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Backdoor.Linux.MIRAI.VWIRC

July 31, 2019
 Analysis by: Earle Maui Earnshaw
 ALIASES:

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:

  • 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:

63,656 bytes

File Type:

, ELF

Memory Resident:

Yes

Initial Samples Received Date:

30 Jul 2019

Payload:

Connects to URLs/IPs, Displays message/message boxes, Exploits vulnerabilities

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:

  • cnc.{BLOCKED}e.fun
  • {BLOCKED}n.{BLOCKED}e.fun

Other Details

This Backdoor does the following:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.268.02

FIRST VSAPI PATTERN DATE:

31 Jul 2019

VSAPI OPR PATTERN File:

15.269.00

VSAPI OPR PATTERN Date:

01 Aug 2019

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