TROJ_GAMETHI.SDB

October 09, 2012
 Analysis by: Sabrina Lei Sioting
 Modified by: Karl Dominguez
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

It monitors web browsers and steal user credentials related to gaming sites.

This spyware may be dropped by other malware.

It steals sensitive information such as user names and passwords related to certain games.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

102,400 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

10 Jul 2011

Payload:

Steals information

Arrival Details

This spyware may be dropped by other malware.

Installation

This spyware is injected into the following processes running in memory:

  • Iexplore.exe
  • Explorer.exe

It terminates itself if it finds the following processes in the affected system's memory:

  • ALYac.aye
  • AyAgent.aye
  • SkyMon.exe
  • SystemMon.exe
  • V3Light.exe
  • V3LSvc.exe
  • V3LTray.exe

Dropping Routine

This spyware drops the following files wherein it saves the information it gathers:

  • %System%\AionLog.ini
  • %System%\DfLog.ini
  • %System%\FFLog.ini
  • %System%\GameLog.ini
  • %System%\hangame.ini
  • %System%\LuoqiLog.ini
  • %System%\MXDLog.ini
  • %System%\pmangLog.ini
  • %System%\TianyiLog.ini
  • %Windows%\DarkBloodLog.ini
  • %Windows%\FBloodLog.ini
  • %Windows%\HEAVLog.ini
  • %Windows%\it1.ini
  • %Windows%\maestia.ini

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Information Theft

This spyware steals sensitive information such as user names and passwords related to the following games:

  • DarkBlood.exe
  • dnf.exe
  • ExLauncher.exe
  • ff2client.exe
  • Game.exe
  • heroes.exe
  • lin.bin
  • LOB.exe
  • MapleStory.exe
  • OTP
  • TERA.exe

Other Details

This spyware requires its main component to successfully perform its intended routine.

NOTES:

This malware is usually dropped as %System%\imm32.DLL. A legitimate imm32.DLL exists in the said folder, thus it is replaced by this malicious file.

It also monitors the Internet browser of the affected system to steal user credentials form the following gaming sites:

  • lineage.plaync.co.kr
  • hangame.com
  • aion.plaync.co.kr
  • bm.ndoors.com
  • pmang.com
  • www.netmarble.net
  • login.netmarble.net
  • maestia.ndolfin.com
  • heva.windyzone.com

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI OPR PATTERN File:

8.277.00

VSAPI OPR PATTERN Date:

10 Jul 2011

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

Scan your computer with your Trend Micro product and note files detected as TROJ_GAMETHI.SDB

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete the file detected as TROJ_GAMETHI.SDB

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files in the search result.

Step 5

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.
  • %System%\AionLog.ini
  • %System%\DfLog.ini
  • %System%\FFLog.ini
  • %System%\GameLog.ini
  • %System%\hangame.ini
  • %System%\LuoqiLog.ini
  • %System%\MXDLog.ini
  • %System%\pmangLog.ini
  • %System%\TianyiLog.ini
  • %Windows%\DarkBloodLog.ini
  • %Windows%\FBloodLog.ini
  • %Windows%\HEAVLog.ini
  • %Windows%\it1.ini
  • %Windows%\maestia.ini

    • Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
  • Once located, select the file then press SHIFT+DELETE to permanently delete the file.
  • Repeat the said steps for all files listed.

    • Step 6

    Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_GAMETHI.SDB. 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 7

    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.

    • %System%\imm32.dll


    Did this description help? Tell us how we did.