TROJ_GORIADU.SMF
ERROR (Microsoft); ERROR (McAfee); Trojan.Gen (Symantec); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Generic19.QOD (AVG)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
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:
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsm7.tmp
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %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 System Modifications
This Trojan deletes the following files:
- %User Temp%\nsu1.tmp
- %User Temp%\nsw5.tmp
- %User Temp%\nsm7.tmp
- %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnk
- %Start Menu%\Programs\Internet Explorer.lnk
(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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\WinSmsWallMail8
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\ClassicStartMenu
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
DefaultIcon
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
InProcServer32
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
shell
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
shell\OpenHomePage
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
shell\OpenHomePage\Command
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
shell\ÊôÐÔ(&R)
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
shell\ÊôÐÔ(&R)\Command
HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\
ShellFolder
It adds the following registry entries:
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\
CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
InfoTip = "@shdoclc.dll,-881"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
LocalizedString = "@shdoclc.dll,-880"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\InProcServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\shell\
OpenHomePage
MUIVerb = "@shdoclc.dll,-10241"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\ShellFolder
Attributes = "0"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\tohome.exe
- %User Temp%\ilbtools.dll
- %User Temp%\nsm7.tmp\System.dll
- %User Temp%\nsm7.tmp\nsRandom.dll
- %User Temp%\nsm7.tmp\AccessControl.dll
- %User Temp%\nsm7.tmp\NSISArray.dll
- %User Profile%\Quick Launch\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
(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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
This report is generated via an automated analysis system.
SOLUTION
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
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
- WinSmsWallMail8
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
- ClassicStartMenu
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\HideDesktopIcons
- NewStartPanel
- In HKEY_CLASSES_ROOT\CLSID
- {3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
- DefaultIcon
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
- InProcServer32
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
- shell
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\shell
- OpenHomePage
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\shell\OpenHomePage
- Command
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\shell
- ÊôÐÔ(&R)
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\shell\ÊôÐÔ(&R)
- Command
- In HKEY_CLASSES_ROOT\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
- ShellFolder
Step 3
Delete this registry value
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\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\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
- InfoTip = "@shdoclc.dll,-881"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}
- LocalizedString = "@shdoclc.dll,-880"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\InProcServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\shell\OpenHomePage
- MUIVerb = "@shdoclc.dll,-10241"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{3B8F65F1-4A2F-4834-B31A-62AAFA7132BC}\ShellFolder
- Attributes = "0"
Step 4
Search and delete these components
- %User Temp%\tohome.exe
- %User Temp%\ilbtools.dll
- %User Temp%\nsm7.tmp\System.dll
- %User Temp%\nsm7.tmp\nsRandom.dll
- %User Temp%\nsm7.tmp\AccessControl.dll
- %User Temp%\nsm7.tmp\NSISArray.dll
- %User Profile%\Quick Launch\Æô¶¯ Internet Explorer ä¯ÀÀÆ÷.lnk
Step 5
Search and delete these folders
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsm7.tmp
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_GORIADU.SMF. 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%\nsu1.tmp
- %User Temp%\nsw5.tmp
- %User Temp%\nsm7.tmp
- %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnk
- %Start Menu%\Programs\Internet Explorer.lnk
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