PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • 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.

  TECHNICAL DETAILS

File Size: 3,901,072 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 05 Jul 2016

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.

Installation

This Trojan creates the following folders:

  • %User Temp%\is-EGHGQ.tmp
  • %User Temp%\is-A7U3S.tmp
  • %User Temp%\is-A7U3S.tmp\_isetup
  • %Program Files%\WinThruster
  • %Start Menu%\Programs\WinThruster
  • %System Root%\Documents and Settings\Wilbert
  • %User Profile%\Application Data\Solvusoft
  • %User Profile%\Solvusoft\WinThruster

(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.. %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.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WinThrusterReminder = "%Program Files%\WinThruster\WinThruster.exe -rem"

Other System Modifications

This Trojan deletes the following files:

  • %Start Menu%\Programs\WinThruster\WinThruster.pif
  • %Start Menu%\Programs\WinThruster\WinThruster.url
  • %Start Menu%\Programs\WinThruster\Uninstall WinThruster.pif
  • %Start Menu%\Programs\WinThruster\Uninstall WinThruster.url
  • %Desktop%\WinThruster.pif
  • %Desktop%\WinThruster.url
  • %Windows%\Tasks\WinThruster.job
  • %Windows%\Tasks\WinThruster_Updates.job

(Note: %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Solvusoft\
WinThruster

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster\LANG

HKEY_LOCAL_MACHINE\Software\Solvusoft\
WinThruster\LANG

HKEY_CURRENT_USER\Software\Licenses

HKEY_CLASSES_ROOT\CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}\InProcServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}\VersionIndependentProgID

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster
utm_source = "winthruster"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster
utm_campaign = "default"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster
utm_medium = "newbuild"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster
RCPURL = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster
RENEWALURL = "{random characters}"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster
StartAutoScanPMUI = "1"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster
StartAutoScanOnLaunch = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster
StartAutoTutorial = "1"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster
TrialType = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster
MaxFixLimit = "f"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1
Inno Setup: Setup Version = "5.4.0 (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 = "Wilbert"

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\WinThruster.exe"

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 = "1.79"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1
Publisher = "solvusoft Corporation"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1
URLInfoAbout = "http://{BLOCKED}oft.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1
HelpLink = "http://{BLOCKED}oft.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 = "20151118"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1
MajorVersion = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1
MinorVersion = "4f"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster\LANG
LangCode = "en"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster\LANG
LangID = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster\LANG
LangID = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1
UninstallString = "%Program Files%\WinThruster\unins000.exe /silent"

HKEY_CURRENT_USER\Software\Licenses
{R7C0DB872A3F777C0} = "{random values}"

HKEY_CURRENT_USER\Software\Licenses
{K7C0DB872A3F777C0} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}\InProcServer32
ThreadingModel = "Both"

HKEY_CURRENT_USER\Software\Licenses
{IFFDD4A01F3D01110} = "{random values}"

HKEY_CURRENT_USER\Software\Licenses
{0FFDD4A01F3D01110} = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\
WinThruster
Expired = "0"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster
FirstRun = "1"

HKEY_CURRENT_USER\Software\Solvusoft\
WinThruster
StartAutoScanPMUI = "0"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = "3a98"

(Note: The default value data of the said registry entry is 3a98.)

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
WinThruster_is1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}\Version

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\is-eghgq.tmp\{malware file name}.tmp
  • %User Temp%\is-A7U3S.tmp\_isetup\_shfoldr.dll
  • %Program Files%\WinThruster\unins000.dat
  • %Program Files%\WinThruster\is-BPS1G.tmp
  • %Program Files%\WinThruster\is-EIJN0.tmp
  • %Program Files%\WinThruster\is-QIS8O.tmp
  • %Program Files%\WinThruster\is-9PA0N.tmp
  • %Program Files%\WinThruster\is-BQ5KO.tmp
  • %Program Files%\WinThruster\is-R6A66.tmp
  • %Program Files%\WinThruster\is-TVCVJ.tmp
  • %Program Files%\WinThruster\is-BKV9S.tmp
  • %Program Files%\WinThruster\is-ICOLK.tmp
  • %Program Files%\WinThruster\is-PVK9I.tmp
  • %Program Files%\WinThruster\is-7AMBE.tmp
  • %Program Files%\WinThruster\is-980C4.tmp
  • %Program Files%\WinThruster\is-PNP3S.tmp
  • %Program Files%\WinThruster\is-DKTVS.tmp
  • %Program Files%\WinThruster\is-QRC62.tmp
  • %Program Files%\WinThruster\is-15887.tmp
  • %Program Files%\WinThruster\is-2I639.tmp
  • %Program Files%\WinThruster\is-OKQRT.tmp
  • %Program Files%\WinThruster\is-N58D6.tmp
  • %Program Files%\WinThruster\is-05GIS.tmp
  • %Program Files%\WinThruster\is-74NRJ.tmp
  • %Program Files%\WinThruster\is-QAS4C.tmp
  • %Program Files%\WinThruster\is-T0P2J.tmp
  • %Program Files%\WinThruster\is-LSNKS.tmp
  • %Program Files%\WinThruster\is-8JTOH.tmp
  • %Program Files%\WinThruster\is-FH6K2.tmp
  • %Program Files%\WinThruster\is-83EC0.tmp
  • %Start Menu%\Programs\WinThruster\WinThruster.lnk
  • %Start Menu%\Programs\WinThruster\Uninstall WinThruster.lnk
  • %Desktop%\WinThruster.lnk
  • %Program Files%\WinThruster\unins000.msg
  • %User Temp%\is-A7U3S.tmp\roboot.exe
  • %User Profile%\WinThruster\eng_rcp.dat
  • %Windows%\Tasks\WinThruster_UPDATES.job
  • %Windows%\Tasks\WinThruster_DEFAULT.job
  • %System%\roboot.exe

(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.. %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.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %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.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}0.1
  • {BLOCKED}.56.75
  • {BLOCKED}.56.34
  • {BLOCKED}.218.138
  • {BLOCKED}1.94.208
  • {BLOCKED}.216.8
  • {BLOCKED}.216.14
  • {BLOCKED}.47.175
  • {BLOCKED}164.166

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.8

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

Restart in Safe Mode

[ Learn More ]

Step 3

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\Solvusoft
    • WinThruster
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • WinThruster_is1
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster
    • LANG
  • In HKEY_LOCAL_MACHINE\Software\Solvusoft\WinThruster
    • LANG
  • In HKEY_CURRENT_USER\Software
    • Licenses
  • In HKEY_CLASSES_ROOT\CLSID
    • {53E92080-F0A9-E162-CA8B-E9948C8D19A4}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}
    • InProcServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}
    • VersionIndependentProgID

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • WinThrusterReminder = "%Program Files%\WinThruster\WinThruster.exe -rem"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster
    • utm_source = "winthruster"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster
    • utm_campaign = "default"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster
    • utm_medium = "newbuild"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster
    • RCPURL = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster
    • RENEWALURL = "{random characters}"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster
    • StartAutoScanPMUI = "1"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster
    • StartAutoScanOnLaunch = "0"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster
    • StartAutoTutorial = "1"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster
    • TrialType = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster
    • MaxFixLimit = "f"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • Inno Setup: Setup Version = "5.4.0 (u)"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • Inno Setup: App Path = "%Program Files%\WinThruster"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • InstallLocation = "%Program Files%\WinThruster"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • Inno Setup: Icon Group = "WinThruster"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • Inno Setup: User = "Wilbert"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • Inno Setup: Language = "en"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • DisplayName = "WinThruster"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • DisplayIcon = "%Program Files%\WinThruster\WinThruster.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • UninstallString = "%Program Files%\WinThruster\unins000.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • QuietUninstallString = "%Program Files%\WinThruster\unins000.exe /SILENT"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • DisplayVersion = "1.79"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • Publisher = "solvusoft Corporation"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • URLInfoAbout = "http://{BLOCKED}oft.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • HelpLink = "http://{BLOCKED}oft.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • InstallDate = "20151118"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • MajorVersion = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • MinorVersion = "4f"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster\LANG
    • LangCode = "en"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster\LANG
    • LangID = "0"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster\LANG
    • LangID = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinThruster_is1
    • UninstallString = "%Program Files%\WinThruster\unins000.exe /silent"
  • In HKEY_CURRENT_USER\Software\Licenses
    • {R7C0DB872A3F777C0} = "{random values}"
  • In HKEY_CURRENT_USER\Software\Licenses
    • {K7C0DB872A3F777C0} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}\InProcServer32
    • ThreadingModel = "Both"
  • In HKEY_CURRENT_USER\Software\Licenses
    • {IFFDD4A01F3D01110} = "{random values}"
  • In HKEY_CURRENT_USER\Software\Licenses
    • {0FFDD4A01F3D01110} = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Solvusoft\WinThruster
    • Expired = "0"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster
    • FirstRun = "1"
  • In HKEY_CURRENT_USER\Software\Solvusoft\WinThruster
    • StartAutoScanPMUI = "0"

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\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters
    • From: TrapPollTimeMilliSecs = "3a98"
      To: TrapPollTimeMilliSecs = ""3a98""

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.
  • %User Temp%\is-eghgq.tmp\{malware file name}.tmp
  • %User Temp%\is-A7U3S.tmp\_isetup\_shfoldr.dll
  • %Program Files%\WinThruster\unins000.dat
  • %Program Files%\WinThruster\is-BPS1G.tmp
  • %Program Files%\WinThruster\is-EIJN0.tmp
  • %Program Files%\WinThruster\is-QIS8O.tmp
  • %Program Files%\WinThruster\is-9PA0N.tmp
  • %Program Files%\WinThruster\is-BQ5KO.tmp
  • %Program Files%\WinThruster\is-R6A66.tmp
  • %Program Files%\WinThruster\is-TVCVJ.tmp
  • %Program Files%\WinThruster\is-BKV9S.tmp
  • %Program Files%\WinThruster\is-ICOLK.tmp
  • %Program Files%\WinThruster\is-PVK9I.tmp
  • %Program Files%\WinThruster\is-7AMBE.tmp
  • %Program Files%\WinThruster\is-980C4.tmp
  • %Program Files%\WinThruster\is-PNP3S.tmp
  • %Program Files%\WinThruster\is-DKTVS.tmp
  • %Program Files%\WinThruster\is-QRC62.tmp
  • %Program Files%\WinThruster\is-15887.tmp
  • %Program Files%\WinThruster\is-2I639.tmp
  • %Program Files%\WinThruster\is-OKQRT.tmp
  • %Program Files%\WinThruster\is-N58D6.tmp
  • %Program Files%\WinThruster\is-05GIS.tmp
  • %Program Files%\WinThruster\is-74NRJ.tmp
  • %Program Files%\WinThruster\is-QAS4C.tmp
  • %Program Files%\WinThruster\is-T0P2J.tmp
  • %Program Files%\WinThruster\is-LSNKS.tmp
  • %Program Files%\WinThruster\is-8JTOH.tmp
  • %Program Files%\WinThruster\is-FH6K2.tmp
  • %Program Files%\WinThruster\is-83EC0.tmp
  • %Start Menu%\Programs\WinThruster\WinThruster.lnk
  • %Start Menu%\Programs\WinThruster\Uninstall WinThruster.lnk
  • %Desktop%\WinThruster.lnk
  • %Program Files%\WinThruster\unins000.msg
  • %User Temp%\is-A7U3S.tmp\roboot.exe
  • %User Profile%\WinThruster\eng_rcp.dat
  • %Windows%\Tasks\WinThruster_UPDATES.job
  • %Windows%\Tasks\WinThruster_DEFAULT.job
  • %System%\roboot.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.
  • %User Temp%\is-EGHGQ.tmp
  • %User Temp%\is-A7U3S.tmp
  • %User Temp%\is-A7U3S.tmp\_isetup
  • %Program Files%\WinThruster
  • %Start Menu%\Programs\WinThruster
  • %System Root%\Documents and Settings\Wilbert
  • %User Profile%\Application Data\Solvusoft
  • %User Profile%\Solvusoft\WinThruster

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as PUA_WinThruster. 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 9

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.

  • %Start Menu%\Programs\WinThruster\WinThruster.pif
  • %Start Menu%\Programs\WinThruster\WinThruster.url
  • %Start Menu%\Programs\WinThruster\Uninstall WinThruster.pif
  • %Start Menu%\Programs\WinThruster\Uninstall WinThruster.url
  • %Desktop%\WinThruster.pif
  • %Desktop%\WinThruster.url
  • %Windows%\Tasks\WinThruster.job
  • %Windows%\Tasks\WinThruster_Updates.job

Step 10

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • WinThruster_is1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{53E92080-F0A9-E162-CA8B-E9948C8D19A4}
    • Version


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