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IoT.Linux.MIRAI.VWISF

March 26, 2020
 Analysis by: Karen Ivy Titiwa
 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:

Dropped by other malware, Downloaded from the Internet


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 runs certain commands that it receives remotely from a malicious user. Doing this puts the affected computer and information found on the computer at greater risk.

  TECHNICAL DETAILS

File Size:

42,160 bytes

File Type:

ELF

Memory Resident:

Yes

Initial Samples Received Date:

24 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 command(s) from a remote malicious user:

  • killer
  • killallbots
  • PING
  • scanner
  • .http
  • .tcp
  • .tcpbypass
  • .udp
  • .udpbypass
  • .udphex
  • .udpplain
  • .udprand
  • Performs various DDOS attacks

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

  • {BLOCKED}.{BLOCKED}.196.75:34834
  • {BLOCKED}.{BLOCKED}.196.75:4864

Other Details

This Backdoor does the following:

  • Performs brute force on port 23 using the following credentials:
    • t0talc0ntr0l4!
    • taZz@23495859
    • default
    • admin
    • root
    • guest
    • dvr2580222
    • support
    • user
    • daemon
    • juantech
    • 123456
    • solokey
    • xc3511
    • 12345
    • xmhdipc
    • tsgoingon
    • zlxx.
    • Zte521
    • hunt5759
    • samsung
    • vizxv
  • It displays the following string once executed in the command line:
    • Protecting your device from further infections.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.766.04

FIRST VSAPI PATTERN DATE:

26 Mar 2020

VSAPI OPR PATTERN File:

15.767.00

VSAPI OPR PATTERN Date:

27 Mar 2020

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