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PUA.Win32.WinThruster.GE

April 22, 2019
 Analysis by: Arvin Roi Macaraeg
 ALIASES:

Hoax.Win32.DeceptPCClean.dfx(KASPERSKY); Misleading:Win32/Lodi(MICROSOFT)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 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 may be manually installed by a user.

  TECHNICAL DETAILS

File Size:

3,136,888 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

13 Mar 2019

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 drops the following files:

  • %User Temp%\is-2KT28.tmp\1.tmp
  • %User Temp%\is-L2AU3.tmp\InnoCallback.dll
  • %User Temp%\is-L2AU3.tmp\InnoCallback.dll
  • %Program Files%\WinThruster\is-8EI3J.tmp
  • %Program Files%\WinThruster\is-8EI3J.tmp
  • %Program Files%\WinThruster\unins000.exe
  • %Program Files%\WinThruster\is-3CFSF.tmp
  • %Program Files%\WinThruster\is-3CFSF.tmp
  • %Program Files%\WinThruster\IsLicense50.dll
  • %Program Files%\WinThruster\is-NBEAV.tmp
  • %Program Files%\WinThruster\is-NBEAV.tmp
  • %Program Files%\WinThruster\WinThruster.exe
  • %Program Files%\WinThruster\is-TEUEQ.tmp
  • %Program Files%\WinThruster\is-TEUEQ.tmp
  • %Program Files%\WinThruster\PerformanceMonitor.exe
  • %Program Files%\WinThruster\is-EFEA9.tmp
  • %Program Files%\WinThruster\is-EFEA9.tmp
  • %Program Files%\WinThruster\Updater.exe
  • %Program Files%\WinThruster\is-BD1SS.tmp
  • %Program Files%\WinThruster\is-BD1SS.tmp
  • %Program Files%\WinThruster\RPCEx.exe
  • %Program Files%\WinThruster\is-4Q184.tmp
  • %Program Files%\WinThruster\is-4Q184.tmp
  • %Program Files%\WinThruster\Local_ar.xml
  • %Program Files%\WinThruster\is-VDP7K.tmp
  • %Program Files%\WinThruster\is-VDP7K.tmp
  • %Program Files%\WinThruster\Local_cs.xml
  • %Program Files%\WinThruster\is-4U19C.tmp
  • %Program Files%\WinThruster\is-4U19C.tmp
  • %Program Files%\WinThruster\Local_da.xml
  • %Program Files%\WinThruster\is-QV279.tmp
  • %Program Files%\WinThruster\is-QV279.tmp
  • %Program Files%\WinThruster\Local_de.xml
  • %Program Files%\WinThruster\is-FGA72.tmp
  • %Program Files%\WinThruster\is-FGA72.tmp
  • %Program Files%\WinThruster\Local_el.xml
  • %Program Files%\WinThruster\is-7LAP9.tmp
  • %Program Files%\WinThruster\is-7LAP9.tmp
  • %Program Files%\WinThruster\Local_en.xml
  • %Program Files%\WinThruster\is-NJGKJ.tmp
  • %Program Files%\WinThruster\is-NJGKJ.tmp
  • %Program Files%\WinThruster\Local_es.xml
  • %Program Files%\WinThruster\is-2C4UC.tmp
  • %Program Files%\WinThruster\is-2C4UC.tmp
  • %Program Files%\WinThruster\Local_fi.xml
  • %Program Files%\WinThruster\is-BP5LG.tmp
  • %Program Files%\WinThruster\is-BP5LG.tmp
  • %Program Files%\WinThruster\Local_fr.xml
  • %Program Files%\WinThruster\is-21P8G.tmp
  • %Program Files%\WinThruster\is-21P8G.tmp
  • %Program Files%\WinThruster\Local_hu.xml
  • %Program Files%\WinThruster\is-OPJ3M.tmp
  • %Program Files%\WinThruster\is-OPJ3M.tmp
  • %Program Files%\WinThruster\Local_it.xml
  • %Program Files%\WinThruster\is-7KJOT.tmp
  • %Program Files%\WinThruster\is-7KJOT.tmp
  • %Program Files%\WinThruster\Local_ja.xml
  • %Program Files%\WinThruster\is-44S57.tmp
  • %Program Files%\WinThruster\is-44S57.tmp
  • %Program Files%\WinThruster\Local_ko.xml
  • %Program Files%\WinThruster\is-PE7E2.tmp
  • %Program Files%\WinThruster\is-PE7E2.tmp
  • %Program Files%\WinThruster\Local_nl.xml
  • %Program Files%\WinThruster\is-68EIE.tmp
  • %Program Files%\WinThruster\is-68EIE.tmp
  • %Program Files%\WinThruster\Local_no.xml
  • %Program Files%\WinThruster\is-T541L.tmp
  • %Program Files%\WinThruster\is-T541L.tmp
  • %Program Files%\WinThruster\Local_pl.xml
  • %Program Files%\WinThruster\is-0LGBU.tmp
  • %Program Files%\WinThruster\is-0LGBU.tmp
  • %Program Files%\WinThruster\Local_pt-br.xml
  • %Program Files%\WinThruster\is-AIQMM.tmp
  • %Program Files%\WinThruster\is-AIQMM.tmp
  • %Program Files%\WinThruster\Local_pt.xml
  • %Program Files%\WinThruster\is-DTM0J.tmp
  • %Program Files%\WinThruster\is-DTM0J.tmp
  • %Program Files%\WinThruster\Local_ro.xml
  • %Program Files%\WinThruster\is-N9CNB.tmp
  • %Program Files%\WinThruster\is-N9CNB.tmp
  • %Program Files%\WinThruster\local_ru.xml
  • %Program Files%\WinThruster\is-8SD3E.tmp
  • %Program Files%\WinThruster\is-8SD3E.tmp
  • %Program Files%\WinThruster\Local_sv.xml
  • %Program Files%\WinThruster\is-RO134.tmp
  • %Program Files%\WinThruster\is-RO134.tmp
  • %Program Files%\WinThruster\Local_tr.xml
  • %Program Files%\WinThruster\is-9S7HS.tmp
  • %Program Files%\WinThruster\is-9S7HS.tmp
  • %Program Files%\WinThruster\Local_zh-cn.xml
  • %Program Files%\WinThruster\is-MBSCO.tmp
  • %Program Files%\WinThruster\is-MBSCO.tmp
  • %Program Files%\WinThruster\Local_zh-tw.xml
  • %Program Files%\WinThruster\is-BOJ9E.tmp
  • %Program Files%\WinThruster\is-BOJ9E.tmp
  • %Program Files%\WinThruster\help.ico
  • %Program Files%\WinThruster\is-IEN85.tmp
  • %Program Files%\WinThruster\is-IEN85.tmp
  • %Program Files%\WinThruster\Post _Scan_Notification_English.wav
  • %Program Files%\WinThruster\is-J5AE1.tmp
  • %Program Files%\WinThruster\is-J5AE1.tmp
  • %Program Files%\WinThruster\Local.xml
  • %Desktop%\WinThruster.lnk
  • %Common Programs%\WinThruster\WinThruster.lnk
  • %Common Programs%\WinThruster\Uninstall WinThruster.lnk
  • %Program Files%\WinThruster\unins000.msg
  • %Program Files%\WinThruster\unins000.dat

(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, 7, and 8.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), 7 (32-bit), and 8 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), 7 (64-bit), and 8 (64-bit).. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista, 7, and 8.. %Common Programs% is the folder that contains common program groups for all users, which is usually C:\Documents and Settings\All Users\Start Menu\Programs on Windows 2000, XP, and Server 2003, or C:\ProgramData\Microsoft\Windows\Start Menu\Programs on Windows Vista, 7, and 8.)

Autostart Technique

This Potentially Unwanted Application adds the following lines or registry entries as part of its routine:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    Inno Setup: Setup Version = "5.5.9 (u)"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    Inno Setup: App Path = "%Program Files%\WinThruster"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    InstallLocation = "%Program Files%\WinThruster\"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    Inno Setup: Icon Group = "WinThruster"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    Inno Setup: User = "dyituser_732"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    Inno Setup: Language = "en"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    DisplayName = "WinThruster"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    DisplayIcon = "%Program Files%\WinThruster\help.ico"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    UninstallString = ""%Program Files%\WinThruster\unins000.exe""
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    QuietUninstallString = ""%Program Files%\WinThruster\unins000.exe" /SILENT"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    DisplayVersion = "1.5.6.178"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    Publisher = "Solvusoft"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    URLInfoAbout = "www.solvusoft.com"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    Contact = "www.solvusoft.com"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    NoModify = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    NoRepair = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    InstallDate = "20190419"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    MajorVersion = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    MinorVersion = "5"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    VersionMajor = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    VersionMinor = "5"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    EstimatedSize = "16467"

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

  • https://www.sol{BLOCKED}winthruster/install/

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

2.169.00

SSAPI PATTERN Date:

18 Apr 2019

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

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

Remove PUA.Win32.WinThruster.GE by using its own Uninstall option

[ Learn More ]
To uninstall the grayware process

Step 4

Search and delete this file

[ 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.
  • %User Temp%\is-2KT28.tmp\1.tmp
  • %User Temp%\is-L2AU3.tmp\InnoCallback.dll
  • %User Temp%\is-L2AU3.tmp\InnoCallback.dll

Step 5

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.WinThruster.GE. 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:


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