Author: Melvin Jhun Palbusa   

 

HackTool:MSIL/SharpDump (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type:
    Hacking Tool

  • Destructiveness:
    No

  • Encrypted:
     

  • In the wild::
    Yes

  OVERVIEW

INFECTION CHANNEL: Descargado de Internet, Eliminado por otro tipo de malware

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

Ejecuta comandos desde un usuario remoto malicioso que pone en peligro el sistema afectado.

  TECHNICAL DETAILS

File size: 120,832 bytes
File type: DLL
Memory resident: No
INITIAL SAMPLES RECEIVED DATE: 17 listopada 2022
PAYLOAD: Executes files

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.

Rutina de puerta trasera

Ejecuta los comandos siguientes desde un usuario remoto malicioso:

  • clr_dumplsass → Dump LSASS memory. It can contain a directory where the dumped LSASS is being stored, or, by default, it will be saved in %systemroot%\Temp
  • clr_pwd → Get current Directory
  • clr_ls → List current directory or the argument
  • clr_cd → Set the current directory with a custom PATH parameter.
  • clr_ping → Ping command
  • clr_rm → Delete specified file
  • clr_cat → Get content of specified file
  • clr_ps → List running processes
  • clr_netstat → netstat command to get active connections
  • clr_getav → List installed AV products
  • clr_rdp → Enable RDP on device and return the RDP port number
  • clr_adduser → Creates a user under Administrators group with custom username and password
  • clr_cmd → Execute custom commands
  • clr_exec → Executes a file with specified argument.
    • It accepts the following parameter:
      • "-p" - process name
      • "-a" - argument of process
    • If it does not contain '-p', it works the same way as clr_cmd.
  • clr_efspotato → Local Privilege Escalation using EfsPotato
    • it accepts the following parameters:
      • "-p" - target process
      • "-a" - argument
  • clr_badpotato → Local Privilege Escalation using Bad Potato.
  • clr_download → Contains target URL and target directory where the download will be saved.
  • clr_combine → Combine files that contains a custom filename + "_*.config_txt".
  • clr_scloader → Shellcode loader that contains a BASE64-encoded string, which is an XORed shellcode along with its XOR key, and injects it into werfault.exe.
  • clr_scloader1 → Shellcode loader that contains the FILEPATH of the shellcode and its XOR key, and injects it into werfault.exe.
  • clr_scloader2 → Shellcode loader that Injects a shellcode(Not XORed) to werfault.exe.

Otros detalles

Hace lo siguiente:

  • It is capable to use PingCastle - a tool that can be used to collect information required for attacks in Active Directory environments

  SOLUTION

Minimum scan engine: 9.800
SSAPI Pattern-Datei: 2.677.00
SSAPI Pattern veröffentlicht am: 23 de listopada de 2023

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 HackTool.MSIL.Sharpdump.YPCKQT 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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