Threat Encyclopedia

Backdoor.Linux.MIRAI.AR

Publish date: December 20, 2018

ANALYSIS BY

Warren Adam Sto. Tomas


ALIASES:

Linux.Mirai (Ikarus); ELF:Mirai-TO [Trj] (Avast)

PLATFORM:

Linux

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

  • Threat Type:Backdoor

  • Destructiveness:No

  • Encrypted: Yes

  • In the wild: Yes

OVERVIEW


This backdoor may arrive in the affected system via ThinkPHP Remote Code Execution exploit.

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

TECHNICAL DETAILS

File Size:

38,464 bytes

File Type:

ELF

Memory Resident:

No

Initial Samples Received Date:

13 Dec 2018

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 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

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

  • lolis{BLOCKED}er.com:42352

Other Details

This Backdoor does the following:

  • It uses the following credentials to try to login to other devices:
    • 1001chin
    • adm
    • admin123
    • admintelecom
    • aquario
    • default
    • e8ehome
    • e8telnet
    • GM8182
    • gpon
    • oh
    • root
    • support
    • taZz@23495859
    • telecomadmin
    • telnetadmin
    • tsgoingon
    • ttnet
    • vizxv
    • zte
  • It displays the strings below once executed in the command line:
    • your device just got infected to a bootnoot
  • It is capable of terminating processes which satisfies any of the following conditions:
    • uses any of the following ports:
      • 23
      • 8080
      • 81
      • 53413
    • memory of the process contains strings related to botnets

SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.686.06

FIRST VSAPI PATTERN DATE:

13 Dec 2018

VSAPI OPR PATTERN File:

14.687.00

VSAPI OPR PATTERN Date:

14 Dec 2018

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Linux.MIRAI.AR. 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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