TROJ_FAKEAV.JPY


 ALIASES:

Yontoo (Symantec); Yontoo (v) (Sunbelt)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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:

1,210,344 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

08 Nov 2012

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%\6F6C1FCC
  • %User Profile%\Application Data\Tarma Installer
  • %User Profile%\Tarma Installer\{361E80BE-388B-4270-BF54-A10C2B756504}
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Cache
  • %User Temp%\6F6C1FCC\x86
  • %User Temp%\6F6C1FCC\x64
  • %User Temp%\B69CE611
  • %User Profile%\Tarma Installer\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Cache
  • %User Temp%\B69CE611\x86
  • %User Temp%\B69CE611\x64
  • %Program Files%\Yontoo

(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.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

Autostart Technique

This Trojan registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}

Other System Modifications

This Trojan deletes the following files:

  • %Program Files%\TSR1.tmp
  • %User Profile%\Application Data\TSR2.tmp
  • %User Temp%\{malware file name}-0180.log
  • %Program Files%\TSR3.tmp
  • %User Profile%\Tarma Installer\TSR4.tmp
  • %Program Files%\TSR5.tmp
  • %User Profile%\Tarma Installer\TSR6.tmp
  • %User Temp%\B69CE611\InstallHandler.txt
  • %User Temp%\B69CE611\7za.exe
  • %User Temp%\B69CE611\Check.txt
  • %User Temp%\B69CE611\sqlite3.exe
  • %User Temp%\YontooSetup-S-07DC.log

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %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.)

It deletes the following folders:

  • %Application Data%\Local\Microsoft\Internet Explorer\iconcache

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Components\{4889CB45-FFEB-486E-8785-D034DAC2ACE6}

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Products\{361E80BE-388B-4270-BF54-A10C2B756504}

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{80922ee0-8a76-46ae-95d5-bd3c3fe0708d}

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{FE9271F2-6EFD-44b0-A826-84C829536E93}

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Ext\
PreApproved\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\{CFDAFE39-20CE-451D-BD45-A37452F39CF0}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\YontooIEClient.DLL

HKEY_CLASSES_ROOT\YontooIEClient.Api.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
YontooIEClient.Api.1\CLSID

HKEY_CLASSES_ROOT\YontooIEClient.Api

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
YontooIEClient.Api\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
YontooIEClient.Api\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}\TypeLib

HKEY_CLASSES_ROOT\YontooIEClient.Layers.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
YontooIEClient.Layers.1\CLSID

HKEY_CLASSES_ROOT\YontooIEClient.Layers

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
YontooIEClient.Layers\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
YontooIEClient.Layers\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\InProcServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\NumMethods

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}\NumMethods

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Recovery\Active

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Recovery\AdminActive

HKEY_LOCAL_MACHINE\Software\Google

HKEY_LOCAL_MACHINE\Software\Google\
Chrome

HKEY_LOCAL_MACHINE\Software\Google\
Chrome\Extensions

HKEY_LOCAL_MACHINE\Software\Google\
Chrome\Extensions\niapdbllcanepiiimjjndipklodoedlc

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Components\{9D9785E5-3424-40B6-A287-BA143AD53109}

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Components\{1A975F48-2A3C-44FE-A91C-49D3C12ED0BC}

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Components\{B6783DFA-B8C8-4CB6-AB9F-EF1A1F7F7AE8}

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Components\{9307081B-7444-494C-8CF6-2FA7C0E92BFB}

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Components\{BB1DCBF2-6F69-4FB5-BA9F-0B46B5F93395}

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Components\{8D8654CD-7FBC-4C7E-84E9-371BFA8DB04E}

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}

HKEY_LOCAL_MACHINE\Software\Tarma Installer\
Products\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Components\{4889CB45-FFEB-486E-8785-D034DAC2ACE6}
{361E80BE-388B-4270-BF54-A10C2B756504} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Products\{361E80BE-388B-4270-BF54-A10C2B756504}
TizPath = "{malware path and file name}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\YontooIEClient.DLL
AppID = "{CFDAFE39-20CE-451D-BD45-A37452F39CF0}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
NoExplorer = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\TypeLib
Version = "1.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}\TypeLib
Version = "1.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\InProcServer32
ThreadingModel = "Both"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{FE9271F2-6EFD-44b0-A826-84C829536E93}
defaultEnableAppsList = "twittube,buzzdock,YontooNewOffers"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
ApplicationTileImmersiveActivation = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
AssociationActivationMode = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Components\{9D9785E5-3424-40B6-A287-BA143AD53109}
{889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Components\{1A975F48-2A3C-44FE-A91C-49D3C12ED0BC}
{889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Components\{B6783DFA-B8C8-4CB6-AB9F-EF1A1F7F7AE8}
{889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Components\{9307081B-7444-494C-8CF6-2FA7C0E92BFB}
{889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Components\{BB1DCBF2-6F69-4FB5-BA9F-0B46B5F93395}
{889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Components\{8D8654CD-7FBC-4C7E-84E9-371BFA8DB04E}
{889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
UninstallString = "%User Profile%\{889DF~1\Setup.exe /remove /q0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
QuietUninstallString = "%User Profile%\{889DF~1\Setup.exe /remove /q"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
ModifyPath = "%User Profile%\{889DF~1\Setup.exe /q0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
Version = "1a3"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
VersionMajor = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
VersionMinor = "a"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
EstimatedSize = "49"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
Language = "49"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
TSAware = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
TinFolder = "%User Profile%\Tarma Installer\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
TinVersion = "5021"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
InstallDate = "20121108"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
InstallLocation = "%Program Files%\Yontoo"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
InstallSource = "%User Temp%"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
DisplayIcon = "%User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.ico"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
DisplayName = "Yontoo 1.10.03"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
DisplayVersion = "1.10.03"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
Publisher = "Yontoo LLC"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
URLInfoAbout = "http://www.{BLOCKED}o.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
Contact = "support@yontoo.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\
Products\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
TizPath = "%User Temp%\YontooSetup-S.exe"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
User Agent\Post Platform

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\{malware file name}-0180.exe
  • %User Temp%\6F6C1FCC.dat
  • %User Temp%\6F6C1FCC\_Setup.dll
  • %User Temp%\6F6C1FCC\Setup.ico
  • %User Temp%\6F6C1FCC\x86\regsvr32.exe
  • %User Temp%\6F6C1FCC\x64\regsvr32.exe
  • %User Temp%\YontooSetup-S.exe._tm
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Setup.dat
  • %User Temp%\YontooSetup-S-07DC.exe
  • %User Temp%\B69CE611.dat
  • %User Temp%\B69CE611\_Setup.dll
  • %User Temp%\B69CE611\Setup.ico
  • %User Temp%\B69CE611\_Setupx.dll
  • %User Temp%\B69CE611\Check.txt.tmp
  • %User Temp%\B69CE611\x86\regsvr32.exe
  • %User Temp%\B69CE611\x64\regsvr32.exe
  • %User Temp%\B69CE611\7za.exe._tm
  • %User Temp%\B69CE611\sqlite3.exe._tm
  • %User Temp%\B69CE611\YontooIEClient.dll._tm
  • %User Temp%\B69CE611\InstallHandler.txt.tmp
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.dat
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Setup.exe
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\_Setup.dll
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Setup.ico
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.exe
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\_Setup.dll
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.ico
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\_Setupx.dll
  • %Program Files%\Yontoo\YontooIEClient.dll

(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.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://service.{BLOCKED}o.com/Installer/Check/?{random characters}
  • http://service.{BLOCKED}o.com/InstallHandler.aspx?{random characters}

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Close all opened browser windows

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\Tarma Installer\Components
    • {4889CB45-FFEB-486E-8785-D034DAC2ACE6}
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Products
    • {361E80BE-388B-4270-BF54-A10C2B756504}
  • In HKEY_LOCAL_MACHINE\Software\Classes\CLSID
    • {80922ee0-8a76-46ae-95d5-bd3c3fe0708d}
  • In HKEY_LOCAL_MACHINE\Software\Classes\CLSID
    • {FE9271F2-6EFD-44b0-A826-84C829536E93}
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Ext\PreApproved
    • {DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
    • {CFDAFE39-20CE-451D-BD45-A37452F39CF0}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
    • YontooIEClient.DLL
  • In HKEY_CLASSES_ROOT
    • YontooIEClient.Api.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Api.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • YontooIEClient.Api
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Api
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Api
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
    • TypeLib
  • In HKEY_CLASSES_ROOT
    • YontooIEClient.Layers.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Layers.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • YontooIEClient.Layers
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Layers
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Layers
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {D372567D-67C1-4B29-B3F0-159B52B3E967}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {10DE7085-6A1E-4D41-A7BF-9AF93E351401}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {1AD27395-1659-4DFF-A319-2CFA243861A5}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {10DE7085-6A1E-4D41-A7BF-9AF93E351401}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}
    • InProcServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}
    • NumMethods
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}
    • NumMethods
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Recovery
    • Active
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Recovery
    • AdminActive
  • In HKEY_LOCAL_MACHINE\Software
    • Google
  • In HKEY_LOCAL_MACHINE\Software\Google
    • Chrome
  • In HKEY_LOCAL_MACHINE\Software\Google\Chrome
    • Extensions
  • In HKEY_LOCAL_MACHINE\Software\Google\Chrome\Extensions
    • niapdbllcanepiiimjjndipklodoedlc
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Components
    • {9D9785E5-3424-40B6-A287-BA143AD53109}
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Components
    • {1A975F48-2A3C-44FE-A91C-49D3C12ED0BC}
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Components
    • {B6783DFA-B8C8-4CB6-AB9F-EF1A1F7F7AE8}
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Components
    • {9307081B-7444-494C-8CF6-2FA7C0E92BFB}
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Components
    • {BB1DCBF2-6F69-4FB5-BA9F-0B46B5F93395}
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Components
    • {8D8654CD-7FBC-4C7E-84E9-371BFA8DB04E}
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B}
  • In HKEY_LOCAL_MACHINE\Software\Tarma Installer\Products
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B}

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\SOFTWARE\Tarma Installer\Components\{4889CB45-FFEB-486E-8785-D034DAC2ACE6}
    • {361E80BE-388B-4270-BF54-A10C2B756504} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Products\{361E80BE-388B-4270-BF54-A10C2B756504}
    • TizPath = "{malware path and file name}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\YontooIEClient.DLL
    • AppID = "{CFDAFE39-20CE-451D-BD45-A37452F39CF0}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
    • NoExplorer = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\TypeLib
    • Version = "1.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}\TypeLib
    • Version = "1.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}\InProcServer32
    • ThreadingModel = "Both"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FE9271F2-6EFD-44b0-A826-84C829536E93}
    • defaultEnableAppsList = "twittube,buzzdock,YontooNewOffers"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • ApplicationTileImmersiveActivation = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • AssociationActivationMode = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{9D9785E5-3424-40B6-A287-BA143AD53109}
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{1A975F48-2A3C-44FE-A91C-49D3C12ED0BC}
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{B6783DFA-B8C8-4CB6-AB9F-EF1A1F7F7AE8}
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{9307081B-7444-494C-8CF6-2FA7C0E92BFB}
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{BB1DCBF2-6F69-4FB5-BA9F-0B46B5F93395}
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{8D8654CD-7FBC-4C7E-84E9-371BFA8DB04E}
    • {889DF117-14D1-44EE-9F31-C5FB5D47F68B} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • UninstallString = "%User Profile%\{889DF~1\Setup.exe /remove /q0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • QuietUninstallString = "%User Profile%\{889DF~1\Setup.exe /remove /q"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • ModifyPath = "%User Profile%\{889DF~1\Setup.exe /q0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • Version = "1a3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • VersionMajor = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • VersionMinor = "a"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • EstimatedSize = "49"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • Language = "49"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • TSAware = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • TinFolder = "%User Profile%\Tarma Installer\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • TinVersion = "5021"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • InstallDate = "20121108"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • InstallLocation = "%Program Files%\Yontoo"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • InstallSource = "%User Temp%"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • DisplayIcon = "%User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.ico"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • DisplayName = "Yontoo 1.10.03"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • DisplayVersion = "1.10.03"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • Publisher = "Yontoo LLC"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • URLInfoAbout = "http://www.{BLOCKED}o.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • Contact = "support@yontoo.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Products\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
    • TizPath = "%User Temp%\YontooSetup-S.exe"

Step 5

Restore this modified 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\Internet Settings\Zones\3
    • From: 1609 = "0"
      To: 1609 = ""1""

Step 6

Search and delete these files

[ Learn More ]
There may be some component 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%\{malware file name}-0180.exe
  • %User Temp%\6F6C1FCC.dat
  • %User Temp%\6F6C1FCC\_Setup.dll
  • %User Temp%\6F6C1FCC\Setup.ico
  • %User Temp%\6F6C1FCC\x86\regsvr32.exe
  • %User Temp%\6F6C1FCC\x64\regsvr32.exe
  • %User Temp%\YontooSetup-S.exe._tm
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Setup.dat
  • %User Temp%\YontooSetup-S-07DC.exe
  • %User Temp%\B69CE611.dat
  • %User Temp%\B69CE611\_Setup.dll
  • %User Temp%\B69CE611\Setup.ico
  • %User Temp%\B69CE611\_Setupx.dll
  • %User Temp%\B69CE611\Check.txt.tmp
  • %User Temp%\B69CE611\x86\regsvr32.exe
  • %User Temp%\B69CE611\x64\regsvr32.exe
  • %User Temp%\B69CE611\7za.exe._tm
  • %User Temp%\B69CE611\sqlite3.exe._tm
  • %User Temp%\B69CE611\YontooIEClient.dll._tm
  • %User Temp%\B69CE611\InstallHandler.txt.tmp
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.dat
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Setup.exe
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\_Setup.dll
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Setup.ico
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.exe
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\_Setup.dll
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Setup.ico
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\_Setupx.dll
  • %Program Files%\Yontoo\YontooIEClient.dll

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%\6F6C1FCC
  • %User Profile%\Application Data\Tarma Installer
  • %User Profile%\Tarma Installer\{361E80BE-388B-4270-BF54-A10C2B756504}
  • %User Profile%\{361E80BE-388B-4270-BF54-A10C2B756504}\Cache
  • %User Temp%\6F6C1FCC\x86
  • %User Temp%\6F6C1FCC\x64
  • %User Temp%\B69CE611
  • %User Profile%\Tarma Installer\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
  • %User Profile%\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}\Cache
  • %User Temp%\B69CE611\x86
  • %User Temp%\B69CE611\x64
  • %Program Files%\Yontoo

Step 8

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

  • %Program Files%\TSR1.tmp
  • %User Profile%\Application Data\TSR2.tmp
  • %User Temp%\{malware file name}-0180.log
  • %Program Files%\TSR3.tmp
  • %User Profile%\Tarma Installer\TSR4.tmp
  • %Program Files%\TSR5.tmp
  • %User Profile%\Tarma Installer\TSR6.tmp
  • %User Temp%\B69CE611\InstallHandler.txt
  • %User Temp%\B69CE611\7za.exe
  • %User Temp%\B69CE611\Check.txt
  • %User Temp%\B69CE611\sqlite3.exe
  • %User Temp%\YontooSetup-S-07DC.log

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\Internet Settings\User Agent
    • Post Platform


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