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I-Worm.Win32.Yaha.34304

Aliases  I-Worm.Lentin.i(AVP), WORM_YAHA.K(Trend Micro)
Typical Symptoms  Displays message box,Sends email,Process shuts down,Changes Homepage address
Discovered  [korea] 2002-12-27
 [Foreign] 2002-12-24
Type  I-Worm ActiveField  Win32
Destory/Distribution
Origin  India Encryption  NO
Location  None Memory residence  NO
Scan engine needed
2003-01-01 [Able to detect & repair]
  • Free trial download
Description
I-Worm.Win32.Yaha.34304, which was found on 24 Dec 2002, is another variant of I-Worm.Win32.Yaha.

How it spreads

The worm selects mail recipients from the following files or address books:

- .NET messenger user's address book
- Yahoo pager user's address book
- *.ht* files in a local drive
- Windows address book
- MSN massenger user's address book

I-Worm.Win32.Yaha.34304, which was found on 24 Dec 2002, is another variant of I-Worm.Win32.Yaha.

How it spreads

The worm selects mail recipients from the following files or address books:

- .NET messenger user's address book
- Yahoo pager user's address book
- *.ht* files in a local drive
- Windows address book
- MSN massenger user's address book

The worm attempts to send emails by exploiting SMTP addresses that exist in the registry or in the worm itself.

Subject : A mail subject is randomly selected from the following lines.

- Are you the BEST
- Free Win32 API source
- Learn SQL 4 Free
- I Love You..
- Wanna be like a stone ?
- Are you a Soccer Fan ?
- Sexy Screensavers 4 U
- Check it out
- Sample Playboy
- Hardcore Screensavers 4 U
- XXX Screensavers 4 U
- We want peace
- Wanna be a HE-MAN
- Visit us
- One Virus Writer's Story
- One Hacker's Love
- World Tour
- Whats up
- Wanna be my sweetheart ??
- Screensavers from
- Club Jenna
- Jenna 4 U
- Free rAVs Screensavers
- Feel the fragrance of Love Wanna Hack ??
- Sample KOF 2002
- The King of KOF Wanna Brawl ??
- Wanna Rumble ??
- Play KOF 2002 4 Free
- Demo KOF 2002
- Free Demo Game
- Wanna be friends ??
- Need money ??
- Are you beautiful
- Who is your Valentine
- Free Screenavers of Love
- Free XXX
- Free Screensavers
- WWE Screensavers
- Freak Out
- Wanna be friends ?
- Things to note
- Lovers Corner
- Patch for Elkern.gen
- Patch for Klez.H
- Free Screensavers 4 U
- Project
- Sample Screensavers
- Are you in Love
- I am in Love
- I Love You
- You are so sweet
- The Hotmail Hack
- U realy Want this
- to ur lovers
- to ur friends
- Find a good friend
- Learn How To Love
- Are you looking for Love
- Wowwwwwwwwwww check it
- Check ur friends Circle
- The world of Friendship
- Shake it baby
- How sweet this Screen saver
- war Againest Loneliness
- Need a friend?
- Say 'I Like You' To ur friend
- love speaks from the heart
- Let's Dance and forget pains
- Looking for Friendship
- True Love
- make ur friend happy
- Who is ur Best Friend
- hey check it yaar
- Check this shit
- Hello
- Hi


Mail text body : This is randomly selected from the following sentences.

hey,

did u always dreamnt of hacking ur friends hotmail account..
finally i got a hotmail hack from the internet that really works..
ur my best friend thats why sending to u..
check it..just run it..enter victim's address and u will get the pass.

hi, check the attached love screensaver
and feel the fragrance of true love..

Hi,
check the attached screensaver..
its really wonderfool..
i got it from freescreensavers.com

Hi,
check ur friends circle using the attached friendship screensaver..
check the attached screensaver and if u like it send it to all those you consider
to be true friends... if it comes back to you then you will know that you have a

circle of friends..

Hi,
check the attached screensaver
and enjoy the world of friendship..

Hi,
are u in a rocking mood...
check the attached scrennsaver and start shaking..

Hi,
Check the attached screensaver..

Hi,
Are you lonely ??..
check the attached screensaver and
forget the pain of loneliness

Hi,
Looking for online pals..
check the attached friend finder software..

Hi,
sending you a screensaver..
check it and let me know how it is...

Hi,
Check the attached screensaver
and feel the fragrance of true love...

Hey,
I just got this wonderfull screensaver from freescreensaver.com..
Just check it out and let me know how it is..

Hi,
I just came across it.. check out..
=====================================================================
Are you one of those unfortunate human beings who are desperately
looking for friends.. but still not getting true friends with whom
you can share your everything..


anyway you wont feel down any more cause GC Chat Network has brought up a global chat

and online match making system using its own GC Messenger. Attached is the fully

functional free version of GC
Instant Messenger and Match Making client..
Just install, register an account with us and find thousands of online
pals all over the world..
You can also search for friends by specific country,city,region etc.

Regards Admin,
GC Global Chat Network System..

Hi,
So you think you are in love..
is it true love ? you may think right now that you are
in
true love but it is certainly possible that it is nothing
but a mere infatuation to
you..

anyway to know yourself better than you have ever known check
the attached
screensaver and feel the fragrance of true love..

Hey pal,
you know friendship is like a business...
to get something you need to give
something..
though its not that harsh as business but to
get love and care from your friends you need to give
love,care and respect to your friends.. right

check the attached screensaver and you will learn how to
make your friends happy..

Hi,
Its quite obvious that in our life we have numerous friends
but.. BUT Best Friend can only be ONE.. right
so can you decide who is your best friend
i guess not.. cause mostly you will find that your best friend
wont care about u like somebody else..

anyway i found one way to find who is my best friend..
check it..
just check the attached screensaver.. answer some questions
in it and also ask your best friend to answer the questions..

..then you will know more about him..


Hey pal,
wanna have some fun in life...
feel like life is too boring and monotonous..
check the attached screensaver and bring colours
to your black & white life.. :)

Hi,
I just came across this funny screensaver..
sending it to u.. hope u like it..
check out and die laughing.. :)


File attachment : This is randomly selected from the following files.

- The_Best.scr
- Codeproject.scr
- SQL_4_Free.scr
- I_Love_You.scr
- Stone.scr
- Sex.scr
- Soccer.scr
- Real.scr
- Plus6.scr
- Plus2.scr
- Playboy.scr
- Hardcore4Free.scr
- xxx4Free.scr
- Screensavers.scr
- Peace.scr
- Body_Building.scr
- Services.scr
- VXer_The_LoveStory.scr
- Hacker_The_LoveStory.scr
- World_Tour.scr
- up_life.scr
- Sweetheart.scr
- Sexy_Jenna.scr
- Jenna_Jemson.scr
- zDenka.scr
- Ravs.scr
- Free_Love_Screensavers.scr
- Romeo_Juliet.scr
- Hacker.scr
- Fighting.exe
- KOF_Sample.exe
- KOF_Demo.exe
- KOF_The_Game.exe
- KOF2002.exe
- King_of_Figthers.exe
- KOF.exe
- My_Sexy_Pic.scr
- MyProfile.scr
- Ways_To_Earn_Money.exe
- Beautifull.scr
- Valentines_Day.scr
- zXXX_BROWSER.exe
- Britney_Sample.scr
- THEROCK.scr
- FreakOut.exe
- MyPic.scr
- Notes.exe
- Cupid.scr
- FixElkern.com
- FixKlez.com
- Romantic.scr
- Project.exe
- Love.scr
- hotmail_hack.exe
- friendship.scr
- world_of_friendship.scr
- shake.scr
- Sweet.scr
- Be_Happy.scr
- Friend_Finder.exe
- I_Like_You.scr
- love.scr
- dance.scr
- GC_Messenger.exe
- True_Love.scr
- Friend_Happy.scr
- Best_Friend.scr
- life.scr
- colour_of_life.scr
- friendship_funny.scr
- funny.scr


Infection Symptoms

1. The worm creates three files in the Windows system folder:

- Windows system foldertcpsvs32.exe  (34,304 byte)
- Windows system foldernav32_loader.exe (34,304 byte)
- Windows system folderWinServices.exe  (34,304 byte)

2. The worm adds the paths of these files to your registry, setting them to auto-execute themselves when windows start up, or when the infected user logs on to the network.

- HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun

Name : WinServices
Data : (Windows system folder)WinServices.exe
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServices

Name : WinServices
Data : (Windows system folder)WinServices.exe

3. The worm terminates the following processes by force.
(These are mostly related to security programs)

REGEDIT
NAVWNT
VSSTAT
ACKWIN32
NAVRUNR  
VSHWIN32
F-AGNT95
NAVLU32  
AVSYNMGR
NORTON  
IAMSERV.EXE
LOCKDOWN2000
NVC95    
FRW.EXE
AVP.EXE
FP-WIN  
MCAFEE  
CFINET32
IOMON98
ATRACK  
CFINET
PCCWIN98
IAMAPP  
ICMON
F-PROT95
LUCOMSERVER
RMVTRJANSAFEWEB
F-STOPW  
LUALL
WEBSCANX
PVIEW95  
NMAIN
PVIEW
SWEEP95
NAVAPSVC
AVCONSOL
VET95
NISUM
WEBTRAP
N32SCANW
SYMPROXYSVC
POP3TRAP
_AVPM  
RESCUE32
PCCMAIN
LOCKDOWNADVANCED
NISSERV
PCCIOMON
NSPLUGIN
VSECOMR
ESAFE.EXE
NSCHEDNT
VETTRAY
AVPM.EXE
NRESQ32  
TDS2-NT
AVPCC.EXE
NPSSVC  
TDS2-98
AMON.EXE
NOD32    
SCAN32  
ALERTSVC
_AVPCC  
PCFWALLICON
ZONEALARM
_AVP32  
NSCHED32
AVP32
NAVW32  
NAVAPW32
ANTIVIR

4. On a Thursday, the worm changes the default Internet Explorer address to one of the following web sites, and creates certain sentences containing ".TXT" file.

- http://www.unixh(XXXX).com
- http://www.hir(XXX)
- http://www.newor(XXX)
- http://www.ankitfa(XXX)
- http://www.hrvg.(XXXX)
- http://www.hackersclub(XXX)
- http://geocities.com/(XXXX)y3s
- http://www.blacks(XXX)
- http://www.cod(XXX)
- http://www.hack(XXX)

5. On 25 March and 22 May, this virus will display a message box containing the text, "Happy Birthday Dear".

Title : You are my Best Friend
Message : Happy Birthday Dear


Removal Instructions
How to repair

Download ViRobot definition file of 1 Jan 2003 or above to detect/repair (delete or modify your registry).
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