arrow_back
search
close

IoT.Linux.MIRAI.VWISI

July 08, 2020
 Analysis by: Jemimah Mae Molina
 PLATFORM:

Unix

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


This new Mirai variant exploits CVE-2020-10173, a vulnerability in Comtrend VR-3033 routers. Similar to earlier variants, this Mirai variant uses telnet and SSH brute-forcing techniques to attack vulnerable devices.

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:

41,856 bytes

File Type:

ELF

File Compression:

UPX

Memory Resident:

Yes

Initial Samples Received Date:

02 Jul 2020

Payload:

Connects to URLs/IPs, 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 connects to the following URL(s) to send and receive commands from a remote malicious user:

  • methcnc.{BLOCKED}s.org
  • methscan.{BLOCKED}s.org

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:

      SOLUTION

    Minimum Scan Engine:

    9.850

    FIRST VSAPI PATTERN FILE:

    15.968.02

    FIRST VSAPI PATTERN DATE:

    03 Jul 2020

    VSAPI OPR PATTERN File:

    15.969.00

    VSAPI OPR PATTERN Date:

    04 Jul 2020

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


    Did this description help? Tell us how we did.