    •  Valberg
    •  Valencia
    •  VanZwet
    •  Vandenberg
    •  Vanheeckeren
    •  Vasquez
    •  Velasquez
    •  Venne
    •  Verghese
    •  Viana
    •  Viano
    •  Viens
    •  Vignola
    •  Villarreal
    •  Vitali
    •  Viviani
    •  Voigt
    •  VonHoffman
    •  Vorhaus
    •  Votey
    •  Waite
    •  Wales
    •  Wallenberg
    •  Walter
    •  Warshafsky
    •  Wasowska
    •  Waugh
    •  Weighart
    •  Weingarten
    •  Weinhaus
    •  Weissbourd
    •  Weissman
    •  Welles
    •  Welsh
    •  Wengret
    •  Wescott
    •  Wetzel
    •  Whately
    •  Whilton
    •  White
    •  Whitla
    •  Whittaker
    •  Wiedersheim
    •  Wiener
    •  Wilder
    •  Wilhelm
    •  Wilkin
    •  Wilkinson
    •  Willstatter
    •  Wilson
    •  Wooden
    •  Woods
    •  Woods-Powell
    •  Yacono
    •  Yamane
    •  Yankee
    •  Yarchuk
    •  Yates
    •  Ybarra
    •  Yedidia
    •  Yesson
    •  Yetiv
    •  Yoffe
    •  Youk-See
    •  Zachary
    •  Zahedi
    •  Zangwill
    •  Zegans
    •  Zerbini
    •  Zoldak
    •  Zucconi
    •  Zwiers
    •  Zytowski
    •  alice
    •  andrew
    •  brenda
    •  brent
    •  brian
    •  claudia
    •  daSilva
    •  david
    •  deRousse
    •  debby
    •  del'Enclos
    •  george
    •  helen
    •  james
    •  jerry
    •  jimmy
    •  julie
    •  kevin
    •  l'Enclos
    •  linda
    •  maria
    •  michael
    •  peter
    •  robert
    •  sandra
    •  smith
    •  steve
    •  vanAllen


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: Yana Liu

Discovered: February 09, 2005
Updated: February 13, 2007 12:33:17 PM
Also Known As: Win32.Mydoom.AP [Computer Asso, Email-Worm.Win32.Mydoom.ak [Ka, W32/Mydoom.ba@MM [McAfee], W32/MyDoom-AR [Sophos], WORM_MYDOOM.AR [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. Update the virus definitions.
  3. Restart the computer in Safe mode or VGA mode.
  4. Run a full system scan and delete all the files detected as W32.Mydoom.AS@mm.
  5. Delete the values that the worm adds to the registry.
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:
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. 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: 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 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 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.

Note: If you see an error, such as LU1418, when you try to run LiveUpdate and you cannot get the Web site hosting the Intelligent Updater, it is likely that the worm has modified the Hosts file. You can either download and install LiveUpdate 2.5, which can remove Symantec entries from that file, or you can edit it yourself. See the instructions for both in the "Additional Information" section below.


3. To restart the computer in Safe mode or VGA mode
Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode or VGA mode.
  • For Windows 95, 98, Me, 2000, or XP users, restart the computer in Safe mode. For instructions, read the document, "How to start the computer in Safe Mode."
  • For Windows NT 4 users, restart the computer in VGA mode.


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 as infected with W32.Mydoom.AS@mm, click Delete.

5. Delete the values that the worm adds to 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 keys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

  3. Navigate to the keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  4. In the right pane, delete the value:

    "lsass" = "%System%\lsasrv.exe"

  5. Navigate to the keys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
    HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon

  6. In the right pane, change the value to:

    "Shell" = "explorer.exe"

  7. Navigate to the keys:


    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer

  8. In the right pane, delete the value:

    "ShellSmash"

  9. Exit the Registry Editor.

  10. Restart the computer in Normal Mode.


Writeup By: Yana Liu