PUA_WINTHRUSTER.GA

December 04, 2015

Analysis by: Pearl Charlaine Espejo

ALIASES:

PUA.Win32.Solvusoft.A (Baidu-International); Win32/Solvusoft.A (ESET-NOD32); PUA.Solvusoft (Ikarus)

PLATFORM:

Windows

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

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 may be manually installed by a user.

TECHNICAL DETAILS

File Size: 2,370,520 bytes

File Type: EXE

Memory Resident: No

Initial Samples Received Date: 16 Oct 2015

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.

It may be manually installed by a user.

Installation

This potentially unwanted application adds the following folders:

%System Root%\Spacekace
%User Temp%\is-{random characters}.tmp\_isetup
%User Temp%\is-{random characters}.tmp
%User Temp%\ns{random characters}.tmp
%Program Files%\FileViewPro
%Common Startup%\FileViewPro

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %Common Startup% is the system's shared Startup folder, which is usually C:\Documents and Settings\All Users\Start Menu\Programs\Startup on Windows 2000, XP, and Server 2003, and C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)

It drops the following files:

%User Temp%\is-{random characters}.tmp\FileViewPro-4.0-0.tmp
%User Temp%\is-{random characters}.tmp\_isetup\_shfoldr.dll
%User Temp%\is-{random characters}.tmp\isxdl.dll
%User Temp%\ns{random characters}.tmp\1\7-zip.dll
%User Temp%\ns{random characters}.tmp\1\7z.dll
%User Temp%\ns{random characters}.tmp\1\7z.exe
%User Temp%\ns{random characters}.tmp\1\OK
%User Temp%\ns{random characters}.tmp\1\complete-file-5.zip
%User Temp%\ns{random characters}.tmp\1\dir-5\FileViewPro-4.0-0.exe
%User Temp%\ns{random characters}.tmp\1\join-5.bat
%User Temp%\ns{random characters}.tmp\1\offer-1.html
%User Temp%\ns{random characters}.tmp\1\temp-file-part.{numbers}
%User Temp%\ns{random characters}.tmp\1\unpack-5.bat
%User Temp%\ns{random characters}.tmp\Banner.dll
%User Temp%\ns{random characters}.tmp\ButtonEvent.dll
%User Temp%\ns{random characters}.tmp\DownloadThread.dll
%User Temp%\ns{random characters}.tmp\LangDLL.dll
%User Temp%\ns{random characters}.tmp\Math.dll
%User Temp%\ns{random characters}.tmp\System.dll
%User Temp%\ns{random characters}.tmp\ThreadTimer.dll
%User Temp%\ns{random characters}.tmp\background.bmp
%User Temp%\ns{random characters}.tmp\button.bmp
%User Temp%\ns{random characters}.tmp\fileviewpro-logo.jpg
%User Temp%\ns{random characters}.tmp\inetc.dll
%User Temp%\ns{random characters}.tmp\inetc.pdb
%User Temp%\ns{random characters}.tmp\modern-wizard.bmp
%User Temp%\ns{random characters}.tmp\ns{numbers}.tmp
%User Temp%\ns{random characters}.tmp\nsArray.dll
%User Temp%\ns{random characters}.tmp\nsArray.pdb
%User Temp%\ns{random characters}.tmp\nsDialogs.dll
%User Temp%\ns{random characters}.tmp\nsExec.dll
%User Temp%\ns{random characters}.tmp\nsWeb.dll
%User Temp%\ns{random characters}.tmp\NSISdl.dll
%User Temp%\ns{random characters}.tmp\offer-5.details
%User Temp%\ns{random characters}.tmp\offers.count
%User Temp%\ns{random characters}.tmp\progress_finished.jpg
%User Temp%\ns{random characters}.tmp\progress_installation.jpg
%User Temp%\ns{random characters}.tmp\progress_softwareoptions.jpg
%User Temp%\ns{random characters}.tmp\progress_welcome.jpg
%User Temp%\ns{random characters}.tmp\sidebar-asian-384.bmp
%User Temp%\ns{random characters}.tmp\sidebar-asian.bmp
%User Temp%\ns{random characters}.tmp\sidebar-caucasian.bmp
%User Temp%\ns{random characters}.tmp\sidebar-hispanic.bmp
%User Temp%\ns{random characters}.tmp\sidebar-indian.bmp
%User Temp%\ns{random characters}.tmp\stats.response
%Desktop%\FileViewPro.lnk
%Common Startup%\FileViewPro\FileViewPro.lnk
%Common Startup%\FileViewPro\Uninstall FileViewPro.lnk
%Common Startup%\FileViewPro\Uninstall FileViewPro.lnk
%Program Files%\FileViewPro\7z\7z.dll
%Program Files%\FileViewPro\Aspose.Slides.lic
%Program Files%\FileViewPro\Be.Windows.Forms.HexBox.dll
%Program Files%\FileViewPro\Code\Extended\Patch-Mode.xshd
%Program Files%\FileViewPro\Code\Extended\Python-Mode.xshd
%Program Files%\FileViewPro\Code\Extended\SQL-Mode.xshd
%Program Files%\FileViewPro\Cursors\PanToolCursor.cur
%Program Files%\FileViewPro\Declarations.dll
%Program Files%\FileViewPro\DevExpress.Data.v12.1.dll
%Program Files%\FileViewPro\DevExpress.Data.v12.1.xml
%Program Files%\FileViewPro\DevExpress.Office.v12.1.Core.dll
%Program Files%\FileViewPro\DevExpress.Office.v12.1.Core.xml
%Program Files%\FileViewPro\DevExpress.Printing.v12.1.Core.dll
%Program Files%\FileViewPro\DevExpress.Printing.v12.1.Core.xml
%Program Files%\FileViewPro\DevExpress.RichEdit.v12.1.Core.dll
%Program Files%\FileViewPro\DevExpress.RichEdit.v12.1.Core.xml
%Program Files%\FileViewPro\DevExpress.Utils.v12.1.dll
%Program Files%\FileViewPro\DevExpress.Utils.v12.1.xml
%Program Files%\FileViewPro\DevExpress.XtraBars.v12.1.dll
%Program Files%\FileViewPro\DevExpress.XtraBars.v12.1.xml
%Program Files%\FileViewPro\DevExpress.XtraEditors.v12.1.dll
%Program Files%\FileViewPro\DevExpress.XtraEditors.v12.1.xml
%Program Files%\FileViewPro\DevExpress.XtraGrid.v12.1.dll
%Program Files%\FileViewPro\DevExpress.XtraGrid.v12.1.xml
%Program Files%\FileViewPro\DevExpress.XtraPrinting.v12.1.dll
%Program Files%\FileViewPro\DevExpress.XtraPrinting.v12.1.xml
%Program Files%\FileViewPro\DevExpress.XtraRichEdit.v12.1.Design.dll
%Program Files%\FileViewPro\DevExpress.XtraRichEdit.v12.1.Extensions.dll
%Program Files%\FileViewPro\DevExpress.XtraRichEdit.v12.1.Printing.dll
%Program Files%\FileViewPro\DevExpress.XtraRichEdit.v12.1.dll
%Program Files%\FileViewPro\DevExpress.XtraRichEdit.v12.1.xml
%Program Files%\FileViewPro\EULA_FileViewPro.rtf
%Program Files%\FileViewPro\Facebook.dll
%Program Files%\FileViewPro\FileViewPro.Common.dll
%Program Files%\FileViewPro\FileViewPro.Facebook.dll
%Program Files%\FileViewPro\FileViewPro.Licensing.dll
%Program Files%\FileViewPro\FileViewPro.Localization.dll
%Program Files%\FileViewPro\FileViewPro.Strings.3.resources
%Program Files%\FileViewPro\FileViewPro.Views.Document.dll
%Program Files%\FileViewPro\FileViewPro.Views.Media.dll
%Program Files%\FileViewPro\FileViewPro.Views.Message.dll
%Program Files%\FileViewPro\FileViewPro.Views.Mime.dll
%Program Files%\FileViewPro\FileViewPro.Views.Pdf.dll
%Program Files%\FileViewPro\FileViewPro.Views.Torrent.dll
%Program Files%\FileViewPro\FileViewPro.Views.Wpd.dll
%Program Files%\FileViewPro\FileViewPro.Views.Wps.dll
%Program Files%\FileViewPro\FileViewPro.Views.Xps.dll
%Program Files%\FileViewPro\FileViewPro.Views.dll
%Program Files%\FileViewPro\FileViewPro.exe.config
%Program Files%\FileViewPro\FileViewPro.exe
%Program Files%\FileViewPro\FileViewPro.vshost.exe.config
%Program Files%\FileViewPro\FileViewPro.vshost.exe.manifest
%Program Files%\FileViewPro\FileViewPro.vshost.exe
%Program Files%\FileViewPro\ICSharpCode.SharpZipLib.dll
%Program Files%\FileViewPro\ICSharpCode.TextEditor.dll
%Program Files%\FileViewPro\ImageView.dll
%Program Files%\FileViewPro\Implementation.dll
%Program Files%\FileViewPro\Interop.WIA.dll
%Program Files%\FileViewPro\IsLicense50.dll
%Program Files%\FileViewPro\Langs\ar.xml
%Program Files%\FileViewPro\Langs\cs.xml
%Program Files%\FileViewPro\Langs\da.xml
%Program Files%\FileViewPro\Langs\de.xml
%Program Files%\FileViewPro\Langs\el.xml
%Program Files%\FileViewPro\Langs\en-US.xml
%Program Files%\FileViewPro\Langs\en.xml
%Program Files%\FileViewPro\Langs\es.xml
%Program Files%\FileViewPro\Langs\fi.xml
%Program Files%\FileViewPro\Langs\fr.xml
%Program Files%\FileViewPro\Langs\hi.xml
%Program Files%\FileViewPro\Langs\hu.xml
%Program Files%\FileViewPro\Langs\it.xml
%Program Files%\FileViewPro\Langs\ja.xml
%Program Files%\FileViewPro\Langs\ko.xml
%Program Files%\FileViewPro\Langs\nl.xml
%Program Files%\FileViewPro\Langs\no.xml
%Program Files%\FileViewPro\Langs\pl.xml
%Program Files%\FileViewPro\Langs\pt-br.xml
%Program Files%\FileViewPro\Langs\pt-pt.xml
%Program Files%\FileViewPro\Langs\ro.xml
%Program Files%\FileViewPro\Langs\ru.xml
%Program Files%\FileViewPro\Langs\sv.xml
%Program Files%\FileViewPro\Langs\tr.xml
%Program Files%\FileViewPro\Langs\zh-cn.xml
%Program Files%\FileViewPro\Langs\zh-tw.xml
%Program Files%\FileViewPro\LibVlcWrapper.dll
%Program Files%\FileViewPro\NLog.dll
%Program Files%\FileViewPro\O2S.Components.PDFRender4NET.dll
%Program Files%\FileViewPro\O2S.Components.PDFRender4NET.xml
%Program Files%\FileViewPro\O2S.Components.PDFView4NET.dll
%Program Files%\FileViewPro\O2S.Components.PDFView4NET.xml
%Program Files%\FileViewPro\PaintDotNet.Base.dll
%Program Files%\FileViewPro\PaintDotNet.Core.dll
%Program Files%\FileViewPro\PaintDotNet.Data.dll
%Program Files%\FileViewPro\PaintDotNet.Effects.dll
%Program Files%\FileViewPro\PaintDotNet.Resources.dll
%Program Files%\FileViewPro\PaintDotNet.SystemLayer.dll
%Program Files%\FileViewPro\PaintDotNet.dll
%Program Files%\FileViewPro\PluginInstaller.exe
%Program Files%\FileViewPro\Plugins.xml
%Program Files%\FileViewPro\QlmControls.dll
%Program Files%\FileViewPro\QlmLicenseLib.dll
%Program Files%\FileViewPro\Raw\dcraw.exe
%Program Files%\FileViewPro\SDL.dll
%Program Files%\FileViewPro\SevenZipSharp.dll
%Program Files%\FileViewPro\SimplePsd.dll
%Program Files%\FileViewPro\SocialExplorer.FastDBF.dll
%Program Files%\FileViewPro\SpreadsheetGear.dll
%Program Files%\FileViewPro\SpreadsheetGear.xml
%Program Files%\FileViewPro\Svg.dll
%Program Files%\FileViewPro\System.Windows.Forms.dll
%Program Files%\FileViewPro\TorrentParser.dll
%Program Files%\FileViewPro\Wps\is-L2UQP.tmp
%Program Files%\FileViewPro\Wps\wps2html.exe
%Program Files%\FileViewPro\axvlc.dll.manifest
%Program Files%\FileViewPro\axvlc.dll
%Program Files%\FileViewPro\libvlc.dll
%Program Files%\FileViewPro\libvlccore.dll
%Program Files%\FileViewPro\licenses.licx
%Program Files%\FileViewPro\new_icon.ico
%Program Files%\FileViewPro\swscale-0.dll
%Program Files%\FileViewPro\unassoc.bat
%Program Files%\FileViewPro\unins000.dat
%Program Files%\FileViewPro\unins000.exe
%Program Files%\FileViewPro\unins000.msg
%System Root%\Spacekace\deliverysystem-log.log
%System Root%\end

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Common Startup% is the system's shared Startup folder, which is usually C:\Documents and Settings\All Users\Start Menu\Programs\Startup on Windows 2000, XP, and Server 2003, and C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

Other System Modifications

This potentially unwanted application adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Inno Setup: Setup Version = 5.5.4 (u)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Inno Setup: App Path = %PROGRAMFILES%\FileViewPro

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
InstallLocation = %PROGRAMFILES%\FileViewPro

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Inno Setup: Icon Group = FileViewPro

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Inno Setup: User = "{username}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Inno Setup: Selected Tasks = desktopicon

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Inno Setup: Deselected Tasks = quicklaunchicon

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Inno Setup: Language = "{language}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
DisplayName = FileViewPro

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
DisplayIcon = %PROGRAMFILES%\FileViewPro\FileViewPro.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
UninstallString = "%PROGRAMFILES%\FileViewPro\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
QuietUninstallString = "%PROGRAMFILES%\FileViewPro\unins000.exe" /SILENT

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
DisplayVersion = 4.0

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
Publisher = Solvusoft Corporation

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
NoModify = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
NoRepair = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
InstallDate = "{installation date}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
MajorVersion = 4

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
FileViewPro_is1
MinorVersion = 0

Other Details

This potentially unwanted application connects to the following possibly malicious URL:

http://deliverysystem.{BLOCKED}beanstalk.com/profiles//offers//option.gif?enable{letter}={value}&sid={value}&time={value}
http://www.{BLOCKED}erwizard.com/index.php?lang={value}&page=tutorial-winthruster-bw39
http://www.{BLOCKED}oft.com/file-downloads/builds/static_delivery/file_parts/fileviewpro/build_101414/FileViewPro_Build_101414.zip.{random numbers}

SOLUTION

Minimum Scan Engine: 9.800

SSAPI PATTERN File: 1.683.00

SSAPI PATTERN Date: 28 Nov 2015

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product and note files detected as PUA_WINTHRUSTER.GA

Step 4

Identify and terminate files detected as PUA_WINTHRUSTER.GA

[ Learn More ]

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.
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.
If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 5

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
- FileViewPro_is1

Step 6

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.

%User Temp%\is-{random characters}.tmp
%User Temp%\ns{random characters}.tmp
%Program Files%\FileViewPro
%Common Startup%\FileViewPro
%System Root%\Spacekace

Step 7

Search and delete these files

[ 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.

%Desktop%\FileViewPro.lnk
%System Root%\end

Step 8

Scan your computer with your Trend Micro product to delete files detected as PUA_WINTHRUSTER.GA. 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.

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