PLATFORM:

Windows

 OVER ALL RISK RATING:
 REPORTED INFECTION:
 Beeinträchtigung der Systemleistung ::
 INFORMATION EXPOSURE:
Low
Medium
High
Critical

  • Threat Type:
    Potentially Unwanted Application

  • Destructiveness:
    No

  • Encrypted:
     

  • In the wild::
    Yes

  OVERVIEW

It 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: 14,972,408 bytes
File type: EXE
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 04 czerwca 2020

Detalles de entrada

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Instalación

Agrega los procesos siguientes:

  • "%User Temp%\InstallTools.exe" "{malware file path and name}" Software\ByteFence INSNDE "{malware file path and name}" /mode=s /url=logs.bytefence.com/event /product=Bytefence
  • taskkill /f /im ByteFence.exe
  • taskkill /f /im ByteFenceService.exe
  • taskkill /f /im ByteFenceScan.exe
  • taskkill /f /im rsEngineHelper.exe
  • taskkill /f /im rsLggr.exe
  • "%System Root%\Program Files\ByteFence\ByteFenceService.exe" -i
  • "%System Root%\Program Files\ByteFence\ByteFenceService.exe"

Crea las carpetas siguientes:

  • %System Root%\Program Files\ByteFence
  • %System Root%\Program Files\ByteFence\x64
  • %System Root%\Program Files\ByteFence\x86
  • %System Root%\Program Files\ByteFence\amd64

(Nota: %System Root% es la carpeta raíz, normalmente C:\. También es la ubicación del sistema operativo).

)

Técnica de inicio automático

Elimina las siguientes claves de registro asociadas a aplicaciones antivirus y de seguridad:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ByteFenceService
ImagePath = "%System Root%\Program Files\ByteFence\ByteFenceService.exe"

Otras modificaciones del sistema

Agrega las siguientes entradas de registro:

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
INSNDE = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
NDLAFLT = ""

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
NDLCHAN = ""

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
AFLTCREATED = "1589423755"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
DisplayName = "ByteFence Anti-Malware"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
UninstallString = "%System Root%\Program Files\ByteFence\uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
Publisher = "Byte Technologies LLC"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
InstallSource = "%System Root%\Program Files\ByteFence"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
DisplayVersion = "5.6.2.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
DisplayIcon = "%System Root%\Program Files\ByteFence\Uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
URLInfoAbout = "https://www.{BLOCKED}nce.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\ByteFence
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
INSTUID = "{{GUID}}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
MOLOG = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
INSTUID = "{{GUID}}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
MOLOG = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\eventlog\Application
AutoBackupLogFiles = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
ByteFenceService
EventMessageFile = "%Windows%\Microsoft.NET\Framework64\v2.0.50727\EventLogMessages.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
FirstRun = "2/5/2020 12:54:15 PM"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
FirstRun = "2/5/2020 12:54:15 PM"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
U = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
U = "{GUID}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
ByteFence
UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ByteFenceService
DisplayName = "ByteFence Anti-Malware Service"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\ByteFenceService
Start = "SERVICE_AUTO_START"

Rutina de infiltración

Infiltra los archivos siguientes:

  • %System Root%\Program Files\ByteFence\InstallUtil.InstallLog
  • %System Root%\Program Files\ByteFence\x86\ext_x86.dll
  • %System Root%\Program Files\ByteFence\Uninstall.exe
  • %System Root%\Program Files\ByteFence\amd64\KernelTraceControl.dll
  • %System Root%\Program Files\ByteFence\rsEngineHelper.exe.config
  • %User Temp%\bytefence-installer-5.6.2.0.exe
  • %System Root%\Program Files\ByteFence\ByteFenceService.InstallState
  • %System Root%\Program Files\ByteFence\x86\rsEngineFW_x86.dll
  • %System Root%\Program Files\ByteFence\rsUtils.dll
  • %System Root%\Program Files\ByteFence\ByteFenceService.InstallLog
  • %System Root%\Program Files\ByteFence\EULA.txt
  • %System Root%\Program Files\ByteFence\x64\System.Data.SQLite.dll
  • %System Root%\Program Files\ByteFence\x64\ext_x64.dll
  • %System Root%\Program Files\ByteFence\x64\rsEngineFW_x64.dll
  • %System Root%\Program Files\ByteFence\ByteFenceService.exe
  • %System Root%\Program Files\ByteFence\x86\7z86.dll
  • %System Root%\Program Files\ByteFence\ByteFenceScan.exe
  • %System Root%\Program Files\ByteFence\x86\msdia140.dll
  • %System Root%\Program Files\ByteFence\x86\lz4_x86.dll
  • %System Root%\program files\bytefence\rsEngine.config
  • %System Root%\Program Files\ByteFence\Signatures.dat
  • %System Root%\Program Files\ByteFence\x64\7z64.dll
  • %System Root%\Program Files\ByteFence\protobuf-net.dll
  • %System Root%\Program Files\ByteFence\ByteFence.exe
  • %System Root%\Program Files\ByteFence\Microsoft.Win32.TaskScheduler.dll
  • %System Root%\Program Files\ByteFence\rsEngineHelper.exe
  • %System Root%\Program Files\ByteFence\x64\rsLggrServer_x64.dll
  • %System Root%\Program Files\ByteFence\Microsoft.Diagnostics.Tracing.TraceEvent.dll
  • %User Temp%\InstallTools.exe
  • %System Root%\Program Files\ByteFence\x86\rsEnginePM_x86.dll
  • %System Root%\Program Files\ByteFence\websocket-sharp.dll
  • %System Root%\Program Files\ByteFence\ByteFenceService.exe.config
  • %System Root%\Program Files\ByteFence\ByteFenceGUI.dll
  • %System Root%\Program Files\ByteFence\WhiteList.dat
  • %System Root%\Program Files\ByteFence\amd64\msdia140.dll
  • %System Root%\Program Files\ByteFence\Errors.dat
  • %System Root%\Program Files\ByteFence\x86\KernelTraceControl.dll
  • %System Root%\Program Files\ByteFence\x64\lz4_x64.dll
  • %System Root%\Program Files\ByteFence\x86\System.Data.SQLite.dll
  • %System Root%\Program Files\ByteFence\rsEngine.dll
  • %System Root%\Program Files\ByteFence\x64\rsEnginePM_x64.dll
  • %System Root%\Program Files\ByteFence\ByteFence.exe.config
  • %System Root%\Program Files\ByteFence\rsMessages.dll
  • %System Root%\Program Files\ByteFence\dummy.dat
  • %System Root%\Program Files\ByteFence\x86\rsLggrServer_x86.dll

(Nota: %System Root% es la carpeta raíz, normalmente C:\. También es la ubicación del sistema operativo).

. %User Temp% es la carpeta Temp del usuario activo, que en el caso de Windows 2000(32-bit), XP y Server 2003(32-bit) suele estar en C:\Documents and Settings\{nombre de usuario}\Local Settings\Temp y en el case de Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) y 10(64-bit) en C:\Users\{nombre de usuario}\AppData\Local\Temp).

)

  SOLUTION

Minimum scan engine: 9.850

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

Identificar y terminar los archivos detectados como PUA.Win32.ByteFence.C

[ learnMore ]
  1. Para los usuarios de Windows 98 y ME, puede que el Administrador de tareas de Windows no muestre todos los procesos en ejecución. En tal caso, utilice un visor de procesos de una tercera parte (preferiblemente, el Explorador de procesos) para terminar el archivo de malware/grayware/spyware. Puede descargar la herramienta en cuestión aquí.
  2. Si el archivo detectado aparece en el Administrador de tareas o en el Explorador de procesos, pero no puede eliminarlo, reinicie el equipo en modo seguro. Para ello, consulte este enlace para obtener todos los pasos necesarios.
  3. Si el archivo detectado no se muestra en el Administrador de tareas o el Explorador de procesos, prosiga con los pasos que se indican a continuación.

Step 3

Eliminar este valor del Registro

[ learnMore ]

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\ByteFence
    • INSNDE = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • NDLAFLT = ""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • NDLCHAN = ""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • AFLTCREATED = "1589423755"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • DisplayName = "ByteFence Anti-Malware"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • UninstallString = "%System Root%\Program Files\ByteFence\uninstall.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • Publisher = "Byte Technologies LLC"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • InstallSource = "%System Root%\Program Files\ByteFence"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • DisplayVersion = "5.6.2.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • DisplayIcon = "%System Root%\Program Files\ByteFence\Uninstall.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • URLInfoAbout = "https://www.{BLOCKED}nce.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\ByteFence
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • INSTUID = "{{GUID}}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • MOLOG = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
    • PINSTP = "/LM=3 /INSTEX /cd=12345 /thankyou /IGNORE={malware file path and name}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
    • INSTUID = "{{GUID}}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
    • MOLOG = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Application
    • AutoBackupLogFiles = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\ByteFenceService
    • EventMessageFile = "%Windows%\Microsoft.NET\Framework64\v2.0.50727\EventLogMessages.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • FirstRun = "2/5/2020 12:54:15 PM"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
    • FirstRun = "2/5/2020 12:54:15 PM"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • U = "{GUID}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ByteFence
    • UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
    • U = "{GUID}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ByteFence
    • UH = "D7EA828DDEFDC9EDB4B37ABDB24BBE8B"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ByteFenceService
    • DisplayName = "ByteFence Anti-Malware Service"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ByteFenceService
    • Start = "SERVICE_AUTO_START"

Step 4

Buscar y eliminar estos archivos

[ learnMore ]
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 Root%\Program Files\ByteFence\InstallUtil.InstallLog
  • %System Root%\Program Files\ByteFence\x86\ext_x86.dll
  • %System Root%\Program Files\ByteFence\Uninstall.exe
  • %System Root%\Program Files\ByteFence\amd64\KernelTraceControl.dll
  • %System Root%\Program Files\ByteFence\rsEngineHelper.exe.config
  • %User Temp%\bytefence-installer-5.6.2.0.exe
  • %System Root%\Program Files\ByteFence\ByteFenceService.InstallState
  • %System Root%\Program Files\ByteFence\x86\rsEngineFW_x86.dll
  • %System Root%\Program Files\ByteFence\rsUtils.dll
  • %System Root%\Program Files\ByteFence\ByteFenceService.InstallLog
  • %System Root%\Program Files\ByteFence\EULA.txt
  • %System Root%\Program Files\ByteFence\x64\System.Data.SQLite.dll
  • %System Root%\Program Files\ByteFence\x64\ext_x64.dll
  • %System Root%\Program Files\ByteFence\x64\rsEngineFW_x64.dll
  • %System Root%\Program Files\ByteFence\ByteFenceService.exe
  • %System Root%\Program Files\ByteFence\x86\7z86.dll
  • %System Root%\Program Files\ByteFence\ByteFenceScan.exe
  • %System Root%\Program Files\ByteFence\x86\msdia140.dll
  • %System Root%\Program Files\ByteFence\x86\lz4_x86.dll
  • %System Root%\program files\bytefence\rsEngine.config
  • %System Root%\Program Files\ByteFence\Signatures.dat
  • %System Root%\Program Files\ByteFence\x64\7z64.dll
  • %System Root%\Program Files\ByteFence\protobuf-net.dll
  • %System Root%\Program Files\ByteFence\ByteFence.exe
  • %System Root%\Program Files\ByteFence\Microsoft.Win32.TaskScheduler.dll
  • %System Root%\Program Files\ByteFence\rsEngineHelper.exe
  • %System Root%\Program Files\ByteFence\x64\rsLggrServer_x64.dll
  • %System Root%\Program Files\ByteFence\Microsoft.Diagnostics.Tracing.TraceEvent.dll
  • %User Temp%\InstallTools.exe
  • %System Root%\Program Files\ByteFence\x86\rsEnginePM_x86.dll
  • %System Root%\Program Files\ByteFence\websocket-sharp.dll
  • %System Root%\Program Files\ByteFence\ByteFenceService.exe.config
  • %System Root%\Program Files\ByteFence\ByteFenceGUI.dll
  • %System Root%\Program Files\ByteFence\WhiteList.dat
  • %System Root%\Program Files\ByteFence\amd64\msdia140.dll
  • %System Root%\Program Files\ByteFence\Errors.dat
  • %System Root%\Program Files\ByteFence\x86\KernelTraceControl.dll
  • %System Root%\Program Files\ByteFence\x64\lz4_x64.dll
  • %System Root%\Program Files\ByteFence\x86\System.Data.SQLite.dll
  • %System Root%\Program Files\ByteFence\rsEngine.dll
  • %System Root%\Program Files\ByteFence\x64\rsEnginePM_x64.dll
  • %System Root%\Program Files\ByteFence\ByteFence.exe.config
  • %System Root%\Program Files\ByteFence\rsMessages.dll
  • %System Root%\Program Files\ByteFence\dummy.dat
  • %System Root%\Program Files\ByteFence\x86\rsLggrServer_x86.dll

Step 5

Buscar y eliminar estas carpetas

[ learnMore ]
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 todas las carpetas ocultas.
  • %System Root%\Program Files\ByteFence
  • %System Root%\Program Files\ByteFence\x64
  • %System Root%\Program Files\ByteFence\x86
  • %System Root%\Program Files\ByteFence\amd64

Step 6

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como PUA.Win32.ByteFence.C 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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