Analysis by: Patrick Noel Collado
ALIASES:

HEUR:Backdoor.Linux.Mirai.b (Kaspersky), ELF:Mirai-AHC [Trj] (Avast)

 PLATFORM:

Linux

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

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.

  TECHNICAL DETAILS

File Size: 107,628 bytes
File Type: ELF
Memory Resident: Yes
Initial Samples Received Date: 09 Jul 2020
Payload: Launches DoS/DDoS attacks, Connects to URLs/IPs

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.

Backdoor Routine

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

  • hoon.{BLOCKED}um.cc
  • park.{BLOCKED}um.cc

Denial of Service (DoS) Attack

This Backdoor is capable of performing various network denial-of-service (DoS) attacks:

    Other Details

    This Backdoor does the following:

    • It uses the following credentials to try to login to other devices:
      • root
      • ttnet
      • 1001chin
      • ivdev
      • bin
      • default
      • daemon
      • cms500
      • ROOT500
      • ROOT
      • tslinux
      • zsun1188
      • PlsChgMe1
      • upgrade
      • telco
      • 1111
      • 321
      • uid=0
      • uid0
      • system
      • telnetroot
      • rootpassword
      • rootpass
      • telnetpass
      • telnetpassword
      • shell
      • taZz@23495859
      • tsgoingon
      • superuser
      • linuxshell
      • 123456
      • guest
      • 12345
      • user
      • admin
      • device
    • It connects to the Google's DNS server to obtain the IP address of the infected machine.

      SOLUTION

    Minimum Scan Engine: 9.850
    FIRST VSAPI PATTERN FILE: 15.982.05
    FIRST VSAPI PATTERN DATE: 10 Jul 2020
    VSAPI OPR PATTERN File: 15.983.00
    VSAPI OPR PATTERN Date: 11 Jul 2020

    Scan your computer with your Trend Micro product to delete files detected as IoT.Linux.MIRAI.VWIUM. 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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