TROJ_ONLINEG.OPE


 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.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

25,600 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

06 Sep 2013

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.

Autostart Technique

This Trojan 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\{E3C2200E-C290-4F51-A0F4-D945A27746EA}

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\64to32\Parameters

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}\Version

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}\TypeLib

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\64to32
Description = "applications to access the local Intel(R) Management and Security"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\64to32\Parameters
ServiceDll = "%System%\64to32.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{E3C2200E-C290-4F51-A0F4-D945A27746EA}
NoExplorer = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}\TypeLib
Version = "1.0"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Session Manager
ExcludeFromKnownDlls = "usp10.dll"

(Note: The default value data of the said registry entry is {random values}.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
netsvcs = "{random characters}"

(Note: The default value data of the said registry entry is {random values}.)

Dropping Routine

This Trojan drops the following files:

  • %System%\64to32.dll
  • %Temp%\rCD1dAMy.pif
  • %Temp%\VkfZW448.pif
  • %System%\Windows32.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://aug.{BLOCKED}9.com/ico/m829.exe
  • http://about.{BLOCKED}5.com/ico/main816.exe
  • http://do.{BLOCKED}8.com/main/m0816.txt
  • http://host.{BLOCKED}6.com/main/main0816.txt

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\64to32
    • Parameters
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {E3C2200E-C290-4F51-A0F4-D945A27746EA}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}
    • Version
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{DD4DE43B-ADD5-4DF8-8974-1DEC722F3E1F}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}
    • 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\SYSTEM\ControlSet001\Services\64to32
    • Description = "applications to access the local Intel(R) Management and Security"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\64to32\Parameters
    • ServiceDll = "%System%\64to32.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E3C2200E-C290-4F51-A0F4-D945A27746EA}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{E3C2200E-C290-4F51-A0F4-D945A27746EA}
    • NoExplorer = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C58A99D3-A64E-4A72-AEB8-E3DEF8B307EC}\TypeLib
    • Version = "1.0"

Step 6

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager
    • From: ExcludeFromKnownDlls = "usp10.dll"
      To: ExcludeFromKnownDlls = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
    • From: netsvcs = "{random characters}"
      To: netsvcs = ""{random values}""

Step 7

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%\64to32.dll
  • %Temp%\rCD1dAMy.pif
  • %Temp%\VkfZW448.pif
  • %System%\Windows32.dll

Step 8

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


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