Analysis by: Jeanne Jocson
ALIASES:

Linux.Mirai (Symantex) , Linux/Mirai.E trojan (NOD32), HEUR:Backdoor.Linux.Mirai.b (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

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 listens on ports.

  TECHNICAL DETAILS

File Size: 76,952 bytes
File Type: ELF
Memory Resident: Yes
Initial Samples Received Date: 06 Dec 2016
Payload: Connects to URLs/IPs, Downloads files

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 listens on the following port(s):

  • 7547
  • 5555
  • 22
  • 23

Download Routine

This backdoor connects to the following URL(s) to download its component file(s):

  • http://l.{BLOCKED}ost.host/{digit}

Other Details

This backdoor does the following:

  • Uses common or factory-default usernames and passwords to login to attacked devices
  • Downloads files
  • Executes shell
  • Performs DDOS attacks

  SOLUTION

Minimum Scan Engine: 9.800

Scan your computer with your Trend Micro product to delete files detected as ELF_MIRAI.E. 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 this Knowledge Base page for more information.


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