TSPY_ONLINEG.GAN


 ALIASES:

PWS:Win32/OnLineGames.AH (Microsoft); Generic.mg (McAfee); Trojan.Gen.2 (Symantec); Worm.Win32.Taterf.b (v) (Sunbelt)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

170,496 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

30 Oct 2012

Arrival Details

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

Autostart Technique

This spyware 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\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}

It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\10c095f2

Other System Modifications

This spyware deletes the following files:

  • %Program Files%\Internet Explorer\ws2help.dll
  • %Program Files%\Internet Explorer\wshtcpip.dll

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

It adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\HOOK_ID

HKEY_CLASSES_ROOT\CLSID\SYS_DLL

HKEY_CLASSES_ROOT\IEHlprObj.IEHlprObj.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
IEHlprObj.IEHlprObj.1\CLSID

HKEY_CLASSES_ROOT\IEHlprObj.IEHlprObj

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
IEHlprObj.IEHlprObj\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}\InprocServer32

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

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}\TypeLib

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\HOOK_ID
name = "{malware file name}"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\10c095f2
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\10c095f2
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\10c095f2
Start = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\10c095f2
ImagePath = "\??\%System%\drivers\10c095f2.sys"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\SYS_DLL
name = "rfslfXarw.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}\TypeLib
Version = "1.0"

It deletes the following registry keys:

HKEY_CLASSES_ROOT\CLSID\TANG1_OTP

HKEY_CLASSES_ROOT\CLSID\SOS_OTP

HKEY_CLASSES_ROOT\CLSID\TANG1_NCP

HKEY_CLASSES_ROOT\CLSID\TANG1_URL

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{18DF081C-E8AD-4283-A596-FA578C2EBDC3}

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\10c095f2\Enum

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\10c095f2\Security

Dropping Routine

This spyware drops the following files:

  • %System%\drivers\10c095f2.sys
  • %System%\Softxnm.dll
  • %User Temp%\A1.zip
  • %User Temp%\B1.zip
  • %User Temp%\8rrJ.dll
  • %User Temp%\rfslfXarw.dll
  • %System%\wshtcpXN.dll
  • %System%\wshtcpip.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://get.{BLOCKED}s.com/xx/get.asp?{random characters}

It deletes itself after execution.

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

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\System\CurrentControlSet\Services
    • 10c095f2
  • In HKEY_CLASSES_ROOT\CLSID
    • HOOK_ID
  • In HKEY_CLASSES_ROOT\CLSID
    • SYS_DLL
  • In HKEY_CLASSES_ROOT
    • IEHlprObj.IEHlprObj.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • IEHlprObj.IEHlprObj
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
    • Browser Helper Objects
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{C5CC4DC8-5CCE-48A1-A00F-786507E7A63A}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}
    • 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\Classes\CLSID\HOOK_ID
    • name = "{malware file name}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\10c095f2
    • Type = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\10c095f2
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\10c095f2
    • Start = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\10c095f2
    • ImagePath = "\??\%System%\drivers\10c095f2.sys"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\SYS_DLL
    • name = "rfslfXarw.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C5CC4DC2-5CCE-48A1-A00F-786507E7A63A}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C5CC4DC1-5CCE-48A1-A00F-786507E7A63A}\TypeLib
    • Version = "1.0"

Step 6

Search and delete these components

[ Learn More ]
There may be some components 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%\drivers\10c095f2.sys
  • %System%\Softxnm.dll
  • %User Temp%\A1.zip
  • %User Temp%\B1.zip
  • %User Temp%\8rrJ.dll
  • %User Temp%\rfslfXarw.dll
  • %System%\wshtcpXN.dll
  • %System%\wshtcpip.dll

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ONLINEG.GAN. 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.

  • %Program Files%\Internet Explorer\ws2help.dll
  • %Program Files%\Internet Explorer\wshtcpip.dll

Step 9

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_CLASSES_ROOT\CLSID
    • TANG1_OTP
  • In HKEY_CLASSES_ROOT\CLSID
    • SOS_OTP
  • In HKEY_CLASSES_ROOT\CLSID
    • TANG1_NCP
  • In HKEY_CLASSES_ROOT\CLSID
    • TANG1_URL
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    • {18DF081C-E8AD-4283-A596-FA578C2EBDC3}
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\10c095f2
    • Enum
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\10c095f2
    • Security


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