Alias

TrojanDropper:Win32/Small (Microsoft); [00001304.EXE]:BackDoor-DLH (McAfee); Backdoor.Pcclient (Symantec); Trojan-Dropper.Win32.Agent.bbq (Kaspersky); BehavesLike.Win32.Malware.spi (mx-v) (Sunbelt); Trojan.Spy.Delf.NPB (FSecure)

 Plataforma:

Windows 2000, Windows XP, Windows Server 2003

 Riesgo general:
 Infección divulgada:
 Impacto en el sistema :
 Revelación de la información:
Bajo
Medio
High
Crítico

  • Tipo de malware
    Spyware

  • Destructivo?
    No

  • Cifrado
     

  • In the Wild:
    Sí

  Resumen y descripción

Elimina archivos para impedir la ejecución correcta de programas y aplicaciones.

Este malware se elimina tras la ejecución.

  Detalles técnicos

Tamaño del archivo 134,656 bytes
Tipo de archivo EXE
Residente en memoria No
Fecha de recepción de las muestras iniciales 03 noviembre 2012

Otras modificaciones del sistema

Elimina los archivos siguientes:

  • %System%\trkwkssw.dll
  • %System%\trkwksswsw.dll
  • %System%\trkwksswswsw.dll
  • %System%\trkwksswswswsw.dll
  • %System%\trkwksswswswswsw.dll
  • %System%\trkwksswswswswswsw.dll
  • %System%\trkwksswswswswswswsw.dll
  • %System%\trkwksswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\trkwksswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswswsw.dll
  • %System%\Swz2.bat

(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).

)

Agrega las siguientes entradas de registro como parte de la rutina de instalación:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\TrkWks

Agrega las siguientes entradas de registro:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\TrkWks
Asynchronous = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\TrkWks
Impersonate = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\TrkWks
DllName = "%System%\trkwkssw.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\TrkWks
Startup = "IESetup"

Rutina de infiltración

Infiltra los archivos siguientes:

  • %System%\Swz97.dll
  • %System%\Swz2.bat
  • %System%\trkwkssw.dll

(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).

)

Otros detalles

Este malware se elimina tras la ejecución.

  Soluciones

Motor de exploración mínimo 9.300

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

Eliminar esta clave del Registro

[ aprenda más ]

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 NT\CurrentVersion\Winlogon\Notify
    • TrkWks

Step 3

Eliminar este valor del Registro

[ aprenda más ]

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 NT\CurrentVersion\Winlogon\Notify\TrkWks
    • Asynchronous = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\TrkWks
    • Impersonate = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\TrkWks
    • DllName = "%System%\trkwkssw.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\TrkWks
    • Startup = "IESetup"

Step 4

Buscar y eliminar estos archivos

[ aprenda más ]
Puede que algunos de los archivos del componente estén ocultos. Asegúrese de que tiene activada la casilla Buscar archivos y carpetas ocultos en la opción "Más opciones avanzadas" para que el resultado de la búsqueda incluya todos los archivos y carpetas ocultos.
  • %System%\Swz97.dll
  • %System%\Swz2.bat
  • %System%\trkwkssw.dll

Step 5

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como TSPY_DELF.ESH 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.


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