TROJ_STARTP.SMIJ
Trojan.ADH (Symantec); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Startpage.PPA (AVG)
Windows 2000, Windows XP, Windows Server 2003

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 disables Task Manager, Registry Editor, and Folder Options.
TECHNICAL DETAILS
163,840 bytes
EXE
No
22 Jun 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.
Other System Modifications
This Trojan deletes the following files:
- %Windows%\RegText.reg
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\ClassicStartMenu
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
HideDesktopIcons\NewStartPanel
HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}
HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\
DefaultIcon
HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\
Shell\Open(&O)
HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\
Shell\Open(&O)\Command
HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\
Shell\ÊôÐÔ(&R)\Command
HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\
ShellFolder
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Desktop\NameSpace\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}
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\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\ShellFolder
Attributes = "0"
It creates the following registry entry(ies) to disable Task Manager, Registry Tools and Folder Options:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
NoDesktopCleanupWizard = "1"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\Internet Explorer\SIGNUP\iexplore.exe
(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).)
This report is generated via an automated analysis system.
SOLUTION
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
Enable Registry Editor, Task Manager, and Folder options
Step 3
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_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
- {FF5D0589-76A7-AF11-AB16-59306CC8D88E}
- In HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}
- DefaultIcon
- In HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\Shell
- Open(&O)
- In HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\Shell\Open(&O)
- Command
- In HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\Shell\ÊôÐÔ(&R)
- Command
- In HKEY_CLASSES_ROOT\CLSID\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}
- ShellFolder
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
- {FF5D0589-76A7-AF11-AB16-59306CC8D88E}
Step 4
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\{FF5D0589-76A7-AF11-AB16-59306CC8D88E}\ShellFolder
- Attributes = "0"
Step 5
Search and delete this file
- %Program Files%\Internet Explorer\SIGNUP\iexplore.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_STARTP.SMIJ. 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.
- %Windows%\RegText.reg
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