TROJ_OLGAME.ITW


 ALIASES:

StartPage-NS (McAfee); Trojan.Gen (Symantec); PAK:UPX (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)

 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:

19,968 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

22 Aug 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 drops the following copies of itself into the affected system:

  • %Program Files%\Common Files\sfbsbvy\coiome.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

It creates the following folders:

  • %Program Files%\Common Files\sfbsbvy

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

Autostart Technique

This Trojan modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "Explorer.exe"

(Note: The default value data of the said registry entry is Explorer.exe.)

Other System Modifications

This Trojan deletes the following files:

  • %Program Files%\Common Files\sfbsbvy\coiome.exe
  • %Program Files%\YFC.hta
  • %System%\tccj.dll
  • %Windows%\QQSAFER.EXE
  • %Program Files%\common files\Microsoft Shared\MSInfo\iejore.exe
  • %Windows%\Qedie\conime.exe
  • %Windows%\°Ù¶ÈÒ»ÏÂ.url
  • %Desktop%\°Ù¶ÈÒ»ÏÂ.url
  • %Desktop%\hao123.url
  • %Desktop%\360°²È«ä¯ÀÀÆ÷.lnk
  • %Windows%\ModFan\mone.dll
  • %Windows%\UoDo\game.dll
  • \w3wp.exe
  • \pagefile.exe
  • \vdswho.dll
  • \vdswho.nls
  • %System Root%\autorun.inf
  • d:\autorun.inf
  • e:\autorun.inf
  • f:\autorun.inf
  • %System Root%\w3wp.exe
  • d:\w3wp.exe
  • e:\w3wp.exe
  • f:\w3wp.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %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.. %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.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Dropping Routine

This Trojan drops the following files:

  • %Program Files%\GHO.hta
  • %Desktop%\2345ÍøÖ·µ¼º½.url

(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.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://t.{BLOCKED}0.com/b.jpg

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

Identify and delete files detected as TROJ_OLGAME.ITW using either the Startup Disk or Recovery Console

[ Learn More ]

Step 3

Restore this modified 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 NT\CurrentVersion\Winlogon
    • From: Shell = "Explorer.exe"
      To: Shell = ""Explorer.exe""

Step 4

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%\GHO.hta
  • %Desktop%\2345ÍøÖ·µ¼º½.url

Step 5

Search and delete this folder

[ 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%\Common Files\sfbsbvy

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_OLGAME.ITW. 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.

  • %Program Files%\Common Files\sfbsbvy\coiome.exe
  • %Program Files%\YFC.hta
  • %System%\tccj.dll
  • %Windows%\QQSAFER.EXE
  • %Program Files%\common files\Microsoft Shared\MSInfo\iejore.exe
  • %Windows%\Qedie\conime.exe
  • %Windows%\°Ù¶ÈÒ»ÏÂ.url
  • %Desktop%\°Ù¶ÈÒ»ÏÂ.url
  • %Desktop%\hao123.url
  • %Desktop%\360°²È«ä¯ÀÀÆ÷.lnk
  • %Windows%\ModFan\mone.dll
  • %Windows%\UoDo\game.dll
  • \w3wp.exe
  • \pagefile.exe
  • \vdswho.dll
  • \vdswho.nls
  • %System Root%\autorun.inf
  • d:\autorun.inf
  • e:\autorun.inf
  • f:\autorun.inf
  • %System Root%\w3wp.exe
  • d:\w3wp.exe
  • e:\w3wp.exe
  • f:\w3wp.exe


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