Win32/Yaha [Threat Name] go to Threat

Win32/Yaha.N [Threat Variant Name]

Category	worm
Size	34304 B
Aliases	Email-Worm.Win32.Lentin.i (Kaspersky)
	W32.Yaha.K@mm (Symantec)
	W32/Yaha.k@MM (McAfee)

Short description

Win32/Yaha.N is a worm that spreads via e-mail. The file is run-time compressed using UPX . The worm terminates various security related applications.

Installation

When executed, the worm copies itself into the folder:

%system%

with the following file names:

WinServices.exe
nav32_loader.exe
tcpsvs32.exe

In order to be executed on every system start, the worm sets the following Registry entries:

[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run]
- "WinServices" = "%system%\WinServices.exe"
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices]
- "WinServices" = "%system%\WinServices.exe"
[HKEY_LOCAL_MACHINE\Software\Classes\exefile\shell\open\command]
- "(Default)" = ""%system%\nav32_loader.exe""%1"%*"

Spreading via e-mail

E-mail addresses for further spreading are searched for in local files with one of the following extensions:

.*ht*
.*HoTMAil*

Also the e-mail addresses are searched for in the following program(s):

MSN Messenger
Yahoo Pager

The worm uses the addresses found in Windows Address Book, too.

Subject of the message is one of the following:

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
Hi
Hello
Check this shit
hey check it yaar
Who is ur Best Friend
make ur friend happy
True Love
Looking for Friendship
Let's Dance and forget pains
love speaks from the heart
Say 'I Like You' To ur friend
Need a friend?
war Againest Loneliness
How sweet this Screen saver
love speaks from the heart
Shake it baby
The world of Friendship
Check ur friends Circle
Wowwwwwwwwwww check it
Are you looking for Love
Learn How To Love
Find a good friend
to ur friends
to ur lovers
U realy Want this
The Hotmail Hack
You are so sweet
I Love You
One Hacker's Love
I am in Love
Are you in Love

Body of the message is one of the following:

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.. checkit 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{BR> 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 {BR>so can you decide who is your best friend {BR>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... {BR>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.. :) <<<<<>>>>><<<<<>>>>><<<<<>>>>><<<<<>>>>><<<<<>>>>><<<<<>>>>> This E-Mail is never sent unsolicited. If you receive this E-Mail then it is because you have subscribed to the official newsletter at the KOF ONLINE website. King Of Fighters is one of the greatest action game ever made. Now after the mind boggling sucess of KOF 2001 SNK proudly presents to you KOF 2002 with 4 new charecters. Even though we need no publicity for our product but this time we have decided to give away a fully functional trial version of KOF 2002. So check out the attached trial version of KOF 2002 and register at our official website to get a free copy of KOF2002 original version Best Regards, Admin,KOF ONLINE.. <<<<<>>>>><<<<<>>>>><<<<<>>>>><<<<<>>>>><<<<<>>>>><<<<<>>>>> Hello, I just came across your email ID while searching in the Yahoo profiles. Actually I want a true friend 4 life with whom I can share my everything. So if you areinterested in being my friend 4 life then mail me. If you wanna know about me, attached is my profile along with some of my pics. You can check and if you like it then do mail me. I will be waiting for your mail. Best Wishes, Your Friend.. Hello, Looking for some Hardcore mind boggling action ? Install the attached browser software and browse across millions of paid hardcore sex sites for free. Using the software you can safely and easily browse across most of the hardcore XXX paid sites across the internet for free. Using it you can also clean all traces of your web browsing from your computer. Note:The attached browser software is made exclusivley for demo only. You can use the software for a limited time of 35 days after which you have to register it at our official website for its furthur use. Regards, Admin. Klez.H is the most common world-wide spreading worm.It's very dangerous by corrupting your files. Because of its very smart stealth and anti-anti-virus technic,most common AV software can't detect or clean it. We developed this free immunity tool to defeat the malicious virus. You only need to run this tool once,and then Klez will never come into your PC Hello, The attached product is send as a part of our official campaign for the popularity of our product. You have been chosen to try a free fully functional sample of our product.If you are satifiedthen you can send it to your friends. All you have to do is to install the software and register an account with us using the links provided in the software. Then send this software to your friends using your account ID and for each person who registers with us through your account, we will pay you $1.5.Once your account reaches the limit of $50, your payment will be send to your registration address by check or draft. Please note that the registration process is completely free which means by participating in this program you will only gain without loosing anything. Best Regards, Admin,

The attachment is an executable of the worm.

Its filename is one of the following:

The_Best.scr
Codeproject.scr
SQL_4_Free.scr
I_Love_You.scr
Stone.scr
Sex.scrSoccer.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
KOF_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

The sender address is one of the following:

kl@aminoprojects.com
admin@codeproject.com
free@sql.library.com
me@me2K.com
stone@esterplaza.com
marketing@suppersoccer.com
free@sexyscreensavers.com
sales@real.com
plus@real.com
sales@playboy.com
free@hardcorescreensavers.com
free@xxxscreensavers.com
kkn@k2k.comscreensavers@nomadic.com
nics@nomadic.com
paul@kqscore.com
btq@263.com
services@tcsonline.com
admin@clubjenna.com
jenna@jennajameson.com
zdenka@zpornstars.com
ravs@go2pussy.com
love@lovescreensavers.com
DNA_seraph@163.com
super@21cn.com
cathy@21cn.com
admin@kofonline.com
zhouyuye@citiz.net
lubing@7135.com
hamada@seikosangyo.com
luoairong@21cn.com
valentinescreensavers@t2k.com
screensavers@lovers.com
admin@zpornstars.com
newsletters@britneyspears.org
therock@wwe.com
ericpan@online.com.pk
samsun@online.sh.cn
yjworks@online.sh.cn
cupid@freescreensavers.com
av_patch@mcafee.com
av_patch@norton.com
av_patch@trendmicro.com
romanticscreensavers@love.com
caijob@online.sh.cn
loverscreensavers@love.com
Klein Anderson
Codeproject
SQL Library
me2K
Rocking Stone
Super Soccer
Sexy Screensavers
Real Inc.
Plus 6
Plus 2
Playboy Inc.
Hardcore Screensavers
XXX Screensavers
Nomadic Screensavers
Keanu Stevenson
Nicolas Schwarzeneggar
admin@hackersclub.com
admin@viruswriters.com
admin@hackers.com
Paul Owen
Benting
Veronica Anderson
Club Jenna
Jenna Jameson
Zdenka Podkapova
Raveena Pusanova
Screensavers of Love
Romeo & Juliet
Jaucques Antonio Barkinstein
Cathy Kindergarten
KOF Online
Omega Rugal
Terry Bogard
Iori Yagami
Kyo Kusanagi
Clark Steel
Ralph Jones
Jasmine Stevens
Ross Anderson
John Vandervochich
American Beauty
Valentine Screensavers
Lovers Screensavers
zporNstarS
britneyspears.org
The Rock
Noopma
Susan
Jonathan
Cupid
McAfee Inc.
Norton Antivirus
Trend Micro
Romantic Screensavers
Jericho
Love Inc.

Other information

The worm terminates processes with any of the following strings in the name:

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

The worm may create the text file:

%desktop%\aYerHS.txt

The file may contain some of the following (5) texts:

================================================== W32.@YerH$.B,Made in India wE aRe thE greAt iNdIaNs.. ---------------------------- aBouT mE : jUst a c0mputEr gEEk.. i tHinK i aM sTill a sCripT kiddiE.. eDucAtiOn : sCh00l sTudEnt.. aBouT @YerH$.B: n0 dEstrucTivE paYload$ f0r inFecTeD c0mpUteRs. teRminAtioN oF aV + FireWaLL f0r sUrvIvaL. tImE dEfiNed tRigErRinG.. jUst f0r fUn.. n0 paYloaD. c0ntAinS bUg iN rEpliCation c0de.. no tIme t0 fiX. g0nNa fiX iT iN nExt rElEase.. n0 m0rE $hiT =================================================== >> qph@hackermail.com ================================================== W32.@YerH$.B,Made in India, wE aRe thE greAt iNdIaNs.. ---------------------------- spEciAl 10x to c0bra.. f0r inSpirAtIon + c0dIng hElp.. ================================================== >> qph@hackermail.com ====================================================== W32.@YerH$.B,Made in India wE aRe thE greAt iNdIaNs.. ---------------------------- wAnT peAce aNd pr0speRity in InDiA ?.. f**k tHe c0rruptEd p0litiCian$..no shit$ nEEdeD.. mErA bhAraT mAhaN ??.. n0t yeT..wE nEEd t0 mAkE iT.. talenT & hArd w0rK shOulD be rEspEctEd.. sElf stYleD a**H***$ mUsT bE eLimInatEd.... n0 m0re $hiT m0n0p0lY.. ====================================================== >> qph@hackermail.com ================================================= W32.@YerH$.B,Made in India. wE aRe thE greAt iNdiAnS. ---------------------------- iNdiAn hAckeRs + vXerS teAm up... aNd kicK lamEr a** no m0re pAk shIT.. itZ oUr tiMe to shOw tHem, the p0wer of teaM w0rk. f**k AIC,GFORCE,SILVERLORDS,WFD..f*****g k1dd1es.. no sHit bUsineSS iN heRe aNd nO lamE stuFF.. ================================================= >> qph@hackermail.com ============================================================ r0xx pReSaNt$ W32.@YerH$.B (all r1ght$ re$erv3d.. ;) ) w3 aRe tHe gRe@t 1nD1aN$.. ------------------------------------------------------ m@iN mIssIoN iS t0 sPreAd tHe nAmE @YerH$ s00 mUch t0 c0me.. NclUdEd DDoS c0mp0neNtS c@usE oF sHiT p@kI l@meRs eXp3ct th3 uNeXp3ctEd dEdic@t3d t0 : mY b3$t fRi3nD ============================================================ >> qph@hackermail.com

The worm may create copies of itself in the folder:

%system%

The following filename is used:

love.scr
hotmail_hack.exe
funny.scr
friendship.scr
world_of_friendship.scr
shake.scr
Love.scr
Sweet.scr
Be_Happy.scr
Friend_Finder.exe
I_Like_You.scr
dance.scr
GC_Messenger.exe
True_Love.scr
Friend_Happy.scr
Best_Friend.scr life.scr
life.scr
colour_of_life.scr
friendship_funny.scr

The worm may set the following Registry entries:

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
- "Start Page" = "%variable%"

The %variable% is one of the following strings:

http://geocities.com/snak33y3s
http://www.hackersclub.up.to
http://www.hrvg.tk
http://www.ankitfadia.com
http://www.hackers.com/html/neohaven.html
http://www.coderz.net
http://www.blacksun.box.sk
http://www.neworder.box.sk
http://www.hirosh.tk
http://www.unixhideout.com

The worm may attempt to perform a DoS attack on the following server(s):

infopak.gov.pk

The worm may display the following message:

Happy Birthday Dear