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Backdoor.Linux.MIRAI.SEMR

December 12, 2021
 Analysis by: Warren Adam Sto. Tomas
 PLATFORM:

Linux

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


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 may be downloaded from remote sites by other malware.

  TECHNICAL DETAILS

File Size:

915,088 bytes

File Type:

ELF

Memory Resident:

No

Initial Samples Received Date:

11 Dec 2021

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.

It may be downloaded from remote site(s) by the following malware:

Backdoor Routine

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

  • {BLOCKED }uy

Denial of Service (DoS) Attack

This Backdoor is capable of performing various network denial-of-service (DoS) attacks:

  • ACK
  • GREIP
  • SOCKET
  • STOMP
  • SYN
  • UDP
  • WRA

Other Details

This Backdoor does the following:

  • It displays the following string once executed in the command line:
    • instagram.com/iot.js
  • It terminates any processes if it satisfies the following conditions:
    • Has the following string in its file contents:
      • socket:
    • Is not found in the following directories:
      • /lib/
      • /sbin/
      • /usr/

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.248.04

FIRST VSAPI PATTERN DATE:

12 Dec 2021

VSAPI OPR PATTERN File:

17.249.00

VSAPI OPR PATTERN Date:

13 Dec 2021

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