TROJ_FAKEAV.JPY
Yontoo (Symantec); Yontoo (v) (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
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
1,210,344 bytes
EXE
No
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
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
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
- 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
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
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""
- From: 1609 = "0"
Step 6
Search and delete these 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
Step 7
Search and delete these 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
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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