PUA.Win32.ClientInstall.A


 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Potentially Unwanted Application 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

File Size:

9,075,108 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

23 Apr 2020

Arrival Details

This Potentially Unwanted Application 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 Potentially Unwanted Application adds the following processes:

  • %User Temp%\USSEClientInstall\origSetup.exe /S /LANG=EN
  • net stop "Windows services"
  • tskill "eservices" /A
  • sc.exe delete "effsoftusse"
  • "%Windows%\SysWOW64\4097\eservices.exe" --install
  • "%Windows%\SysWOW64\4097\eservices.exe" --repairReg
  • "%Windows%\SysWOW64\4097\2008MachineIdUpgrade.exe"
  • "%System%\cscript.exe" "%User Temp%\OpenFWPort.vbs"
  • net start "Windows services"
  • %System%\net1 stop "Windows services"
  • sc.exe delete sptd
  • regsvr32.exe /s FileOpHelper.dll
  • %System%\net1 start "Windows services"
  • %Windows%\SysWOW64\4097\eservices.exe

(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It creates the following folders:

  • %Windows%\SysWOW64\4097\log
  • %Windows%\SysWOW64\4097\Res
  • %User Temp%\USSEClientInstall
  • %Windows%\SysWOW64\4097
  • %Windows%\SysWOW64\4097\langxmls
  • %Windows%\SysWOW64\4097\EndPorcessVbs
  • %Windows%\SysWOW64\4097\Styles

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

This Potentially Unwanted Application registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\USBSTFI
ImagePath = "system32\drivers\USBSTFI.SYS"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cdromf
ImagePath = "system32\drivers\cdromf.sys"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\effcrypt
ImagePath = "System32\Drivers\effscrypt.sys"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\effcrypt
ImagePath = "System32\Drivers\effscrypt.sys"

Other System Modifications

This Potentially Unwanted Application modifies the following file(s):

  • %Windows%\win.ini

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It deletes the following files:

  • %System%\autheninfoset.cfg-wal
  • %System%\drivers\a347bus.sys
  • %System%\drivers\sptd.sys
  • %System%\drivers\a347scsi.sys

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It deletes the following folders:

  • %User Temp%\nsj85A4.tmp
  • %User Temp%\nst8853.tmp

(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\Paramter
NewInstalled = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\USBSTOR
CheckFlag = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\Paramter
Stop = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\Paramter
Del = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\USSEClient
DisplayName = "USSE Client"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\USSEClient
UninstallString = "%Windows%\SysWOW64\4097\uscuninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\USSEClient
DisplayVersion = "V5"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\USSEClient
URLInfoAbout = "http://www.{BLOCKED}p.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\USSEClient
Publisher = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\USSEClient
NSIS:StartMenuDir = "USB Security Storage Expert(USSE)\Client"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Effsoft\USSEClient
(Default) = "%Windows%\SysWOW64\4097"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\{F131C1FE-0C74-42FF-8844-8FD0C91ED8F4}
(Default) = "FileOpHelper"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\FileOpHelper.DLL
AppID = "{F131C1FE-0C74-42FF-8844-8FD0C91ED8F4}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
FileOpHelper.FileOpHookStarter.1
(Default) = "FileOpHookStarter Class"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
FileOpHelper.FileOpHookStarter.1\CLSID
(Default) = "{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
FileOpHelper.FileOpHookStarter
(Default) = "FileOpHookStarter Class"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
FileOpHelper.FileOpHookStarter\CLSID
(Default) = "{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
FileOpHelper.FileOpHookStarter\CurVer
(Default) = "FileOpHelper.FileOpHookStarter.1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}
(Default) = "FileOpHookStarter Class"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\
ProgID
(Default) = "FileOpHelper.FileOpHookStarter.1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\
VersionIndependentProgID
(Default) = "FileOpHelper.FileOpHookStarter"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\
InprocServer32
(Default) = "%Windows%\SysWOW64\FileOpHelper.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\
InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}
AppID = "{F131C1FE-0C74-42FF-8844-8FD0C91ED8F4}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\
TypeLib
(Default) = "{26DE377D-89EF-41DE-B4AF-F28852F66B4C}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
explorer\ShellIconOverlayIdentifiers\Files
(Default) = "{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\Paramter
Stop = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\Paramter
Del = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\USBSTOR
CheckFlag = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\USBSTFI
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\USBSTFI
Start = "3"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\USBSTFI
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\CLASS\{36FC9E60-C465-11CF-8056-444553540000}
LowerFilters = "\x00"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\CLASS\{25DBCE51-6C8F-4A72-8A6D-B54C2B4FC835}
LowerFilters = "\x00"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cdromf
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cdromf
Start = "3"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\cdromf
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\CLASS\{4D36E965-E325-11CE-BFC1-08002BE10318}
LowerFilters = "\x00"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
NoCDBurning = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Run
USSEClientTray = "%Windows%\SysWOW64\4097\USSEPE.exe HIDE"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}
(Default) = "IFileOpHookStarter"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}\
ProxyStubClsid32
(Default) = "{00020424-0000-0000-C000-000000000046}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}\
TypeLib
(Default) = "{26DE377D-89EF-41DE-B4AF-F28852F66B4C}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}\
TypeLib
Version = "1.0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\effcrypt
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\effcrypt
Start = "3"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\effcrypt
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\effcrypt
DisplayName = "effcrypt"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\effcrypt
WOW64 = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\Paramter
ID-P = "a0a59a6e34358581cbcc721b83e77b7710001"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\effcrypt
DisplayName = "effcrypt"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\effcrypt
Start = "SERVICE_DEMAND_START"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\SESSION MANAGER\Environment
PATH = "{random characters}"

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

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
NoCDBurning = "1"

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Paramter\Uninstalled

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\USBSTFI\AutorunsDisabled

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\USBSTFI\ErrorControl

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\USBSTFI\ImagePath

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\USBSTFI\Start

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\USBSTFI\Type

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\cdromf\AutorunsDisabled

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\cdromf\ErrorControl

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\cdromf\ImagePath

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\cdromf\Start

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\cdromf\Type

Dropping Routine

This Potentially Unwanted Application drops the following files:

  • %Windows%\SysWOW64\4097\settings.ini
  • %Windows%\SysWOW64\4097\HWContrl64.dll
  • %Windows%\SysWOW64\4097\eservices.exe.new
  • %System%\autheninfoset.cfg
  • %Windows%\SysWOW64\4097\Res\ClientUI login page.bmp
  • %Windows%\SysWOW64\4097\langxmls\Sample Chinese.lng.xml
  • %Windows%\SysWOW64\4097\langxmls\English.lng.xml
  • %Windows%\SysWOW64\4097\USSEPE.exe
  • %Windows%\SysWOW64\4097\common.dll
  • %Windows%\SysWOW64\4097\Styles\Office2007.cjstyles
  • %Windows%\SysWOW64\4097\uscuninstall.exe
  • %Windows%\SysWOW64\4097\Open.exe
  • %System%\drivers\a347scsi.sys.bak
  • %Windows%\SysWOW64\4097\Sqlite3.dll.new
  • %User Temp%\USSEClientInstall\origSetup.exe
  • %Windows%\SysWOW64\4097\langxmls\Tradition Chinese.lng.xml
  • %Windows%\SysWOW64\4097\log\client.log
  • %Windows%\SysWOW64\FilesystemExtHook64.dll.new
  • %Windows%\SysWOW64\4097\updater.exe.new
  • %Windows%\SysWOW64\GdiPlus.dll
  • %Windows%\SysWOW64\4097\USSEPE.exe.new
  • %Windows%\SysWOW64\4097\Res\Client_welcome_bg.bmp
  • %Windows%\SysWOW64\4097\LiteUnzip.dll
  • %Windows%\SysWOW64\4097\ClientNetCfg.ini
  • %System%\drivers\a347bus.sys.bak
  • %Windows%\SysWOW64\xmllite.dll
  • %System%\drivers\sptd.sys.bak
  • %Windows%\SysWOW64\4097\langxmls\Japanese.lng.xml
  • %Windows%\SysWOW64\4097\effsoftCrashRpt.dll
  • %User Temp%\OpenFWPort.vbs
  • %Windows%\SysWOW64\4097\DrvInterface.dll
  • %Windows%\SysWOW64\4097\LiteZip.dll
  • %Windows%\SysWOW64\4097\StartupAppOrService.exe
  • %Windows%\SysWOW64\FilesystemExtHook64.dll
  • %Windows%\SysWOW64\4097\taskmgr.exe
  • %Windows%\SysWOW64\4097\service.dll
  • %Windows%\SysWOW64\4097\usseDriver64.sys
  • %Windows%\SysWOW64\4097\service.dll.new
  • %Windows%\SysWOW64\4097\usseDriver32.sys
  • %Windows%\SysWOW64\4097\eServices64.exe
  • %Windows%\SysWOW64\4097\updater.exe
  • %Windows%\SysWOW64\4097\eservices.exe
  • %User Temp%\USSEClientInstall\SilentCfg.ini
  • %User Temp%\USSEClientInstall\ClientNetCfg.ini
  • %Windows%\SysWOW64\FileOpHelper.dll
  • %Windows%\SysWOW64\FileOpHelper.dll.new
  • %Windows%\SysWOW64\4097\Sqlite3.dll
  • %Windows%\SysWOW64\4097\InstallClient.bat
  • %Windows%\SysWOW64\FilesystemExtHook.dll
  • %Windows%\SysWOW64\4097\dbghelp.dll
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\USB Security Storage Expert(USSE)\Client\xe5\x8d\xb8\xe8\xbd\xbd.lnk
  • %Windows%\SysWOW64\FilesystemExtHook.dll.new
  • %Windows%\SysWOW64\4097\AppOrServicesCfg.ini
  • %Windows%\SysWOW64\4097\DrvInterface.dll.new
  • %Windows%\SysWOW64\4097\UsseCryptDisk.exe

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Identify and terminate files detected as PUA.Win32.ClientInstall.A

[ Learn More ]
  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

Enable Registry Editor, Task Manager, and Folder options

[ Learn More ]
By doing this step, you also enable other applications/programs disabled by this malware/grayware/spyware. Screen reader support enabled.

Step 4

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\CurrentControlSet\services\Paramter
    • NewInstalled = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\USBSTOR
    • CheckFlag = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Paramter
    • Stop = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Paramter
    • Del = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\USSEClient
    • DisplayName = "USSE Client"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\USSEClient
    • UninstallString = "%Windows%\SysWOW64\4097\uscuninstall.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\USSEClient
    • DisplayVersion = "V5"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\USSEClient
    • URLInfoAbout = "http://www.{BLOCKED}p.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\USSEClient
    • Publisher = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\USSEClient
    • NSIS:StartMenuDir = "USB Security Storage Expert(USSE)\Client"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Effsoft\USSEClient
    • (Default) = "%Windows%\SysWOW64\4097"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{F131C1FE-0C74-42FF-8844-8FD0C91ED8F4}
    • (Default) = "FileOpHelper"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\FileOpHelper.DLL
    • AppID = "{F131C1FE-0C74-42FF-8844-8FD0C91ED8F4}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FileOpHelper.FileOpHookStarter.1
    • (Default) = "FileOpHookStarter Class"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FileOpHelper.FileOpHookStarter.1\CLSID
    • (Default) = "{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FileOpHelper.FileOpHookStarter
    • (Default) = "FileOpHookStarter Class"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FileOpHelper.FileOpHookStarter\CLSID
    • (Default) = "{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FileOpHelper.FileOpHookStarter\CurVer
    • (Default) = "FileOpHelper.FileOpHookStarter.1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}
    • (Default) = "FileOpHookStarter Class"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\ProgID
    • (Default) = "FileOpHelper.FileOpHookStarter.1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\VersionIndependentProgID
    • (Default) = "FileOpHelper.FileOpHookStarter"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\InprocServer32
    • (Default) = "%Windows%\SysWOW64\FileOpHelper.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}
    • AppID = "{F131C1FE-0C74-42FF-8844-8FD0C91ED8F4}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}\TypeLib
    • (Default) = "{26DE377D-89EF-41DE-B4AF-F28852F66B4C}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\ShellIconOverlayIdentifiers\Files
    • (Default) = "{D31C7A37-5D78-4BCE-80E4-38721AE1A5A2}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Paramter
    • Stop = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Paramter
    • Del = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\USBSTOR
    • CheckFlag = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\USBSTFI
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\USBSTFI
    • Start = "3"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\USBSTFI
    • Type = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\CLASS\{36FC9E60-C465-11CF-8056-444553540000}
    • LowerFilters = "\x00"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\CLASS\{25DBCE51-6C8F-4A72-8A6D-B54C2B4FC835}
    • LowerFilters = "\x00"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\cdromf
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\cdromf
    • Start = "3"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\cdromf
    • Type = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\CLASS\{4D36E965-E325-11CE-BFC1-08002BE10318}
    • LowerFilters = "\x00"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer
    • NoCDBurning = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run
    • USSEClientTray = "%Windows%\SysWOW64\4097\USSEPE.exe HIDE"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}
    • (Default) = "IFileOpHookStarter"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}\ProxyStubClsid32
    • (Default) = "{00020424-0000-0000-C000-000000000046}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}\TypeLib
    • (Default) = "{26DE377D-89EF-41DE-B4AF-F28852F66B4C}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{8EFC8718-DC7A-4503-8482-3D00D00328CB}\TypeLib
    • Version = "1.0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\effcrypt
    • Type = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\effcrypt
    • Start = "3"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\effcrypt
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\effcrypt
    • DisplayName = "effcrypt"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\effcrypt
    • WOW64 = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Paramter
    • ID-P = "a0a59a6e34358581cbcc721b83e77b7710001"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\effcrypt
    • DisplayName = "effcrypt"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\effcrypt
    • Start = "SERVICE_DEMAND_START"

Step 5

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\Environment
    • From: PATH = "{random characters}"
      To: PATH = ""{random values}""

Step 6

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.
  • %Windows%\SysWOW64\4097\settings.ini
  • %Windows%\SysWOW64\4097\HWContrl64.dll
  • %Windows%\SysWOW64\4097\eservices.exe.new
  • %System%\autheninfoset.cfg
  • %Windows%\SysWOW64\4097\Res\ClientUI login page.bmp
  • %Windows%\SysWOW64\4097\langxmls\Sample Chinese.lng.xml
  • %Windows%\SysWOW64\4097\langxmls\English.lng.xml
  • %Windows%\SysWOW64\4097\USSEPE.exe
  • %Windows%\SysWOW64\4097\common.dll
  • %Windows%\SysWOW64\4097\Styles\Office2007.cjstyles
  • %Windows%\SysWOW64\4097\uscuninstall.exe
  • %Windows%\SysWOW64\4097\Open.exe
  • %System%\drivers\a347scsi.sys.bak
  • %Windows%\SysWOW64\4097\Sqlite3.dll.new
  • %User Temp%\USSEClientInstall\origSetup.exe
  • %Windows%\SysWOW64\4097\langxmls\Tradition Chinese.lng.xml
  • %Windows%\SysWOW64\4097\log\client.log
  • %Windows%\SysWOW64\FilesystemExtHook64.dll.new
  • %Windows%\SysWOW64\4097\updater.exe.new
  • %Windows%\SysWOW64\GdiPlus.dll
  • %Windows%\SysWOW64\4097\USSEPE.exe.new
  • %Windows%\SysWOW64\4097\Res\Client_welcome_bg.bmp
  • %Windows%\SysWOW64\4097\LiteUnzip.dll
  • %Windows%\SysWOW64\4097\ClientNetCfg.ini
  • %System%\drivers\a347bus.sys.bak
  • %Windows%\SysWOW64\xmllite.dll
  • %System%\drivers\sptd.sys.bak
  • %Windows%\SysWOW64\4097\langxmls\Japanese.lng.xml
  • %Windows%\SysWOW64\4097\effsoftCrashRpt.dll
  • %User Temp%\OpenFWPort.vbs
  • %Windows%\SysWOW64\4097\DrvInterface.dll
  • %Windows%\SysWOW64\4097\LiteZip.dll
  • %Windows%\SysWOW64\4097\StartupAppOrService.exe
  • %Windows%\SysWOW64\FilesystemExtHook64.dll
  • %Windows%\SysWOW64\4097\taskmgr.exe
  • %Windows%\SysWOW64\4097\service.dll
  • %Windows%\SysWOW64\4097\usseDriver64.sys
  • %Windows%\SysWOW64\4097\service.dll.new
  • %Windows%\SysWOW64\4097\usseDriver32.sys
  • %Windows%\SysWOW64\4097\eServices64.exe
  • %Windows%\SysWOW64\4097\updater.exe
  • %Windows%\SysWOW64\4097\eservices.exe
  • %User Temp%\USSEClientInstall\SilentCfg.ini
  • %User Temp%\USSEClientInstall\ClientNetCfg.ini
  • %Windows%\SysWOW64\FileOpHelper.dll
  • %Windows%\SysWOW64\FileOpHelper.dll.new
  • %Windows%\SysWOW64\4097\Sqlite3.dll
  • %Windows%\SysWOW64\4097\InstallClient.bat
  • %Windows%\SysWOW64\FilesystemExtHook.dll
  • %Windows%\SysWOW64\4097\dbghelp.dll
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\USB Security Storage Expert(USSE)\Client\xe5\x8d\xb8\xe8\xbd\xbd.lnk
  • %Windows%\SysWOW64\FilesystemExtHook.dll.new
  • %Windows%\SysWOW64\4097\AppOrServicesCfg.ini
  • %Windows%\SysWOW64\4097\DrvInterface.dll.new
  • %Windows%\SysWOW64\4097\UsseCryptDisk.exe

Step 7

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Windows%\SysWOW64\4097\log
  • %Windows%\SysWOW64\4097\Res
  • %User Temp%\USSEClientInstall
  • %Windows%\SysWOW64\4097
  • %Windows%\SysWOW64\4097\langxmls
  • %Windows%\SysWOW64\4097\EndPorcessVbs
  • %Windows%\SysWOW64\4097\Styles

Step 8

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.ClientInstall.A. 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 the following Trend Micro Support pages for more information:

Step 9

Restore deleted/modified files and/or registry entries from backup

*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

    • %Windows%\win.ini

Step 10

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.

  • %System%\autheninfoset.cfg-wal
  • %System%\drivers\a347bus.sys
  • %System%\drivers\sptd.sys
  • %System%\drivers\a347scsi.sys

Step 11

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\Paramter
    • Uninstalled
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\USBSTFI
    • AutorunsDisabled
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\USBSTFI
    • ErrorControl
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\USBSTFI
    • ImagePath
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\USBSTFI
    • Start
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\USBSTFI
    • Type
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\cdromf
    • AutorunsDisabled
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\cdromf
    • ErrorControl
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\cdromf
    • ImagePath
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\cdromf
    • Start
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\cdromf
    • Type


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