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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:

    • It uses the following credentials to try to login to other devices:
      • taZz@23495859
      • root
      • tsgoingon
      • solokey
      • admin
      • default
      • user
      • guest
      • telnetadmin
      • 1111
      • 1234
      • 12345
      • 123456
      • 54321
      • 88888888
      • 20080826
      • 666666
      • 1001chin
      • xc3511
      • vizxv
      • 5up
      • jvbzd
      • hg2x0
      • Zte521
      • grouter
      • telnet
      • oelinux123
      • tl789
      • GM8182
      • hunt5759
      • telecomadmin
      • twe8ehome
      • h3c
      • nmgx_wapia
      • private
      • abc123
      • ROOT500
      • ahetzip8
      • anko
      • ascend
      • blender
      • cat1029
      • changeme
      • iDirect
      • nflection
      • ipcam_rt5350
      • swsbzkgn
      • juantech
      • pass
      • password
      • svgodie
      • t0talc0ntr0l4!
      • zhongxing
      • zlxx.
      • zsun1188
      • xmhdipc
      • klv123
      • hi3518
      • dreambox
      • system
      • iwkb
      • realtek
      • 00000000
      • huigu309
      • win1dows
      • antslq
    • It displays the following string once executed in the command line:
      • unstableishere
    • It may spread to other devices by taking advantage of the following vulnerabilities:

      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

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