Analysis by: Karen Ivy Titiwa
ALIASES:

Backdoor:Linux/Mirai.B (MICROSOFT); HEUR:Backdoor.Linux.Mirai.a (KASPERSKY)

 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, Dropped by other malware

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: 88,104 bytes
Memory Resident: Yes
Initial Samples Received Date: 31 Mar 2020
Payload: 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 executes the following commands from a remote malicious user:

  • Performs various DDOS attacks

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

  • {BLOCKED}.{BLOCKED}.147.36
  • {BLOCKED}.{BLOCKED}.200.172
  • {BLOCKED}.{BLOCKED}.176.63

Download Routine

This Backdoor connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}.{BLOCKED}.236.119/leon.{architecture}
  • http://{BLOCKED}.{BLOCKED}.44.33/bins/Hilix.mips
  • http://{BLOCKED}.{BLOCKED}.116.236/meliodic/meliodic.{architecture}
  • http://{BLOCKED}.{BLOCKED}.176.63/meliodic/meliodic.{architecture}

Other Details

This Backdoor does the following:

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.782.04
FIRST VSAPI PATTERN DATE: 03 Apr 2020
VSAPI OPR PATTERN File: 15.783.00
VSAPI OPR PATTERN Date: 04 Apr 2020

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