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Virus Profile: Generic StartPage.ak!82C7CB15B0E5

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 6/18/2012
Date Added: 6/18/2012
Origin: Unknown
Length: 444955
Type: Trojan
Subtype: -
DAT Required: 6745
Removal Instructions
   
 
 
   

Description

This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Indication of Infection

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Methods of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

   

Virus Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionGeneric StartPage.ak
Length444955 bytes
MD582c7cb15b0e5ae34c57e7b81792e4d36
SHA15a098071058a72c6914f9bd1c9b5cfd5761ecd1b


Other Common Detection Aliases

Company NamesDetection Names
avastWin32:Malware-gen
aviraTR/Crypt.ASPM.Gen
KasperskyTrojan.Win32.Qhost.qxg
BitDefenderTrojan.Agent.ARCK
clamavPUA.Win32.Packer.Asprotect-2
Dr.WebTrojan.StartPage.34537
FortiNetW32/Pasta.GB!tr
MicrosoftTrojan:Win32/Startpage.OR
SymantecTrojan.Gen
EsetWin32/StartPage.OBA trojan (variant)
normanW32/StartPage.ALTB
risingTrojan.Win32.StartPage.qgs
SophosTroj/Pasta-H
Trend MicroTROJ_QHOST.SMUC1
vba32Trojan.Pasta.nth
V-BusterTrojan.Qhost!BjRg6fBE1XU (trojan)
Vet (Computer Associates)Win32/StartPage.UKM

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Attempts to modify the hosts file. This could be used to map hostnames different IP addresses redirecting traffic to an alternate location.High
Modifies Windows explorer file browser's Advanced settings. Sometimes used by malware to make executable files look like documents.Medium
Adds or modifies Shell Open registry value. Could be used to launch a program on startup.Medium
Enumerates many system files and directories.Low
Process attempts to call itself recursivelyLow
Attempts to write to a memory location of an unknown processLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaGeneric StartPage.ak
McAfee SupportedGeneric StartPage.ak



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

5a09807[private subnet]4f9bd1c9b5cfd5761ecd1b

The following files have been added to the system:

  • %USERPROFILE%\Favorites\ÌÔ±¦É̳Ç.url
  • %USERPROFILE%\Favorites\ÌÔ±¦ÍøÅ®×°.url
  • %APPDATA%\Microsoft\Internet Explorer\Quick Launch\Internet Explorer.html
  • %USERPROFILE%\Favorites\ÌÔ±¦ÌØÂô.url
  • %USERPROFILE%\Start Menu\Programs\Internet Explorer.html
  • %COMMONPROGRAMFILES%\system\taobao.ico
  • %USERPROFILE%\Desktop\ÌÔ±¦Íø£¡.htm
  • %USERPROFILE%\Start Menu\ÌÔ±¦Íø£¡.htm
  • %USERPROFILE%\Start Menu\Internet Explorer.html
  • %USERPROFILE%\Start Menu\Programs\ÌÔ±¦Íø£¡.htm
  • %USERPROFILE%\Desktop\Internet Explorer.html
  • %USERPROFILE%\Favorites\ÌÔ±¦»Ê¹ÚµêÆ̾«Ñ¡.url
The following files have been deleted:

  • %USERPROFILE%\Start Menu\Programs\Internet Explorer.lnk
The following files were temporarily written to disk then later removed:

  • %WINDIR%\SYSTEM32\msscp.reg
  • %WINDIR%\SYSTEM32\drivers\etc\hosts
The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\POLICIES\MICROSOFT\INTERNET EXPLORER\
  • HKEY_CURRENT_USER\SOFTWARE\POLICIES\MICROSOFT\INTERNET EXPLORER\CONTROL PANEL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\HTMFILE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\HTMFILE\DEFAULTICON\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\HTMFILE\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\HTMFILE\SHELL\OPEN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\HTMFILE\SHELL\OPEN\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\PLAYFLASHDXA\
The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\START PAGE = http://t.wozhao123.com
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\HIDEFILEEXT = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\SHOWSUPERHIDDEN = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\SUPERHIDDEN = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\POLICIES\EXPLORER\NOINTERNETICON = 0
  • HKEY_CURRENT_USER\SOFTWARE\POLICIES\MICROSOFT\INTERNET EXPLORER\CONTROL PANEL\HOMEPAGE = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\PLAYFLASHDXA\1 = 20100422
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\PLAYFLASHDXA\9 = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\PLAYFLASHDXA\CDAFILE2 = 191823
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\START PAGE = http://t.wozhao123.com
   

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.