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ウイルス情報| ウイルス名 | 危険度 | | W32/Yaha.af@MM | 企業ユーザ: 低[要注意] 個人ユーザ: 低[要注意] |
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| ウイルスの特徴 | TOPに戻る | |
--2003年12月10日更新情報--
・W32/Yaha.af@MMは、以下のメディアの注目を集めたため、危険度を"低〔要注意〕"にしました。http://www.pcpro.co.uk/news/news_story.php?id=51260
・W32/Yaha.af@MMは、定義ファイル4295を使用して圧縮実行ファイルをスキャンすると、総称で検出されます。
・W32/Yaha.af@MMは電子メール、Windowsファイル共有およびKaZaaを介して繁殖します。W32/Yaha.af@MMには、キーロガーとサービス拒否(DoS)発病ルーチンが含まれています。
・W32/Yaha.af@MMは、多数のさまざまな件名、本文、添付ファイル名を使用する電子メールを介して繁殖します。
送信者:
Microsoft Support support@microsoft.com
件名:
Critical Updates rs
添付ファイル:
MS-Q3526.com
本文:
Dear Customer,
Thanks for using Microsoft products. Recent viruses have prompted micrsoft to issue patches to all its customers worldwide.
We are including a comprehensive patch for all windows platforms. This patch gives you comprehensive protection against all recent viruses.
Yours sincerely,
JimThompson
Team Support
Microsoft Inc
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送信者:
Symantec Support support@symantec.com
件名:
Fix for W32.Blaster/Welcha
添付ファイル:
FixBlast.com or FixBlast.zip
本文:
Dear customer,
We are enclosing Fix for both Welcha and Blaster worms as per your request.
Step by Step Instructions for Cleaning W32.Blaster/W32.Welcha Worms:
1. Save the file to a convenient location, such as your downloads folder or the Windows Desktop
(or removable media that is known to be uninfected, if possible).
2. To check the authenticity of the digital signature, refer to the section, "Digital signature."
3. Close all the running programs before running the tool.
4. If you are running Windows XP, then disable System Restore.
Refer to the section, "System Restore option in Windows Me/XP," for additional details.
In case of any clarifications please do not hesitate to contact us.
Best Regards,
Neil Thomas
Symantec Support
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送信者:
Mcafee Support support@nai.com
件名:
Fix for the latest W32/Blaster.Z
添付ファイル:
Fixblastz.com or FixBlastz.zip
本文:
Dear customer,
We are enclosing Fix for W32.Blaster.Z as per your request.
Step by Step Instructions for Cleaning W32.Blaster.Z
1. Save the file to a convenient location, such as your downloads folder or the Windows Desktop
(or removable media that is known to be uninfected, if possible).
2. To check the authenticity of the digital signature, refer to the section, "Digital signature."
3. Close all the running programs before running the tool.
4. If you are running Windows XP, then disable System Restore.
Refer to the section, "System Restore option in Windows Me/XP," for additional details.
In case of any clarifications please do not hesitate to contact us.
Best Regards,
Jerry Nelson
McAfee Support
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件名:
Fw: Critical Patches
添付ファイル:
MS-Q3946.EXE
本文:
Hi,
I got this mail from Microsot support. Atlast Microsoft has got a comprehensive patch
for all the vulnerabilities. Once this patch is applied, it takes care of all the recent virus problems
in Microsoft products.
Later....
Microsoft support wrote:
>Thanks for using Microsoft products. Recent viruses have prompted micrsoft to issue patches
>to all its customers worldwide.
>
>We are including a comprehensive patch for all windows platforms. This patch gives you
>comprehensive protection against all recent viruses.
>
>Yours sincerely,
>Kelly
>Team Support
>Microsoft Inc
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件名:
Hi check your computer with this!!!
添付ファイル:
FixBlast.com
本文:
Hi,
I am cutting and pasting the message i got from symantec antivirus
I think the last mail you sent me was infected with W32.Blaster. please
use this tool and disinfect your machine.
Bye,
Dear customer,
We are enclosing Fix for both Welcha and Blaster worms as per your request.
Step by Step Instructions for Cleaning W32.Blaster/W32.Welcha Worms:
1. Save the file to a convenient location, such as your downloads folder or the Windows Desktop
2. To check the authenticity of the digital signature, refer to the section, "Digital signature."
3. Close all the running programs before running the tool.
4. If you are running Windows XP, then disable System Restore.
In case of any clarifications please do not hesitate to contact us.
Best Regards,
Neil Thomas
Symantec Support
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件名:
Your previous message is infected
添付ファイル:
FixBlast.com
本文:
Hi,
Your previous mail to me is infected with Blaster.
I am attaching the tool i got from symantec site please clean your machine with the same.
Best Rgds,
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件名:
Fix for New Worm Threat
添付ファイル:
FixBlastz.com
本文:
Hi,
I got this mail from Mcafee Antivirus Support. There is a new variant of W32.Blaster worm.
I got a special fix today in the early hours, please check your machine with the attached tool.
I have also cut and pasted the steps for cleaning.
Rgds
Dear customer,
We are enclosing Fix for W32.Blaster.Z as per your request.
Step by Step Instructions for Cleaning W32.Blaster.Z
1. Save the file to a convenient location, such as your downloads folder or the Windows Desktop
2. To check the authenticity of the digital signature, refer to the section, "Digital signature."
3. Close all the running programs before running the tool.
4. If you are running Windows XP, then disable System Restore.
In case of any clarifications please do not hesitate to contact us.
Best Regards,
Jerry Nelson
McAfee Support
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送信者:
Microsoft Support support@microsoft.com
件名:
Critical Patches
添付ファイル:
MS-Q31338.ZIP
本文:
Dear Customer,
Thanks for using Microsoft products. Recent viruses have prompted micrsoft to issue patches
to all its customers worldwide.
We are including a comprehensive patch for all windows platforms. This patch gives you
comprehensive protection against all recent viruses.
Yours sincerely,
JimThompson
Team Support
Microsoft Inc
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送信者:
System Administrator admin@kpmg.com
件名:
Fix for recent viruses
添付ファイル:
FIXES.ZIP
本文:
Hi All,
I am sending these fixes to the recent viruses which have been making rounds in the IT world.
I request you to install the same in your systems and pass it to others.
Yours sincerely,
James
System Administrator
KPMG
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件名:
Your details
添付ファイル:
Requirement.zip
本文:
Hi,
We have your email id in our database. We have enclosed our requirements.
Expecting your reply at the earliest.
Kind Rgds,
James Martin
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送信者:
Support eEye support@eeye.com
件名:
Microsoft RPC still vulnerable - Latest worm
添付ファイル:
RPCDCOM.ZIP or PATCHRPC.COM
本文:
Microsoft RPC Heap Corruption Vulnerability - Part II
Severity:
High (Remote Code Execution).
Description:
eEye Digital Security has discovered a critical remote vulnerability in the way Microsoft
Windows handles certain RPC requests.The RPC (Remote Procedure Call) protocol provides
an inter-process communication mechanism allowing a program running on one computer to
execute code on a remote system. The vulnerability
exists within the DCOM (Distributed Component Object Model) RPC interface.
This interface handles DCOM object activation requests sent by client machines to the server.
By sending a malformed request packet it is possible to overwrite various heap structures and
allow the execution of arbitrary code.
please install the attached patch immediately.
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件名:
Details
添付ファイル:
details.zip or details.pif
本文:
Hi,
See the attached file for details.
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件名:
Thank you
添付ファイル:
thankyou.zip or thankyou.pif
本文:
Please see the attached file for details
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件名:
Your document
添付ファイル:
your_documents.zip or your_documents.pif
本文:
See the attached file for your documents
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件名:
Your application
添付ファイル:
application.zip
本文: Please see the attached file for applicaion details.
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件名:
Wicked Screen Saver
添付ファイル:
wicked.zip or wickedsaver.scr
本文:
Hi,
This is the most wicked screen saver i have ever seen.Enjoy!!!
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件名:
Naughty Movie Clip
添付ファイル:
movie3498.zip or naughty.pif
本文:
Hi,
This is an interesting movie clip. You will enjoy it.
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件名:
Hi check your computer with this!!!
添付ファイル:
FixBlast.zip or FixBlast.com
本文:
Hi,
I am cutting and pasting the message i got from symantec antivirus
I think the last mail you sent me was infected with W32.Blaster. please
use this tool and disinfect your machine.
Bye,
Dear customer,
We are enclosing Fix for both Welcha and Blaster worms as per your request.
Step by Step Instructions for Cleaning W32.Blaster/W32.Welcha Worms:
1. Save the file to a convenient location, such as your downloads folder or the Windows Desktop
2. To check the authenticity of the digital signature, refer to the section, "Digital signature."
3. Close all the running programs before running the tool.
4. If you are running Windows XP, then disable System Restore.
In case of any clarifications please do not hesitate to contact us.
Best Regards,
Neil Thomas
Symantec Support
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・添付ファイルが実行されると、ウイルスは自身をMSMGR32.EXEとEXE32.EXEというファイル名で、WINDOWS SYSTEMディレクトリにコピーします。以下のレジストリ実行キーが作成され、起動時に自身を読み込みます。
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "MsManager" = C:\WINNT\System32\MSMGR32.EXE
・他の実行ファイルが実行されるたびに以下のキーがフックされ、自身を読み込みます。
- HKEY_CLASSES_ROOT\batfile\shell\open\command
"(Default)" = "C:\WINNT\System32\EXE32.EXE""%1"%*
- HKEY_CLASSES_ROOT\comfile\shell\open\command
"(Default)" = "C:\WINNT\System32\EXE32.EXE""%1"*
- HKEY_CLASSES_ROOT\exefile\shell\open\command
"(Default)" = "C:\WINNT\System32\EXE32.EXE""%1"%*
- HKEY_CLASSES_ROOT\scrfile\shell\open\command
"(Default)" = "C:\WINNT\System32\EXE32.EXE""%1"%*
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| 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 | |
| 感染方法 | TOPへ戻る | |
電子メールを介した繁殖
・W32/Yaha.af@MMは、自身のSMTPエンジンを使用して感染したシステムからメッセージを送信します。
・この情報掲載時点ではAVERTによるテストで電子メールの送信は観察されませんでしたが、W32/Yaha.af@MM内の文字列を見ると、以下で発見されるすべての電子メールアドレスに自身を電子メールで送信すると考えられます。
- Windowsのアドレス帳
- MSN Messenger
- .NET Messenger
- ICQ Pager
- Yahoo Pager
- *.HT*に一致するファイルから入手したアドレス
・これまでに発見されたW32/Yahaの亜種と同様に、W32/Yaha.af@MM内の文字列からアドレスが偽造されることが考えられます。
ネットワーク共有を介した繁殖
・W32/Yaha.af@MMは、リモート共有上にある特定のフォルダ(ワームにハードコード化されている)のWIN.INIファイルを検索します。WIN.INIファイルが存在する場合は、該当するフォルダにMCCP32.EXEというファイル名で自身をコピーし、WIN.INIファイルに以下のフックを追加します。
・以下のフォルダを検索します。
- \WINDOWS\WIN.INI
- \WIN98\WIN.INI
- \WIN95\WIN.INI
- \WINNT\WIN.INI
- \WIN\WIN.INI
- \WINME\WIN.INI
- \WINXP\WIN.INI
・さらに、W32/Yaha.af@MMはリモートネットワークドライブの以下のフォルダも検索します。
- \DOCUMENTS AND SETTINGS\ALL USERS\START MENU\PROGRAMS\STARTUP
KaZaaを介した繁殖
・W32/Yaha.af@MMはレジストリからデフォルトのダウンロードディレクトリを取得し、そのディレクトリにすでに存在するファイルと入れ替わります。
ドメインの遮断
・WindowsフォルダにあるHOSTSとLMHOSTSファイルを改変し、ユーザが以下のWebサイトにアクセスできないようにします。
- www.symantec.com
- www.microsoft.com
- www.sophos.com
- www.avp.ch
- www.mcafee.com
- www.trendmicro.com
- www.pandasoftware.com
- www3.ca.com
- www.ca.com
- サービス拒否(DoS)
・W32/Yaha.af@MMは以下のサイトでサービス拒否(DoS)を実行します。
- pakrail.com
- paic.com.pk
- jamaat.org
- kse.net.pk
- pak.gov.pk
- Keylogging
キーロギング
・W32/Yaha.af@MMには、入力されたキーストローク情報を収集し、特定のアドレスに電子メールで送信するコードが含まれています。
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