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ウイルス情報
ウイルス名危険度
W32/Yaha.k@MM
企業ユーザ:
個人ユーザ:
ファイルサイズ
最小定義ファイル
(最初に検出を確認したバージョン)
4239
対応定義ファイル
(現在必要とされるバージョン)
4309 (現在7544)
対応エンジン5.1.00以降 (現在5600) 
エンジンバージョンの見分け方
情報掲載日02/12/24
発見日(米国日付)02/12/21
駆除補足ウイルス駆除のヒント
概要ウイルスの特徴感染症状感染方法駆除方法
セキュリティ情報

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駆除方法
概要TOPに戻る

ウイルスの特徴TOPに戻る

・12月30日更新情報

感染が増加してきているため、危険度を「中」に上げました。

・12月23日更新情報

メディアによる注目が集まっているため、危険度を「低:要注意」に上げました。

・W32/Yaha.k@MMは、内蔵されたSMTPエンジンを使用して電子メールで繁殖します。このウイルスは特定のプロセス(ウイルス対策、セキュリティ関連)が実行中の場合はそれを終了させ、リモートマシン(ターゲットマシンがウイルスにハードコード化されている)に対してサービス拒否攻撃を仕掛けるコードを含んでいます。

・テストでは大量メール送信ルーチンは行われませんでした。しかしウイルス内部の文字列より、このウイルスは以下のフォーマットの電子メールメッセージの添付ファイルで届くと考えられます。

件名:(以下のいずれか)

●Are you a Soccer Fan ?
●Are you beautiful
●Are you the BEST
●Check it out
●Demo KOF 2002
●Feel the fragrance of Love
●Freak Out
●Free Demo Game
●Free rAVs Screensavers
●Free Screenavers of Love
●Free Screensavers
●Free Screensavers 4 U
●Free Win32 API source
●Free XXX
●Hardcore Screensavers 4 U
●I Love You..
●Jenna 4 U
●Learn SQL 4 Free
●Lovers Corner
●Need money ??
●One Hacker's Love
●One Virus Writer's Story
●Patch for Elkern.gen
●Patch for Klez.H
●Play KOF 2002 4 Free
●Project Sample Screensavers
●Sample KOF 2002
●Sample Playboy
●Screensavers from Club Jenna
●Sexy Screensavers 4 U
●The King of KOF Wanna Brawl ??
●Things to note
●Visit us
●Wanna be a HE-MAN
●Wanna be friends ?
●Wanna be friends ?
●Wanna be like a stone ?
●Wanna be my sweetheart ??
●Wanna Hack ??
●Wanna Rumble ??
●We want peace
●Whats up
●Who is your Valentine
●World Tour
●WWE Screensavers
●XXX Screensavers 4 U

添付ファイル:(以下のファイル名のいずれか)

●Beautifull.scr
●Body_Building.scr
●Britney_Sample.scr
●Codeproject.scr
●Cupid.scr
●FixElkern.com
●FixKlez.com
●FreakOut.exe
●Free_Love_Screensavers.scr
●Hacker.scr
●Hacker_The_LoveStory.scr
●Hardcore4Free.scr
●I_Love_You.scr
●Jenna_Jemson.scr
●King_of_Figthers.exe
●KOF.exe
●KOF_Demo.exe
●KOF_Fighting.exe
●KOF_Sample.exe
●KOF_The_Game.exe
●KOF2002.exe
●Love.scr
●My_Sexy_Pic.scr
●MyPic.scr
●MyProfile.scr
●Notes.exe
●Peace.scr
●Playboy.scr
●Plus2.scr
●Plus6.scr
●Project.exe
●Ravs.scr
●Real.scr
●Romantic.scr
●Romeo_Juliet.scr
●Screensavers.scr
●Services.scr
●Sex.scrSoccer.scr
●Sexy_Jenna.scr
●SQL_4_Free.scr
●Stone.scr
●Sweetheart.scr
●The_Best.scr
●THEROCK.scr
●up_life.scr
●Valentines_Day.scr
●VXer_The_LoveStory.scr

Ways_To_Earn_Money.exe
●World_Tour.scr
●xxx4Free.scr
●zDenka.scr
●zXXX_BROWSER.exe

本文:ウイルス内部の文字列によると、さまざまな種類の本文があるようです。(本文と添付ファイル名は同時に選択されます)

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 oneof 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 toget 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,

・このウイルスは、以下の文字列を含んでいます(これまで発見されたYaha亜種の文字列に似ています)。

?teRminAtioN oF aV + FireWaLL f0r sUrvIvaL.
?tImE dEfiNed tRigErRinG.. jUst f0r fUn.. n0 paYloaD.
?c0ntAinS bUg iN rEpliCation c0de.. no tIme t0 fiX.

以下の症状が見られる場合、このウイルスに感染している可能性があります。TOPへ戻る

・Windows Systemディレクトリ(例:C:\WINDOWS\SYSTEM)に、以下のファイル名で自身のコピーを複数作成する。
●NAV32_LOADER.EXE
●TCPSVS32.EXE
●WINSERVICES.EXE

・以下のレジストリキーを追加して、システムの起動をフックする。

●HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run"WinServices"= C:\WINDOWS\SYSTEM\WinServices.exe

●HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices"WinServices" = C:\WINDOWS\SYSTEM\WinServices.exe

・システム起動に続いて実行される実行ファイルを次のレジストリキーを改変してフックする。

●HKEY_CLASSES_ROOT\exefile\shell\open\command "(デフォルト)"("%1" %*から"C:\WINDOWS\SYSTEM\nav32_loader.exe""%1"%*へ改変する)

・Windows NT/2000システム上のテストでは、ウイルスはWindows Systemディレクトリに以下のファイル名で自身のコピーを複数作成した。

●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

・以下のプロセスを終了させる(終了させるプロセスのリストは、ウイルス内部にハードコード化されている)。

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

感染方法TOPへ戻る

・感染システム上でウイルスが実行されると自身をインストールし、(ウイルス対策、セキュリティ製品関連の)さまざまなプロセスを終了させる。

駆除方法TOPへ戻る