W32.HLLW.Oror.C@mm

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Discovered: January 22, 2003
Updated: February 13, 2007 11:42:30 AM
Also Known As: I-Worm.Roron.4997[KAV]
Type: Worm
Systems Affected: Windows



W32.HLLW.Oror.C@mm is a mass-mailing worm and a variant of W32.HLLW.Oror@mm . This worm attempts to spread using email, mIRC, KaZaA, network shares, and mapped drives. It also attempts to terminate and remove various security products from the infected computer.

This threat is written in the C++ language and is compressed with UPX. The uncompressed size is about 166 KB.

Antivirus Protection Dates

  • Initial Rapid Release version January 23, 2003
  • Latest Rapid Release version August 05, 2017 revision 019
  • Initial Daily Certified version January 23, 2003
  • Latest Daily Certified version August 06, 2017 revision 001
  • Initial Weekly Certified release date January 29, 2003

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

Writeup By: Robert X Wang

Discovered: January 22, 2003
Updated: February 13, 2007 11:42:30 AM
Also Known As: I-Worm.Roron.4997[KAV]
Type: Worm
Systems Affected: Windows


When W32.HLLW.Oror.C@mm is executed, it does the following:

  1. Displays one of the following message:



    or:



    or:



    or



    NOTE: <filename> is variable. This is the full path of the worm that has been executed.
  2. Copies itself to the %Windir% folder and inserts some settings files in the %Windir% and %System% folders. All of these files have fixed file names and may have the Hidden file attribute. The settings files include:
    • %Windir%\Faith.ini
    • %Windir%\<random.filename>.vxd
    • %Windir%\<random.filename>.def
    • %System%\<random.filename>.sys

      NOTES:
    • %Windir% is a variable. The worm locates the Windows installation folder (by default, this is C:\Windows or C:\Winnt) and copies the files to that location.
    • %System% is a variable. The worm locates the System folder and copies the files into 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).
    • The settings files are all text files. They are not viral by themselves, and therefore, Symantec security products do not detect them.
  3. Adds the value:

    <random.valuename>        <Worm.filename> powrprof.dll,LoadCurrentPwrScheme

    to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

    so that the worm runs each time that you start Windows.
  4. Updates the (Default) value of the registry key:

    HKEY_CLASS_ROOT\exefile\shell\open\command

    to:

    <Worm.filename> "%1" %*

    This causes the worm to be executed every time you run the .exe file.
  5. May update the (Default) value of the registry key:

    HKEY_CLASS_ROOT\regfile\shell\open\command

    to:

    <Worm.filename> regedit.exe "%1"

    This causes the worm to be executed every time you execute a .reg file.
  6. Inserts the %System%\Syshook.dll file.
  7. Copies itself to one of the subfolders under C:\Program Files and adds a value, which refers to this copy, to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  8. Copies itself to the %System% folder and inserts the following section in the Win.ini file:

    [windows]
    run=%system%\<Worm.filename>

    so that the worm runs each time you start Windows 95/98/Me.
  9. Watches on the registry key:

    HKEY_CLASS_ROOT\exefile\shell\open\command

    which it previously modified to make sure that the (Default) value continues to refer to the worm. If the default value changed, the worm will attempt to change it back to:

    <Worm.filename> "%1" %*
  10. Watches the %Windir% folder to make sure that the worm continues to exist in that folder. If the worm is deleted, it will attempt to copy itself back to this folder.
  11. Closes all the windows whose title bar contains any of the following strings:
    • black
    • panda
    • shield
    • guard
    • scan
    • mcafee
    • nai_vs_stat
    • iomon
    • navap
    • avp
    • alarm
    • f-prot
    • secure
    • labs
    • antivir
  12. Terminates the processes of and deletes the files whose file name contains any of the following strings:
    • panda
    • avp
    • kaspersky
    • fprot
    • f-prot
    • f-secure
    • antivir
    • conseal
    • lockdown
    • esafe
    • guard
    • mcafee
    • firewall
    • "zone" and "labs"
    • "pc" and "clillin"
    • "black" and "ice"
    • "norton" and "virus"
  13. May attempt to delete all the files from the infected computer, if the worm determines that some of the files that it previously copied to the computer, or if the registry values it added, are missing.
  14. Overwrites some mIRC script files to spread itself through the mIRC network, if mIRC.ini is found on the computer.
  15. Searches the following folders on the mapped drives:
    • Windows
    • Win
    • Win95
    • Win98
    • Winme
    • Dir
  16. If one of the folders described in step 15 is found, the worm attempts to copy itself to that particular folder, and then attempts to update the Win.ini file in the folder. The file name is constructed in the following manner:
    • It uses one of the following strings:
      • PcDudes
      • BritneyUltimate
      • Pamela 3D_
      • Britney Suxx
      • KamaSutra
      • LaFemmeNikita
      • Teen Sex Cam
      • Lolita
      • Pam Anderson Theme
      • Sexy Teens Desktop
      • SexSpy
      • Anal Explorer
      • VirtualRape
      • Hot Blondies
      • Strip Kournikova
    • Followed by one of these strings:
      • (sHow)
      • 3D
      • 3.0
      • (Eng)
      • v4.5
      • (Rated)
    • Followed by the .exe extension.
  17. If the worm does not find one of the folders described in step 15, the worm attempts to copy itself to the root folder of all the mapped drives and create the Hidden file, Autorun.inf, in the root folder of each drive. This causes the worm to be executed every time anyone opens the infected folder.

    NOTE: This worm will attempt to enlarge the file sizes of these copies, so the file sizes will vary.
  18. Copies itself to all the network shared resources. The file name is constructed in the same way as previously described.
  19. If KaZaA is installed on the infected computer, the worm adds the following values:

    DisableSharing             0
    Dir<number>                %windir%\profile

    to the registry key:

    HKEY_CURRENT_USER\Software\Kazaa\LocalContent

    and copies itself to the %Windir%\Profile folder. The file name is constructed in the same way as previously described.
  20. Sends itself to all the email addresses it finds in the incoming messages. The worm will ignore any email address that contains any of the following strings:
    • microsoft
    • msdn
    • mcafee
    • panda
    • norton
    • bullguard
    • kaspersky
    • safe
    • admin
    • master
    • support
    • daemon
    • list
    • subscribe
    • news
    • mailer
    • unsub

      The email message may be random or fixed. This is described in the next section.

Email routine details
The email message may be random or fixed.


Random messages :

Sender : The sender will be one of the following strings:
  • dreamy
  • candy_f
  • bryan16
  • jerry
  • baby_17
  • neo
  • trish1
  • linda1
  • monica
  • nicole
  • angel_f
  • mellany
  • iguana17
  • blade
  • badgirl
  • wizzard
  • blue16
  • tweety
  • alice
  • jane17
  • badboy
  • rap_girl
  • CrazyGirl
  • happy
  • amanda
  • crazy
  • mickey
  • lady_f
  • alex15
  • sunny
  • dave
  • panda_f

and then followed by one of the these:
  • hotmail.com
  • yahoo.com
  • mail.com
  • yahoo.co.uk
  • usa.net
  • europe.com
  • aol.com

Subject : The subject will be one of the following strings:
  • HeY
  • ZzZz
  • Bla Bla
  • HoWie
  • Happy
  • Hi Again
  • Wow
  • Just A Letter
  • Hello
  • Hey Ya
  • Boom
  • Hi There
  • Zdrasti
  • Zdr Otnovo
  • Ohoo
  • Ei
  • Pisamce
  • TinKi WinKy
  • ZzZz
  • Bla Bla
  • Hey
  • Privet
  • Boom
  • HeY
  • ZzZz
  • Bla Bla
  • HoWie
  • Happy
  • Hi Again
  • Wow
  • Just A Letter
  • Hello
  • Hey Ya
  • Boom
  • Hi There

and then followed by one of these:
  • ..
  • !!
  • :)
  • ;))
  • :pP
  • ~pPp
  • :>
  • !
  • ;)


Attachment : The attachment will be one of the following strings:
  • BoxDave_
  • PcDudes
  • Pamela3D_
  • KamaSutra
  • LaFemmeNikita
  • Gipsy
  • Fishfood
  • install_en_
  • Story017_
  • Inter012_
  • Actu002_
  • Chess
  • Angel3D_
  • BabyBlue
  • RedEyez
  • Iguana
  • mTV_Charts_

followed by one of these:
  • (sHow)
  • 3D
  • (Eng)
  • 2.3

and then followed by a .exe or .scr extension.

Fixed messages :
  • Message 1

    Body:
    Zdravei :)) Da ne me zabravi veche :) Ko praish? Za teb neznam noo qko i reshih da ti pisha :) Kolko ti e rekorda na minichkite? Toku shto na Expert razminirah za 2 minuti :))) Ei sq smqtam da si vzema nqkoi qk film i da gledam. Vremeto e super gadno obache taka si izbuhvam poslednite dni, che nqqm dumi :)) Pratih ti iznenadka :) Kefi li te, men mnoo mi haresa :)) Za drugo ne se seshtam tai che chao za sega :)) I da pishesh :pP
  • Message 2

    Subject
    : Blondinki

    Attachment: Blondes.scr

    Body:
    Hey :)) Kak q karash? Pomnish li me oshte :)) Nadqvam se che da. Baq vreme ne sme sa chuvali.. Neshto novo ima li? Namerih edna mnoo qka programka i neznam zashto, no mi napomni za teb :)) Kakvo pravi blondinka kato rodi bliznaci? - Chudi se koi e vtoriq tatko :) Kakva e razlikata mejdu 10 ovce i 3 blondinki? Otgovor: 7 Kak mojesh da razsmeesh blondinka v petak? - Kato i razkajesh vic vav vtornik :) Kefqt li ta vicovete? Shegichka de :) Razkazva vicove na 5 minuti :)) Posmqh se za baq vreme napred :pPpP Haide bye za sega, i da pishesh :))
  • Message 3

    Sender
    : greetings@kefche.com

    Subject: Preotkrii sebe si

    Attachment: Faith.exe

    Body:
    Zdravei, ako si poluchil tova pismo znachi nqkoi priqtel ti go e pratil. Celta na pismoto e da ti pomogne da razberesh koi si vsushnost. Originalnata ideq e na Dalai Lama i tova e nein interaktiven variant. Predi da otvorite test-a si namislete edno jelanie, otgovorete na 5-te vuprosa i sled kato poluchite jelanite otgovori shte poluchite edno chislo. Za da vi se izpulni jelanieto trqbva da pratite tova pismo na tolkova priqteli. Testa se pravi samo vednuj, poneje sled tova nqma da poluchite obektivna ocenka. "Za da navlezem v sveta na drugite, purvo trqbva da budem nqsno sys sebe si" - Dalai Lama. P.S. Tozi test e samo za lichna upotreba, i ne biva da bude izpolzvan za kakvito i da bili komersialni celi.
  • Message 4

    Sender
    : support@kefche.com

    Subject: Kefche.com_

    Body:
    Ekiput na Kefche.com ima radostta da pozdravi vsichki fenove na Kefcheto s 1-ta godishnina ot puskaneto na site-a. Nie se prevurnahme v nai-dobriq i poseshtavan bg site za zabavleniq i igri. Ot samoto si nachalo Kefche.com ima za cel da vi nosi samo i edinstveno smqh i zabava, nadqvame se che sme postignali celite si :)) Po sluchai godishninata, ekiput ni poe iniciativata da izprashta vsqka sedmica nai-dobrite flash-cheta i igrichki na vsichki user-i poseshtavashti Kefche-to. Nadqvame se da vi haresa i tova da bude samo nachaloto na edno novo zabavlenie :))
    -----------------
    Kefche.com Team.
  • Message 5

    Sender
    : greetings@reply.yahoo.com

    Subject: <username> sent you a Yahoo! Greeting_

    Attachment: Yahoo!Winter.exe

    Body:
    Surprise! You've just received a Yahoo! Greeting from "<username>" (<useremail>)! This is an interactive greeting card and requires Flash Media Player. Enjoy! The Yahoo! Greetings Team.
    --------------------------
    Yahoo! Greetings is a free service. If you'd like to send someone a Yahoo! Greeting, you can do so at http://greetings.yahoo.com
  • Message 6

    Attachment
    : Blondes.scr

    Body:
    Hey, what's up :)) Where are you? Don't you chat any more?  I haven't seen you so long. I sent you a surprise, read this :))
    - What do blondes wear behind  their ears to attract men? Their ankles!!  
    - Why did god invent the female orgasm? So blondes know when to stop screwing!!
    - What is a blond with hair black colored? Artificial intelligence!
    Blondes forever!! :) Time off, i must go now, but i'll be very happy if you write to me soon :) Bye bye :))
  • Message 7

    Sender
    : greetings@e-cards.com

    Subject: Explore your soul

    Attachment: Faith.exe

    Body:
    Hello, if you are reading this letter, it means that a friend of yours has sent it to you. The idea is to help you realize who you are indeed. This is an interactive variant, based on the original tests of Dhalai Lama, a great indian philosopher. Before you open the test, you should make a wish. Answer to the 5 questions honestly, after that you will recieve a number. If you want your wish to come true you must send this letter to that count of your friends. You can make the test only once, because after that the results won't be real. "If you want to enter the other's world, you should explore your soul first" - Dhalai Lama.
    P.S. This test is for personal use only, and should not be used with commercial purposes.
  • Message 8

    Sender
    : support@miamigirls.com

    Subject: MiamiGirls.com Free Subscription

    Attachment: FreeTour.scr

    Body:
    On the occasion of it's 3th anniversary MiamiGirls.com wants to offer you even more pleasure than before. There are several new promotions and if you are interested you can watch the free demo and subsequently contact our web page. If you join now, the first month of your membership will be free. Thousands of hot teen pics and videos are available for you. Image Galleries, Cumshots, LiveCams, Hot Video Chat, Erotic Stories, XXX Lessons, Kama Sutra, celebrities.. We provide the best services for our members. This site contains adult material that is unsuitable for those under the age of 18.
    ------------------------
    www.MiamiGirls.com
  • Message 9

    Sender
    : support@games.yahoo.com

    Subject: Yahoo! Games_

    Attachment: Yahoo!Baseball.exe

    Body:
    Yahoo! Team is proud to present our new surprise for the clients of Yahoo! and Yahoo! Mail. We plan to send you the best Yahoo! Games weekly. This new service is free and it's a gift for the 10th anniversary of Yahoo!. We hope you would like it. The whole Yahoo! Team wants to express our gratitude to you, the people who helped us to improve Yahoo! so much,  that it became the most popular worldwide portal. Thank You! We do our best to serve you.
    ------------------
    Yahoo! Team.
    www.Yahoo.com
  • Message 10

    Sender
    : greetings@reply.yahoo.com

    Subject: <username> sent you a Yahoo! Greeting_

    Attachment: Yahoo!Christmas.exe

    Body:
    Surprise! You've just received a Yahoo! Greeting from "<username>" (<useremail>)! This is an interactive greeting card and requires Flash Media Player. Enjoy! The Yahoo! Greetings Team.
    --------------------------
    Yahoo! Greetings is a free service. If you'd like to send someone a Yahoo! Greeting, you can do so at http:/ /greetings.yahoo.com


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: January 22, 2003
Updated: February 13, 2007 11:42:30 AM
Also Known As: I-Worm.Roron.4997[KAV]
Type: Worm
Systems Affected: Windows


These instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

  1. Re-install the Symantec antivirus product files, if the worm deleted them.
  2. Update the virus definitions.
  3. Run a full system scan, record the file names, and then delete all the files detected as W32.HLLW.Oror.C@mm.
  4. Reverse the changes that the worm made to the registry.
  5. Windows 95/98/Me only: Remove the text that the worm added to the Win.ini file.

For specific details on each of these procedures, read the following instructions.

1. Re-installing the antivirus software
Attempt to start your Symantec antivirus software, such as Norton AntiVirus.
  • If it starts as expected and appears to be working correctly, skip to step 2.
  • If it does not start, or if it does not function correctly, re-install it from the original installation CD or downloaded files.

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 the 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), in the "Protection" section, at the top of this writeup.
  • 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), in the "Protection" section, at the top of this writeup.

    The Intelligent Updater virus definitions are available here. For detailed instructions on how to download and install the Intelligent Updater virus definitions from the Symantec Security Response Web site, click here.

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.Oror.C@mm, write down the file names, and then click Delete.

4. Reversing the changes made to the registry

CAUTION : Symantec strongly recommends that you back up the registry before you make 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, and then click OK. (The Registry Editor opens.)
  3. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
  4. In the right pane, delete all the values that refer to the worm.
  5. Navigate to the key

    HKEY_CLASS_ROOT\regfile\shell\open\command
  6. In the right pane, change the (Default) value to:

    regedit.exe "%1"
  7. Navigate to the key

    HKEY_CLASS_ROOT\exefile\shell\open\command
  8. In the right pane, change the (Default) value to:

    "%1" %*
  9. Exit the Registry Editor.

5. Removing the text from the Windows 95/98/Me Win.ini file

Note for Windows Me users only: Due to the file-protection process in Windows Me, a backup copy of Win.ini exists in the C:\Windows\Recent folder. Symantec recommends that you delete this file before you continue with the steps in this section. To do this using Windows Explorer, go to C:\Windows\Recent, and in the right pane select the Win.ini file and delete it. The Win.ini file will be recreated in C:\Windows\Recent when you save your changes to Win.ini in C:\Windows.
  1. Click Start, and then click Run.
  2. Type the following, and then click OK.

    edit c:\windows\win.ini

    (The MS-DOS Editor opens.)

    NOTE: If Windows is installed in a different location, make the appropriate path substitution.
  3. In the [windows] section of the file, look for an entry similar to:

    run=%system%\<Worm.filename>
  4. If this line exists, select its entirety. Be sure that you do not select any other text, and then press Delete.
  5. Click File, and then click Save.
  6. Click File, and then click Exit.


Writeup By: Robert X Wang