TROJ_STARTPA.SMX
Trojan:Win32/Startpage.IX (Microsoft); StartPage-DU (McAfee); Adware.MainSearch (Symantec); Trojan-Dropper.Win32.Small.hx (Kaspersky); Trojan-Downloader.Win32.Femad.gen (fs) (Sunbelt); Dropped:BAT.AutoDelete.A (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Tipo de malware
Trojan
Destructivo?
No
Cifrado
In the Wild:
Sí
Resumen y descripción
Detalles técnicos
Técnica de inicio automático
Se registra como BHO para garantizar su ejecución automática cada vez que se utilice Internet Explorer mediante la introducción de las siguientes claves de registro:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{78A54B3D-BF67-4C77-8D93-E506E211D2C0}
Otras modificaciones del sistema
Agrega las siguientes entradas de registro como parte de la rutina de instalación:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
SearchAssistant Uninstall
HKEY_CLASSES_ROOT\CLSID\{607187DF-F836-4262-AC3A-FF3244C89825}\
InProcServer32
HKEY_CLASSES_ROOT\PROTOCOLS\Filter\
text/html
HKEY_CLASSES_ROOT\PROTOCOLS\Filter\
text/plain
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Search
HKEY_CLASSES_ROOT\CLSID\{78A54B3D-BF67-4C77-8D93-E506E211D2C0}\
InProcServer32
Agrega las siguientes entradas de registro:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
SearchAssistant Uninstall
DisplayName = "Search Assistant Uninstall"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
SearchAssistant Uninstall
UninstallString = "regsvr32 /s /u %System%\ckdka.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{607187DF-F836-4262-AC3A-FF3244C89825}\InProcServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PROTOCOLS\Filter\text/html
CLSID = "{607187DF-F836-4262-AC3A-FF3244C89825}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PROTOCOLS\Filter\text/plain
CLSID = "{607187DF-F836-4262-AC3A-FF3244C89825}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
HOMEOldSP = "about:blank"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Search Bar = "file://%User Temp%\sp.html"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Use Search Asst = "no"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Use Custom Search URL = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Search
SearchAssistant = "file://%User Temp%\sp.html"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
HOMEOldSP = "about:blank"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Search Bar = "file://%User Temp%\sp.html"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Use Search Asst = "no"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Use Custom Search URL = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{78A54B3D-BF67-4C77-8D93-E506E211D2C0}\InProcServer32
ThreadingModel = "Apartment"
Modifica las siguientes entradas de registro:
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "about:blank"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome.)
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Search Page = "file://%User Temp%\sp.html"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Start Page = "about:blank"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd={SUB_PRD}&clcid={SUB_CLSID}&pver={SUB_PVER}&ar=home.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Main
Search Page = "file://%User Temp%\sp.html"
(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Search
SearchAssistant = "file://%User Temp%\sp.html"
(Note: The default value data of the said registry entry is http://ie.search.msn.com/{SUB_RFC1766}/srchasst/srchasst.htm.)
Rutina de infiltración
Infiltra los archivos siguientes:
- %System%\ckdka.dll
- %User Temp%\sp.html
- %System%\hlpbjba.dll
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\jquery-ui-1.8.custom.min[1].js
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\table_bottom3[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\footer00[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\edit_icon_thumb[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\box04[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\sandbox[1].css
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\box03[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\config[1].gif
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\10[1].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\report_image[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\overlib[1].js
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\box02[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\top_left3[1].png
- %Temporary Internet Files%\Content.IE5\2TPM8950\10[1].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\table_right3[1].png
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\bottom_left3[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\table_top3[1].png
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\bottom_right3[1].png
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\box07[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[5].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\header02[1].jpg
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\16[1].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\CalendarPopup[1].js
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\table_left3[1].png
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\top_right3[1].png
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\users[1].png
- %Temporary Internet Files%\Content.IE5\2TPM8950\header00b[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\jquery.jeditable.mini[1].js
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\box09[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\delete_icon_thumb[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\transpix[1].gif
- %Temporary Internet Files%\Content.IE5\2TPM8950\box08[1].gif
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\import[1].png
- %Temporary Internet Files%\Content.IE5\2TPM8950\box01[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\sunbeltlabs_logo[1].jpg
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\background[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\dropdown[1].jpg
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\box06[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\jquery-1.4.2.min[1].js
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\10[1].htm
(Nota: %System% es la carpeta del sistema de Windows, que en el caso de Windows 98 y ME suele estar en C:\Windows\System, en el caso de Windows NT y 2000 en C:\WINNT\System32 y en el caso de Windows XP y Server 2003 en C:\Windows\System32).
. %User Temp% es la carpeta Temp del usuario activo, que en el caso de Windows 2000, XP y Server 2003 suele estar en C:\Documents and Settings\{nombre de usuario}\Local Settings\Temp).)
Soluciones
Step 1
Los usuarios de Windows ME y XP, antes de llevar a cabo cualquier exploración, deben comprobar que tienen desactivada la opción Restaurar sistema para permitir la exploración completa del equipo.
Step 2
Cierre todas las ventanas abiertas del explorador.
Step 3
Eliminar esta clave del Registro
Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
- SearchAssistant Uninstall
- In HKEY_CLASSES_ROOT\CLSID\{607187DF-F836-4262-AC3A-FF3244C89825}
- InProcServer32
- In HKEY_CLASSES_ROOT\PROTOCOLS\Filter
- text/html
- In HKEY_CLASSES_ROOT\PROTOCOLS\Filter
- text/plain
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
- Search
- In HKEY_CLASSES_ROOT\CLSID\{78A54B3D-BF67-4C77-8D93-E506E211D2C0}
- InProcServer32
Step 4
Eliminar este valor del Registro
Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SearchAssistant Uninstall
- DisplayName = "Search Assistant Uninstall"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SearchAssistant Uninstall
- UninstallString = "regsvr32 /s /u %System%\ckdka.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{607187DF-F836-4262-AC3A-FF3244C89825}\InProcServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html
- CLSID = "{607187DF-F836-4262-AC3A-FF3244C89825}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/plain
- CLSID = "{607187DF-F836-4262-AC3A-FF3244C89825}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- HOMEOldSP = "about:blank"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- Search Bar = "file://%User Temp%\sp.html"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- Use Search Asst = "no"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- Use Custom Search URL = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Search
- SearchAssistant = "file://%User Temp%\sp.html"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- HOMEOldSP = "about:blank"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- Search Bar = "file://%User Temp%\sp.html"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- Use Search Asst = "no"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- Use Custom Search URL = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{78A54B3D-BF67-4C77-8D93-E506E211D2C0}\InProcServer32
- ThreadingModel = "Apartment"
Step 5
Restaurar este valor del Registro modificado
Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- From: Start Page = "about:blank"
To: Start Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome""
- From: Start Page = "about:blank"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
- From: Search Page = "file://%User Temp%\sp.html"
To: Search Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch""
- From: Search Page = "file://%User Temp%\sp.html"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- From: Start Page = "about:blank"
To: Start Page = ""http://www.microsoft.com/isapi/redir.dll?prd={SUB_PRD}&clcid={SUB_CLSID}&pver={SUB_PVER}&ar=home""
- From: Start Page = "about:blank"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main
- From: Search Page = "file://%User Temp%\sp.html"
To: Search Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&ar=iesearch""
- From: Search Page = "file://%User Temp%\sp.html"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Search
- From: SearchAssistant = "file://%User Temp%\sp.html"
To: SearchAssistant = ""http://ie.search.msn.com/{SUB_RFC1766}/srchasst/srchasst.htm""
- From: SearchAssistant = "file://%User Temp%\sp.html"
Step 6
Buscar y eliminar estos archivos
- %System%\ckdka.dll
- %User Temp%\sp.html
- %System%\hlpbjba.dll
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\jquery-ui-1.8.custom.min[1].js
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\table_bottom3[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\footer00[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\edit_icon_thumb[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\box04[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\sandbox[1].css
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\box03[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\config[1].gif
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\10[1].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\report_image[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\overlib[1].js
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\box02[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\top_left3[1].png
- %Temporary Internet Files%\Content.IE5\2TPM8950\10[1].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\table_right3[1].png
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\bottom_left3[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\table_top3[1].png
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\bottom_right3[1].png
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\box07[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[5].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\header02[1].jpg
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\16[1].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\CalendarPopup[1].js
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\table_left3[1].png
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\top_right3[1].png
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[4].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\users[1].png
- %Temporary Internet Files%\Content.IE5\2TPM8950\header00b[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\jquery.jeditable.mini[1].js
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\box09[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\delete_icon_thumb[1].png
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\transpix[1].gif
- %Temporary Internet Files%\Content.IE5\2TPM8950\box08[1].gif
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\import[1].png
- %Temporary Internet Files%\Content.IE5\2TPM8950\box01[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[3].htm
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\sunbeltlabs_logo[1].jpg
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\background[1].gif
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\dropdown[1].jpg
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\box06[1].gif
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\192.168.100[2].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\192.168.100[1].htm
- %Temporary Internet Files%\Content.IE5\2TPM8950\jquery-1.4.2.min[1].js
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\10[1].htm
Step 7
Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como TROJ_STARTPA.SMX En caso de que el producto de Trend Micro ya haya limpiado, eliminado o puesto en cuarentena los archivos detectados, no serán necesarios más pasos. Puede optar simplemente por eliminar los archivos en cuarentena. Consulte esta página de Base de conocimientos para obtener más información.
Rellene nuestra encuesta!