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Компьютерные новости: Тундра

Комп новости Москва. Свет увидела новая версия программы Тундра - 2.3. Кроме ряда косметических улучшений программа обзавелась базой миттельшпилей, а любители и знатоки португальского могут теперь общаться с Тундрой именно на этом языке. Подробности читайте на сайте программы.
Автор Kavr в Воскресенье, Мая 22, 2005 (6217 Просмотр(а)(ов))
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Комментарии

plus600
May 23, 2005 - 05:35 AM
Re: Тундра
Разбираться некогда, но сообщения антивируса при заходе на сайт Тундры понравилось:
============================
Scan type: Auto-Protect Scan
Event: Threat Found!
Threat: VBS.Redlof.A
File: D:\Documents And Settings\SStartsev\Local Settings\Temporary Internet Files\Content.IE5\KHIB4TE3\tundra2[2]
Location: D:\Documents And Settings\SStartsev\Local Settings\Temporary Internet Files\Content.IE5\KHIB4TE3
Computer: SSTARTCEV
User: SStartsev
Action taken: Clean failed : Quarantine failed : Access denied
Date found: 23 май 2005 г. 13:34:52
========================
plus600
May 23, 2005 - 05:40 AM
Re: Тундра
И информация с сайта Семантика http://securityresponse.symantec.com/avcenter/venc/data/html.redlof.a.html (для лечения!):
=============================
HTML.Redlof.A
Discovered on: April 16, 2002
Last Updated on: February 07, 2003 07:38:05 AM


HTML.Redlof.A is a polymorphic, encrypted, Visual Basic Script virus that infects .html, .htm, .asp, .php, .jsp, and .vbs files on all drives. Depending on the location of the Windows System folder, the virus copies itself to either %windir%\System\Kernel.dll or %windir%\System\Kernel32.dll. It changes the default association for .dll files.

Also Known As: VBS/Redlof@M [McAfee], VBS.Redlof [AVP], VBS_REDLOF.A [Trend], VBS/Redlof-A [Sophos]

Type: Virus


Systems Affected: Windows 3.x, Windows 95, Windows 98, Windows NT, Windows 2000, Windows XP, Windows Me
Systems Not Affected: UNIX, Linux


Virus Definitions (Intelligent Updater) *
April 16, 2002

Virus Definitions (LiveUpdate™) **
April 17, 2002


*
Intelligent Updater definitions are released daily, but require manual download and installation.
Click here to download manually.

**
LiveUpdate virus definitions are usually released every Wednesday.
Click here for instructions on using LiveUpdate.


Wild:

Number of infections: 50 - 999
Number of sites: 3 - 9
Geographical distribution: Medium
Threat containment: Easy
Removal: Moderate
Threat Metrics


Wild:
Medium
Damage:
Low
Distribution:
Low


Damage

Payload: Will be inserted into all new e-mail messages created by an infected user.
Modifies files: Infects .html, .htm, .asp, .php, .jsp, and .vbs files
Distribution

Target of infection: .html, .htm, .asp, .php, .jsp, and .vbs files

When HTML.Redlof.A runs, it does the following:

It decrypts its viral body and executes it.

Depending on the location of the Windows System folder, the virus copies itself as one of the following:

%windir%\System\Kernel.dll
%windir%\System\Kernel32.dll

NOTE: %windir% is a variable. The worm locates the primary Windows installation folder (by default this is C:\Windows or C:\Winnt) and copies itself to that location.

The virus makes the following changes to the registry to allow execution of .dll files as script files:
It verifies that the (Default) value of the registry key

HKEY_CLASSES_ROOT\.dll

is equal to

dllfile

For the registry key

HKEY_CLASSES_ROOT\.dll

the virus verifies that the value

Content Type

is equal to

application/x-msdownload

In the registry key

HKEY_CLASSES_ROOT\dllFile

the virus changes these subkeys:

DefaultIcon

is changed to the same value as the value of the DefaultIcon subkey that is under the registry key

HKEY_CLASSES_ROOT\vxdfile

It adds the subkey ScriptEngine

and changes its value to

VBScript

It adds the subkey ScriptHostEncode

and changes its value to

{85131631-480C-11D2-B1F9-00C04F86C324}

In the registry key

HKEY_CLASSES_ROOT\dllFile\Shell\Open\Command\

the virus adds a (Default) value of

"%windir%\WScript.exe ""%1"" %*"

or

"%windir%\System32\WScript.exe ""%1"" %*"

In the registry key

HKEY_CLASSES_ROOT\dllFile\ShellEx\PropertySheetHandlers\WSHProps

the virus sets the (Default) value to

{60254CA5-953B-11CF-8C96-00AA00B8708C}

The virus searches for files that have the file extensions .html, .htm, .asp, .php, .jsp, and .vbs in all folders and on all drives, and infects those files.

HTML.Redlof.A spreads by adding itself as the default stationery that is used to create email messages:
It either copies itself to C:\Program Files\Common Files\Microsoft Shared\Stationery\Blank.htm or, if that file already exists, it appends itself to the file.
It then sets Outlook Express to use stationery by default. To do this, in the registry key

HKEY_CURRENT_USER\Identities\[Default Use ID]\Software\Microsoft\
Outlook Express\[Outlook Version].0\Mail

the virus sets the value of

Compose Use Stationery

to 1.

Then, if the following values do not exist, they are created with the following value data:

In the registry key

HKEY_CURRENT_USER\Identities\[Default Use ID]\Software\Microsoft\
Outlook Express\[Outlook Version].0\Mail

the virus changes the value data of

Stationery Name

to

C:\Program Files\Common Files\Microsoft Shared\Stationery\blank.htm

In the registry key

HKEY_CURRENT_USER\Identities\[Default Use ID]\Software\Microsoft\
Outlook Express\[Outlook Version].0\Mail

the virus changes the value data of

Wide Stationery Name

to

C:\Program Files\Common Files\Microsoft Shared\Stationery\blank.htm

In the registry key

HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Options\Mail

the virus sets the value data of

EditorPreference

to

131072

Next, if the following values do not exist, they are created and set to "blank":

The value:

001e0360

in the registry key:

HKEY_CURRENT_USER\Software\Microsoft\Windows Messaging Subsystem\
Profiles\Microsoft Outlook Internet Settings\0a0d020000000000c000000000000046

The value:

001e0360

in the registry key:

HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\
Windows Messaging Subsystem\Profiles\Microsoft Outlook Internet Settings\
0a0d020000000000c000000000000046

The value:

NewStationery

in the registry key:

HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Common\MailSettings

In the registry key

HKEY_CURRENT_USER\Software\Microsoft\Office\
10.0\Outlook\Options\Mail\EditorPreference

the virus sets the value in

EditorPreference

to

131072

Finally, in the registry key

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

the virus adds the value

Kernel32

and sets it to

SYSTEM\Kernel32.dll or SYSTEM\Kernel.dll







Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

Turn off and remove unneeded services. By default, many operating systems install auxiliary services that are not critical, such as an FTP server, telnet, and a Web server. These services are avenues of attack. If they are removed, blended threats have less avenues of attack and you have fewer services to maintain through patch updates.
If a blended 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.
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.
Configure your email server to block or remove email that contains file attachments that are commonly used to spread viruses, such as .vbs, .bat, .exe, .pif and .scr files.
Isolate infected computers quickly to prevent further compromising your organization. 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.


NOTE: These instructions are for all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.


Update the virus definitions.
Run a full system scan, and delete all files that are detected as HTML.Redlof.A.
Reverse the changes that the virus made to the registry.

For details on how to do this, read the following instructions.

To update the virus definitions:
All virus definitions receive full quality assurance testing by Symantec Security Response before being posted to our servers. There are two ways to obtain the most recent virus definitions:
Run LiveUpdate, which is the easiest way to obtain virus definitions. These virus definitions are posted to the LiveUpdate servers one time each week (usually Wednesdays) unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, look at the Virus Definitions (LiveUpdate) line at the top of this write-up.
Download the definitions using the Intelligent Updater. Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). They must be downloaded from the Symantec Security Response Web site and installed manually. To determine whether definitions for this threat are available by the Intelligent Updater, look at the Virus Definitions (Intelligent Updater) line at the top of this write-up.

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.

To scan for and delete the infected files:
Start your Symantec antivirus program, and make sure that it is configured to scan all files.
Norton AntiVirus consumer products: Read the document How to configure Norton AntiVirus to scan all files.
Symantec enterprise antivirus products: Read the document How to verify a Symantec Corporate antivirus product is set to scan All Files.
Run a full system scan.
If any files are detected as infected with HTML.Redlof.A, click Delete. Replace deleted files from a clean backup or reinstall them.

To reverse the changes that the virus 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 only the keys that are specified. Read the document How to make a backup of the Windows registry for instructions.

Click Start, and click Run. The Run dialog box appears.
Type regedit and then click OK. The Registry Editor opens.
Navigate to the key

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

In the right pane, delete the value

Kernel32

Navigate to the key

HKEY_CURRENT_USER\Identities\[Default Use ID]\Software\
Microsoft\Outlook Express\[Outlook Version].0\Mail

In the right pane, delete the values

Compose Use Stationery
Stationery Name
Wide Stationery Name

Navigate to the key

HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Options\Mail

In the right pane, delete the value

EditorPreference

Navigate to and delete these subkeys:

HKEY_CLASSES_ROOT\dllFile\Shell
HKEY_CLASSES_ROOT\dllFile\ShellEx
HKEY_CLASSES_ROOT\dllFile\ScriptEngine
HKEY_CLASSES_ROOT\dllFile\ScriptHostEncode

Exit the Registry Editor.





Revision History:


May 14, 2002. Upgraded to level 2.
July 11, 2002. Added alias information.
October 21, 2002. Revised Removal instruction to add registry information





Write-up by: Andre Post



 
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