Author: Neljorn Nathaniel Aguas   

 

Backdoor:Linux/Mirai.AY!xp (MICROSOFT)

 PLATFORM:

Linux

 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

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

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: 55,408 bytes
File type: ELF
INITIAL SAMPLES RECEIVED DATE: 19 de marca de 2024
PAYLOAD: Connects to URLs/IPs, Restarts system

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.

Otros detalles

It connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.{BLOCKED}.8:53
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.199:1312
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.63:7777

Hace lo siguiente:

  • It creates a TCP socket and listens for incoming connections by binding it to the following loopback address:
    • {BLOCKED}.{BLOCKED}.{BLOCKED}.1:46237
  • It creates and sets the name of its child processes using the following:
    • /bin/sh
  • It deletes itself after spawning its child processes.
  • It checks for the following files related to watchdog to disable its functions if found:
    • /bin/watchdog
    • /dev/FTWDT101_watchdog
    • /dev/FTWDT101/watchdog
    • /dev/watchdog0
    • /etc/default/watchdog
    • /etc/watchdog
  • It restarts the system after all the child processes terminates.

  SOLUTION

Minimum scan engine: 9.800
First VSAPI Pattern File: 19.230.06
First VSAPI Pattern Release Date: 21 de marca de 2024
VSAPI OPR PATTERN-VERSION: 19.231.00
VSAPI OPR PATTERN DATE: 22 de marca de 2024

Step 2

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como Trojan.Linux.MIRAI.E 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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