Virus Profile: Skintrim.gen.f!015A8C36BA8B

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 9/21/2012
Date Added: 9/21/2012
Origin: Unknown
Length: 178167
Type: Trojan
Subtype: Generic
DAT Required: 6842
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 DetectionSkintrim.gen.f
Length178167 bytes
MD5015a8c36ba8b9ec7fb18541c7bef8798
SHA1ab49bb7547e5ed5f221fec98312164c324e80d22


Other Common Detection Aliases

Company NamesDetection Names
ahnlabWin-Trojan/Skintrim.178152
avastWin32:VB-MBN
AVG (GriSoft)Dropper.Small.aqd
aviraDIAL/0079200832
Kasperskynot-a-virus:Porn-Dialer.Win32.InstantAccess.fpm
Dr.WebDialer.Egroup
F-Protw32/skintrim.a
FortiNetRiskware/InstantAccess
MicrosoftTrojan:Win32/Skintrim.N
SymantecDialer.Dialpass
EsetWin32/Dialer.NEZ
normanw32/dialer.b!genr
pandaAdware/InstantAccess
risingTrojan.Win32.Skintrim.FT
SophosMal/SkimTrim-B
Trend MicroDIAL_INSTACCES
vba32Trojan-Downloader.Win32.VB.lhe

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


ActivitiesRisk Levels
Attempts to connect to a high risk domain that may pose a security risk.High
Creates one or more shortcuts (.LNK files) to provide user accessible links to start a program usually form the desktop or start menu.Low
Enumerates many system files and directories.Low
Adds or modifies a COM object.Low
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaSkintrim.gen.f
McAfee SupportedSkintrim.gen.f



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:

015a8c36ba8b9ec7fb18541c7bef8798

The following files have been added to the system:

  • %PROGRAMFILES%\instant access\center\tray1.ico
  • %PROGRAMFILES%\Instant Access\Multi\20[private subnet]\js\js_api_dialer.php
  • %PROGRAMFILES%\Instant Access\Multi\20[private subnet]\instant access.exe
  • %PROGRAMFILES%\Instant Access\Center\NoCreditCard.upd
  • %WINDIR%\dialerexe.ini
  • %PROGRAMFILES%\Instant Access\Multi\20[private subnet]\Common\module.php
  • %PROGRAMFILES%\Instant Access\Multi\20[private subnet]\dialerexe.ini
  • %PROGRAMFILES%\Instant Access\Multi\20[private subnet]\medias\dialer.ico
  • %WINDIR%\SYSTEM32\nsinet.exe
  • %USERPROFILE%\Start Menu\Monjas Desnudas.lnk
  • %PROGRAMFILES%\Instant Access\Center\Monjas Desnudas.lnk
  • %ALLUSERSPROFILE%\Desktop\Monjas Desnudas.lnk
  • %TEMP%\333F2.dmp
  • %PROGRAMFILES%\Instant Access\DesktopIcons\Monjas Desnudas.lnk

The following files were temporarily written to disk then later removed:

  • %WINDIR%\dialexe.zl
  • %WINDIR%\dialexe.epk

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\TRUSTEDPUBLISHER\CERTIFICATES\E6A6A4A475FCE37F8B5AC2F1244DEB2BFCA5615\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\WINTRUST\TRUST PROVIDERS\SOFTWARE PUBLISHING\TRUST DATABASE\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\WINTRUST\TRUST PROVIDERS\SOFTWARE PUBLISHING\TRUST DATABASE\0\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{DF1C8E21-4045-4D67-B528-335F1A4F0DE9}\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{DF1C8E21-4045-4D67-B528-335F1A4F0DE9}\LOCALSERVER32\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\CODE STORE DATABASE\NT5LOCKDOWNTEST\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\INSTANT ACCESS\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\CA_DELAY
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\CA_DISCOERRORMSG
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\CA_DISCOMSG
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\CA_PASSACCESSDELAY = 0
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\CA_PASSGENDELAY = 0
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\CERT = YES
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\EXESTARTFILE
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\UPD_COM_TIME = 1343199003
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\UPD_COM_TIME_BETWEEN = 86400
  • HKEY_CURRENT_USER\SOFTWARE\EGDHTML\UPDATE_SCRIPT = http://update.dlv4.com/updscript.php?p=14e416e638e81a8b7a09e717e51594b516e648b91abb1ab918078665247536b708595a8b4d59781a26386738565a086c5d9b6d3c283a7618b458791a3b3c5d3f3e49b817c505c305c517&promo_url=http%3A%2F%2Fscripts.dlv4.com%2FCommon%2Fmodule.php%3Flogin%3D631978%26amp%2F%3Bamp%2F%2F%3Bamp%2F%2F%2F%3Bamp%2F%2F%2F%2F%3Bamp%2F%2F%2F%2F%2F%3Bamp%2F%2F%2F%2F%2F%2F%3Bicp%3DFIREFOX3.0.10_WINXP_1.199_VE_ES_1_1_631978_1.1.3.1870.1.19_us2_1.60__CARACAS_unknown_iso%26icp%3DMSIE6.0_WINXP%26country%3D1.4%26isautogen
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\TRUSTEDPUBLISHER\CERTIFICATES\E6A6A4A475FCE37F8B5AC2F1244DEB2BFCA5615\BLOB = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\INSTANT ACCESS = %WINDIR%\SYSTEM32\nsinet.exe /res
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\WINTRUST\TRUST PROVIDERS\SOFTWARE PUBLISHING\TRUST DATABASE\0\GOICFBOOGIDIKKEJCCMCLPIEICIHHLPO HPFANICGKFFMCCEHNPKIKOGCFFAEPKFP = electronic-group
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\INSTANT ACCESS\DISPLAYNAME = Instant Access
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\INSTANT ACCESS\UNINSTALLSTRING = %PROGRAMFILES%\Internet Explorer\IEXPLORE.EXE http://scripts.downloadv3.com/cleaner/DialpassUninstall.exe

The applications attempted the following network connection(s):

  • 208.87.35.***:80
  • hxxp://scripts.dlv4.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.

   

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