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Backdoor.Linux.MIRAI.VWIQT

July 09, 2019
 Analysis by: Henry Alarcon Jr.
 ALIASES:

Linux.Mirai.2690 (DrWeb), ELF:Svirtu-AA [Trj] (Avast), HEUR:Exploit.Linux.CVE-2017-17215.a (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


IoT malware uses two different encryption routines for its strings and modified the magic number of UPX.

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:

43,032 bytes

File Type:

ELF

File Compression:

UPX

Memory Resident:

No

Initial Samples Received Date:

08 Jul 2019

Payload:

Connects to URLs/IPs, Steals information

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
  • Kill its process
  • Kill all performed various attacks.
  • Kill specific process

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

  • {BLOCKED}.{BLOCKED}.143.98:259

Other Details

This Backdoor does the following:

  • It uses the following credentials to try to login to busybox telnet and used security/ misconfiguration/ default password:
    • telecomadmin
    • nE7jA%5m
    • 1234
    • support
    • user
    • ho4uku6at
    • admin01
    • admin1234
    • 7ujMko0admin
    • telecom
    • password
    • nCwMnJVGag
    • changeme
    • 20080826
    • klv123
    • tsgoingon
    • 12345
    • vizxv
    • xc3511
    • 123456
    • default
    • zlxx.
    • guest
    • OxhlwSG8
    • S2fGqNFs
    • tlJwpbo6
    • solokey
    • admintelecom
    • 1111
    • bin
    • 0000
    • pass
    • meinsm
    • 54321
    • smcadmin
    • 4321
    • ZmqVfoSIP
    • klv1234Tikwb
    • dreambox
    • 7ujMko0vizxv
    • hi3518
    • welc0me
    • root123
    • jvbzd
    • realtek
    • xmhdipc
    • 1001chin
    • GM8182
    • hunt5759
    • telnet
    • admin
    • huigu309
    • root
    • ALC#FGU
    • videoflow
    • Admin
    • CRAFTSPERSON
  • It may spread to other devices by taking advantage of the following vulnerabilities:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.224.05

FIRST VSAPI PATTERN DATE:

09 Jul 2019

VSAPI OPR PATTERN File:

15.225.00

VSAPI OPR PATTERN Date:

10 Jul 2019

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