TROJ_CLIBGOB.SMI


 ALIASES:

TrojanDropper:Win32/Clibgov.A (Microsoft); Generic Dropper!dtk (McAfee); Adware.Links, VBS.StartPage (Symantec); Trojan-Downloader.Win32.VB.zeo (Kaspersky); Gen:Trojan.Heur.VP.fm0@aK@6m3ib (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:

86,016 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

23 Nov 2011

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.

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\ie.reg

(Note: %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.)

It adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}\
shellex

HKEY_CLASSES_ROOT\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}\
shellex\ContextMenuHandlers

HKEY_CLASSES_ROOT\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}\
shellex\ContextMenuHandlers\ieframe

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\
InProcServer32

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\
Instance

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\
Instance\InitPropertyBag

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\
shellex

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\
shellex\ContextMenuHandlers

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\
shellex\ContextMenuHandlers\{1f4de370-ba4f-11d1-d627-00a0c91eedba}

HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\
shellex\MayChangeDefaultMenu

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
DefaultIcon

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
Shell

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
Shell\Open(&O)

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
Shell\Open(&O)\Command

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
Shell\ÊôÐÔ(&R)

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
Shell\ÊôÐÔ(&R)\Command

HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
ShellFolder

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\DefaultIcon

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\
Open(&O)

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\
Open(&O)\Command

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\
ÊôÐÔ(&R)

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\
ÊôÐÔ(&R)\Command

HKEY_CURRENT_USER\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\ShellFolder

HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{C42EB5A1-0EED-E549-91B0-775852013521}

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
ITBar7Layout = {random values}

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
ITBarLayout = {random values}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}
InfoTip = "ÌØÂô"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\InProcServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance
CLSID = "{3f454f0e-42ae-4d7c-8ea3-328250d6e272}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\
InitPropertyBag
CLSID = "{13709620-C279-11CE-A49E-444553540000}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\
InitPropertyBag
command = "´ò¿ª(&O)"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\
InitPropertyBag
method = "ShellExecute"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\
InitPropertyBag
Param1 = "http://%77%77%77%2e%31%39%38%33%30%39%2e%63%6f%6d"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\
InitPropertyBag
Param2 = "%ProgramFiles%\Internet Explorer\iexplore.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\ShellFolder
Attributes = a

HKEY_CURRENT_USER\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\
ShellFolder
Attributes = a

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}
LocalizedString = "Internet Explorer"

(Note: The default value data of the said registry entry is @%SystemRoot%\system32\SHELL32.dll,-30521.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}\InProcServer32
ThreadingModel = "Apartment"

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

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\360safe.vbs

(Note: %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.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

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

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_CLASSES_ROOT\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}
    • shellex
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}\shellex
    • ContextMenuHandlers
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}\shellex\ContextMenuHandlers
    • ieframe
  • In HKEY_CLASSES_ROOT\CLSID
    • {1f4de370-ba4f-11d1-d627-00a0c91eedba}
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}
    • InProcServer32
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}
    • Instance
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance
    • InitPropertyBag
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}
    • shellex
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\shellex
    • ContextMenuHandlers
  • In HKEY_CLASSES_ROOT\CLSID\shellex\ContextMenuHandlers
    • {1f4de370-ba4f-11d1-d627-00a0c91eedba}
  • In HKEY_CLASSES_ROOT\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\shellex
    • MayChangeDefaultMenu
  • In HKEY_CLASSES_ROOT\CLSID
    • {C42EB5A1-0EED-E549-91B0-775852013521}
  • In HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}
    • DefaultIcon
  • In HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}
    • Shell
  • In HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell
    • Open(&O)
  • In HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\Open(&O)
    • Command
  • In HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell
    • ÊôÐÔ(&R)
  • In HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\ÊôÐÔ(&R)
    • Command
  • In HKEY_CLASSES_ROOT\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}
    • ShellFolder
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID
    • {C42EB5A1-0EED-E549-91B0-775852013521}
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}
    • DefaultIcon
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}
    • Shell
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell
    • Open(&O)
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\Open(&O)
    • Command
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell
    • ÊôÐÔ(&R)
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\Shell\ÊôÐÔ(&R)
    • Command
  • In HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}
    • ShellFolder
  • In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
    • {C42EB5A1-0EED-E549-91B0-775852013521}

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_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • ITBar7Layout={random values}
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • ITBarLayout={random values}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}
    • InfoTip="ÌØÂô"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\InProcServer32
    • ThreadingModel="Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance
    • CLSID="{3f454f0e-42ae-4d7c-8ea3-328250d6e272}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\InitPropertyBag
    • CLSID="{13709620-C279-11CE-A49E-444553540000}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\InitPropertyBag
    • command="´ò¿ª(&O)"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\InitPropertyBag
    • method="ShellExecute"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\InitPropertyBag
    • Param1="http://%77%77%77%2e%31%39%38%33%30%39%2e%63%6f%6d"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-ba4f-11d1-d627-00a0c91eedba}\Instance\InitPropertyBag
    • Param2="%ProgramFiles%\Internet Explorer\iexplore.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\ShellFolder
    • Attributes=a
  • In HKEY_CURRENT_USER\CLSID\{C42EB5A1-0EED-E549-91B0-775852013521}\ShellFolder
    • Attributes=a

Step 4

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\SOFTWARE\Classes\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}
    • From: LocalizedString="Internet Explorer"
      To: LocalizedString=@%SystemRoot%\system32\SHELL32.dll,-30521
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1f4de370-d627-11d1-ba4f-00a0c91eedba}\InProcServer32
    • From: ThreadingModel="Apartment"
      To: ThreadingModel=Apartment

Step 5

Search and delete this file

[ Learn More ]
There may be some 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. %User Temp%\360safe.vbs

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_CLIBGOB.SMI. 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. %User Temp%\ie.reg


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