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TROJ_CLICKER.CQC

October 16, 2012
 ALIASES:

Generic.dx!bb3l (McAfee); Trojan.Gen (Symantec); Trojan-Clicker.Win32.Agent.lxz (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Backdoor.Generic.474343 (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:

991,392 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

16 Oct 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:

  • %Windows%\GameSetup
  • %Favorites%\³£ÓÃ

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %Favorites% is the current user's Favorites folder, which is usually C:\Windows\Favorites on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Favorites on Windows NT, and C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003.)

Other System Modifications

This Trojan deletes the following files:

  • %Windows%\GameSetup\REGIES~1.BAT

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

It deletes the following folders:

  • %Windows%\GameSetup\Winsystem.tmpWinsystem.tmp
  • %Windows%\GameSetup\Winsystem.tmp
  • %Windows%\GameSetup\system.vbssystem.vbs
  • %Windows%\GameSetup\system.vbs
  • %Windows%\GameSetup\Winloginsystem.dllWinloginsystem.dll
  • %Windows%\GameSetup\Winloginsystem.dll
  • %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnkLaunch Internet Explorer Browser.lnk
  • %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnk

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\Shell

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\DefaultIcon\
InProcServer32

HKEY_CLASSES_ROOT\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\
Shell\Open\Command

HKEY_CLASSES_ROOT\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\
Shell\ÊôÐÔ(&D)\Command

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\ClassicStartMenu

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}
{305ca226-d286-468e-b848-2b2e8e697b74} 2 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\ClassicStartMenu
{871C5380-42A0-1069-A2EA-08002B30309D} = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
{871C5380-42A0-1069-A2EA-08002B30309D} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes
.uri = "InternetShortcut"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes
.ink = "lnkfile"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\InProcServer32
ThreadingModel = "Apartment"

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

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\ShellFolder
Attributes = "{random values}"

(Note: The default value data of the said registry entry is 20180000.)

Dropping Routine

This Trojan drops the following files:

  • %Windows%\GameSetup\Winsystem.tmp
  • %Windows%\GameSetup\2xi.ico
  • %Windows%\GameSetup\baidu.ico
  • %Windows%\GameSetup\bingfeng.ico
  • %Windows%\GameSetup\bookmarks.dat
  • %Windows%\GameSetup\Config.ini
  • %Windows%\GameSetup\dangdangwang.ico
  • %Windows%\GameSetup\jiuzhou.ico
  • %Windows%\GameSetup\minigame.ico
  • %Windows%\GameSetup\Setup.exe
  • %Windows%\GameSetup\system.vbs
  • %Windows%\GameSetup\taobao.ico
  • %Windows%\GameSetup\Thumbs.db
  • %Windows%\GameSetup\url.txt
  • %Windows%\GameSetup\Winloginsystem.dll
  • %Windows%\GameSetup\Xianjian.ico
  • %Windows%\GameSetup\zhuoyue.ico
  • %Windows%\GameSetup\Internet.Html
  • %System%\system.ink
  • %Windows%\GameSetup\RegIEShortcut.bat
  • %User Profile%\Quick Launch\Launch Internet Explorer Browser.ink
  • %Windows%\GameSetup\µ±µ±Íø.Html
  • %Favorites%\³£ÓÃ\µ±µ±Íø.lnk
  • %Favorites%\µ±µ±Íø.lnk
  • %Windows%\GameSetup\׿ԽÍø.Html
  • %Favorites%\³£ÓÃ\׿ԽÍø.lnk
  • %Favorites%\׿ԽÍø.lnk
  • %Windows%\GameSetup\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.Html
  • %Favorites%\³£ÓÃ\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.lnk
  • %Favorites%\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.lnk
  • %Windows%\GameSetup\Î÷ÓÎÍø.Html
  • %Favorites%\³£ÓÃ\Î÷ÓÎÍø.lnk
  • %Favorites%\Î÷ÓÎÍø.lnk
  • %Start Menu%\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.ink
  • %Windows%\GameSetup\Intenet Exploer.Html
  • %Start Menu%\Intenet Exploer.ink
  • %User Profile%\Quick Launch\Intenet Exploer.ink
  • %Windows%\GameSetup\Î÷ÓΡ¤Ïɽ£.Html
  • %Favorites%\³£ÓÃ\Î÷ÓΡ¤Ïɽ£.lnk
  • %Favorites%\Î÷ÓΡ¤Ïɽ£.lnk
  • %Desktop%\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.ink
  • %Windows%\GameSetup\СÓÎÏ·.Html
  • %Favorites%\³£ÓÃ\СÓÎÏ·.lnk
  • %Favorites%\СÓÎÏ·.lnk
  • %Desktop%\СÓÎÏ·.ink
  • %User Profile%\Quick Launch\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.ink
  • %User Profile%\Quick Launch\Î÷ÓΡ¤Ïɽ£.ink
  • %Desktop%\Î÷ÓΡ¤Ïɽ£.ink
  • %System%\Winsystem1.tmp
  • %Windows%\Fonts\Winsystem1.tmp
  • %System%\Winloginsystem.dll
  • %System%\system.vbs
  • %User Profile%\data\bookmarks.dat
  • %Program Files%\Internet Explorer\Connection Wizard\iexplore.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %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.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Favorites% is the current user's Favorites folder, which is usually C:\Windows\Favorites on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Favorites on Windows NT, and C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %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.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://so1.{BLOCKED}5.net/interface?{random characters}
  • http://w.{BLOCKED}i.com/json/NewGameList.xml

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

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\Classes\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}
    • Shell
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\DefaultIcon
    • InProcServer32
  • In HKEY_CLASSES_ROOT\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\Shell\Open
    • Command
  • In HKEY_CLASSES_ROOT\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\Shell\ÊôÐÔ(&D)
    • Command
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
    • ClassicStartMenu
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
    • NewStartPanel

Step 3

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\Classes\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}
    • {305ca226-d286-468e-b848-2b2e8e697b74} 2 = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\ClassicStartMenu
    • {871C5380-42A0-1069-A2EA-08002B30309D} = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons\NewStartPanel
    • {871C5380-42A0-1069-A2EA-08002B30309D} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
    • .uri = "InternetShortcut"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
    • .ink = "lnkfile"

Step 4

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\Classes\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\InProcServer32
    • From: ThreadingModel = "Apartment"
      To: ThreadingModel = ""Apartment""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc849}\ShellFolder
    • From: Attributes = "{random values}"
      To: Attributes = ""20180000""

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.
  • %Windows%\GameSetup\Winsystem.tmp
  • %Windows%\GameSetup\2xi.ico
  • %Windows%\GameSetup\baidu.ico
  • %Windows%\GameSetup\bingfeng.ico
  • %Windows%\GameSetup\bookmarks.dat
  • %Windows%\GameSetup\Config.ini
  • %Windows%\GameSetup\dangdangwang.ico
  • %Windows%\GameSetup\jiuzhou.ico
  • %Windows%\GameSetup\minigame.ico
  • %Windows%\GameSetup\Setup.exe
  • %Windows%\GameSetup\system.vbs
  • %Windows%\GameSetup\taobao.ico
  • %Windows%\GameSetup\Thumbs.db
  • %Windows%\GameSetup\url.txt
  • %Windows%\GameSetup\Winloginsystem.dll
  • %Windows%\GameSetup\Xianjian.ico
  • %Windows%\GameSetup\zhuoyue.ico
  • %Windows%\GameSetup\Internet.Html
  • %System%\system.ink
  • %Windows%\GameSetup\RegIEShortcut.bat
  • %User Profile%\Quick Launch\Launch Internet Explorer Browser.ink
  • %Windows%\GameSetup\µ±µ±Íø.Html
  • %Favorites%\³£ÓÃ\µ±µ±Íø.lnk
  • %Favorites%\µ±µ±Íø.lnk
  • %Windows%\GameSetup\׿ԽÍø.Html
  • %Favorites%\³£ÓÃ\׿ԽÍø.lnk
  • %Favorites%\׿ԽÍø.lnk
  • %Windows%\GameSetup\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.Html
  • %Favorites%\³£ÓÃ\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.lnk
  • %Favorites%\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.lnk
  • %Windows%\GameSetup\Î÷ÓÎÍø.Html
  • %Favorites%\³£ÓÃ\Î÷ÓÎÍø.lnk
  • %Favorites%\Î÷ÓÎÍø.lnk
  • %Start Menu%\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.ink
  • %Windows%\GameSetup\Intenet Exploer.Html
  • %Start Menu%\Intenet Exploer.ink
  • %User Profile%\Quick Launch\Intenet Exploer.ink
  • %Windows%\GameSetup\Î÷ÓΡ¤Ïɽ£.Html
  • %Favorites%\³£ÓÃ\Î÷ÓΡ¤Ïɽ£.lnk
  • %Favorites%\Î÷ÓΡ¤Ïɽ£.lnk
  • %Desktop%\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.ink
  • %Windows%\GameSetup\СÓÎÏ·.Html
  • %Favorites%\³£ÓÃ\СÓÎÏ·.lnk
  • %Favorites%\СÓÎÏ·.lnk
  • %Desktop%\СÓÎÏ·.ink
  • %User Profile%\Quick Launch\ÌÔ±¦Íø½ñÈÕÌؼÛÇø.ink
  • %User Profile%\Quick Launch\Î÷ÓΡ¤Ïɽ£.ink
  • %Desktop%\Î÷ÓΡ¤Ïɽ£.ink
  • %System%\Winsystem1.tmp
  • %Windows%\Fonts\Winsystem1.tmp
  • %System%\Winloginsystem.dll
  • %System%\system.vbs
  • %User Profile%\data\bookmarks.dat
  • %Program Files%\Internet Explorer\Connection Wizard\iexplore.exe

Step 6

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.
  • %Windows%\GameSetup
  • %Favorites%\³£ÓÃ

Step 7

Scan your computer with your Trend Micro product to delete files detected as TROJ_CLICKER.CQC. 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 8

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.

  • %Windows%\GameSetup\REGIES~1.BAT


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