Analysis by: Henry Alarcon Jr.
ALIASES:

ELF/Mirai.A!tr (Fortinet), HEUR:Backdoor.Linux.Gafgyt.cn (Kaspersky)

 PLATFORM:

Linux

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Canal de infección Downloaded from the Internet

This new Mirai variant uses a total of 13 different exploits, almost all of which have been used in previous Mirai-related attacks. It has backdoor and distributed denial-of-service (DDoS) capabilities.

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

It executes then deletes itself afterward.

It executes commands from a remote malicious user, effectively compromising the affected system.

  TECHNICAL DETAILS

Tamaño del archivo 216,934 bytes
Tipo de archivo ELF
Residente en memoria No
Fecha de recepción de las muestras iniciales 09 May 2019
Carga útil Connects to URLs/IPs, Steals information

Arrival Details

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

Installation

This Backdoor executes then deletes itself afterward.

Backdoor Routine

This Backdoor executes the following commands from a remote malicious user:

  • Download a file
  • Performs various DDOS attacks
  • Execute shell commands
  • Uses default or easy-to-guess usernames and passwords to login to other devices
  • Kill its process
  • Kill all performed various attacks.
  • Kill specific process

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • {BLOCKED}.{BLOCKED}.102.123:1337

Other Details

This Backdoor does the following:

  SOLUTION

Motor de exploración mínimo 9.850
Primer archivo de patrones de VSAPI 15.102.06
Primera fecha de publicación de patrones de VSAPI 10 May 2019
Versión de patrones OPR de VSAPI 15.103.00
Fecha de publicación de patrones OPR de VSAPI 11 May 2019

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Linux.MIRAI.VWIPT. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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