TROJ_AGENT_042431.TOMB


 ALIASES:

Adware:Win32/GameVance (Microsoft); GameVance.gen.g. (McAfee); Gamevance LLC (v) (Sunbelt); Application:W32/GameVance.L (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

2,226,464 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

29 Jun 2012

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan creates the following folders:

  • %Program Files%\Gamevance
  • %User Profile%\Application Data\Mozilla
  • %User Profile%\Mozilla\Extensions
  • %User Profile%\Extensions\{ec8030f7-c20a-464f-9b0e-13a3a9e97384}
  • %User Profile%\{ec8030f7-c20a-464f-9b0e-13a3a9e97384}\textlinks@gamevance.com
  • %User Profile%\textlinks@gamevance.com\components
  • %User Profile%\textlinks@gamevance.com\chrome

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Gamevance = "%Program Files%\Gamevance\gamevance32.exe a"

It registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{beaC7DC8-E106-4C6A-931E-5A42E7362883}

Other System Modifications

This Trojan deletes the following files:

  • %Program Files%\Gamevance\arsplg.dll
  • %Desktop%\ArcadeRockstar.lnk
  • %Application Data%\IconCache.db

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Gamevance

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects

HKEY_CLASSES_ROOT\CLSID\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}

HKEY_CLASSES_ROOT\CLSID\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}\
InprocServer32

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Google Chrome

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Google Chrome

HKEY_CURRENT_USER\Software\AppDataLow\
gvtl

HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\
System\BIOS

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}

HKEY_CLASSES_ROOT\AppID\GamevanceText.DLL

HKEY_CLASSES_ROOT\GamevanceText.Linker.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
GamevanceText.Linker.1\CLSID

HKEY_CLASSES_ROOT\GamevanceText.Linker

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
GamevanceText.Linker\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
GamevanceText.Linker\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}\TypeLib

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Gamevance
DisplayName = "Gamevance"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Gamevance
UninstallString = "%Program Files%\Gamevance\gvun.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Gamevance
DisplayIcon = "%Program Files%\Gamevance\gvun.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}
NoExplorer = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\GamevanceText.DLL
AppID = "{beaC7DC8-E106-4C6A-931E-5A42E7362883}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{beaC7DC8-E106-4C6A-931E-5A42E7362883}
NoExplorer = "1"

Dropping Routine

This Trojan drops the following files:

  • %Program Files%\Gamevance\gamevancelib32.dll
  • %Program Files%\Gamevance\gamevance32.exe
  • %Program Files%\Gamevance\gvun.exe
  • %Program Files%\Gamevance\ars.cfg
  • %Program Files%\Gamevance\icon.ico
  • %Program Files%\Gamevance\gvtl.dll
  • %Program Files%\Gamevance\gvff.tmp
  • %User Profile%\textlinks@gamevance.com\chrome.manifest
  • %User Profile%\textlinks@gamevance.com\install.rdf
  • %User Profile%\components\gvtlf.dll
  • %User Profile%\components\gvtlf.xpt
  • %User Profile%\chrome\gvtextlinks.jar
  • %User Temp%\dplinst.exe

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://www.{BLOCKED}nce.com/aj/inst.php?{random characters}
  • http://af.{BLOCKED}{BLOCKED}.facdn.com/{BLOCKED}{BLOCKED}/download/dogpiletoolbar/Dogpile_Toolbar.exe

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Restart in Safe Mode

[ Learn More ]

Step 3

Close all opened browser windows

Step 4

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Gamevance
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
    • Browser Helper Objects
  • In HKEY_CLASSES_ROOT\CLSID
    • {0ED403E8-470A-4a8a-85A4-D7688CFE39A3}
  • In HKEY_CLASSES_ROOT\CLSID\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}
    • InprocServer32
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Google Chrome
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Google Chrome
  • In HKEY_CURRENT_USER\Software\AppDataLow
    • gvtl
  • In HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System
    • BIOS
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings
    • {0ED403E8-470A-4a8a-85A4-D7688CFE39A3}
  • In HKEY_CLASSES_ROOT\AppID
    • GamevanceText.DLL
  • In HKEY_CLASSES_ROOT
    • GamevanceText.Linker.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\GamevanceText.Linker.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • GamevanceText.Linker
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\GamevanceText.Linker
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\GamevanceText.Linker
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {beaC7DC8-E106-4C6A-931E-5A42E7362883}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}
    • TypeLib

Step 5

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Gamevance = "%Program Files%\Gamevance\gamevance32.exe a"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gamevance
    • DisplayName = "Gamevance"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gamevance
    • UninstallString = "%Program Files%\Gamevance\gvun.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Gamevance
    • DisplayIcon = "%Program Files%\Gamevance\gvun.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}
    • NoExplorer = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{0ED403E8-470A-4a8a-85A4-D7688CFE39A3}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\GamevanceText.DLL
    • AppID = "{beaC7DC8-E106-4C6A-931E-5A42E7362883}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{beaC7DC8-E106-4C6A-931E-5A42E7362883}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{beaC7DC8-E106-4C6A-931E-5A42E7362883}
    • NoExplorer = "1"

Step 6

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Program Files%\Gamevance\gamevancelib32.dll
  • %Program Files%\Gamevance\gamevance32.exe
  • %Program Files%\Gamevance\gvun.exe
  • %Program Files%\Gamevance\ars.cfg
  • %Program Files%\Gamevance\icon.ico
  • %Program Files%\Gamevance\gvtl.dll
  • %Program Files%\Gamevance\gvff.tmp
  • %User Profile%\textlinks@gamevance.com\chrome.manifest
  • %User Profile%\textlinks@gamevance.com\install.rdf
  • %User Profile%\components\gvtlf.dll
  • %User Profile%\components\gvtlf.xpt
  • %User Profile%\chrome\gvtextlinks.jar
  • %User Temp%\dplinst.exe

Step 7

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Program Files%\Gamevance
  • %User Profile%\Application Data\Mozilla
  • %User Profile%\Mozilla\Extensions
  • %User Profile%\Extensions\{ec8030f7-c20a-464f-9b0e-13a3a9e97384}
  • %User Profile%\{ec8030f7-c20a-464f-9b0e-13a3a9e97384}\textlinks@gamevance.com
  • %User Profile%\textlinks@gamevance.com\components
  • %User Profile%\textlinks@gamevance.com\chrome

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_AGENT_042431.TOMB. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 9

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %Program Files%\Gamevance\arsplg.dll
  • %Desktop%\ArcadeRockstar.lnk
  • %Application Data%\IconCache.db


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