TROJ_FAKEAV.QUIN

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

Identify and terminate files detected as TROJ_FAKEAV.QUIN

1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

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\Run
  • {malware file name} = {malware path and file name}
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop
  • NoChangingWallPaper = 1
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
  • LowRiskFileTypes = {hq:/s`s:/ogn:/uyu:/dyd:/c`u:/bnl:/ble:/sdf:/lrh:/iul:/iulm:/fhg:/clq:/kqf:/`wh:/lqf:/lqdf:/lnw:/lq2:/l2t:/v`w:/rbs:
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments
  • SaveZoneInformation = 1
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
  • DisableTaskMgr = 1
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
  • NoDesktop = 1
    
• In HKEY_CURRENT_USER\Software
  • 5fa38b7-8b94-4995-ad32-52e938867954 = {blank}
    

Step 4

Restore this modified 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\Advanced
  • From: Hidden = 0
    To: Hidden = 1
    
• In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Download
  • From: CheckExeSIgnatures = no
    To: CheckExeSIgnatures = yes
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced SuperHidden
  • From: SuperHidden = 1
    To: SuperHidden = 0
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
  • From: ShowSuperHidden = 0
    To: ShowSuperHidden = 1
    
• In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\StartPage
  • From: Favorites = FF
    To: Favorites = {binary data which contains the pinned programs in the Start Menu, cannot be restored}
    

Step 5

1. Open a command prompt.
   
   • For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run. In the Search box, type CMD then press Enter.
   • For Windows Vista, Windows 7, and Windows Server 2008 users, click Start, type CMD in the Search input field then press Enter.
   • For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower-left corner of the screen, click Command Prompt.
2. In the CMD console, type the following:
   
   ATTRIB [+R | -R] [+A | -A ] [+S | -S] [+H | -H] [+I | -I] [drive:][path][file name] [/S [/D] [/L]]
   
   Where:
   + Sets an attribute.
   - Clears an attribute
   R Read-only file attribute
   A Archive file attribute
   S System file attribute
   H Hidden file attribute
   I Not content indexed file attribute
   [drive:][path][filename]
   Specifies a file or files for attrib to process
   /S Processes matching files in the current folder and all subfolders.
   /D Processes folders
   /L Work on the attributes of the Symbolic Link versus the target of the Symbolic Link
   Example:
   To unhide all files and folders (including subfolders) in drive D:
   ATTRIB –H D:\* /S /D
   
3. Repeat Step 3 for folders and files in other drives or folders.

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKEAV.QUIN. 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.

NOTES:

To Restore Files to its Original Location:

Open %User Temp%\smtmp and copy the files as follows:

If operating system major version is 5 (XP, 2000, 2003):
From: %User Temp%\smtmp\1\
To: %System Root%\Documents and Settings\All Users\Start Menu\

From: %User Temp%\smtmp\2\
To: %User Profile%\Application Data\Microsoft\Internet Explorer\Quick Launch\

From: %User Temp%\smtmp\4\
To: %System Root%\Documents and Settings\All Users\Desktop\

If operating system major version is 6 (Vista, 2008, 7)
From: %User Temp%\smtmp\1\
To: %System Root%\ProgramData\Start Menu\

From: %User Temp%\smtmp\2\
To: %User Profile%\Application Data\Roaming\Microsoft\Internet Explorer\Quick Launch\

From: %User Temp%\smtmp\3\
To: %User Profile%\Application Data\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\

From: %User Temp%\smtmp\4\
To: %System Root%\ProgramData\Desktop\

After moving the files, delete the folder %User Temp%\smtmp.