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Ransom.Linux.MULTIVERZE.A

December 21, 2023
 Analysis by: John Rainier Navato
 ALIASES:

Ransom:Linux/Biotech.A!MTB (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It drops files as ransom note. It avoids encrypting files with the following file extensions.

  TECHNICAL DETAILS

File Size:

13,650 bytes

File Type:

ELF

Memory Resident:

No

Initial Samples Received Date:

22 Nov 2023

Payload:

Encrypts files, Displays windows

Arrival Details

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other Details

This Ransomware does the following:

  • It displays log activity through console.

Ransomware Routine

This Ransomware avoids encrypting files found in the following folders:

  • biotech
  • biotechdec

It appends the following extension to the file name of the encrypted files:

  • .biotech

It drops the following file(s) as ransom note:

  • {Malware File Path}\black_letter.txt

It avoids encrypting files with the following file extensions:

  • .biotech

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.888.04

FIRST VSAPI PATTERN DATE:

19 Dec 2023

VSAPI OPR PATTERN File:

18.889.00

VSAPI OPR PATTERN Date:

20 Dec 2023

Step 1

Scan your computer with your Trend Micro product to delete files detected as Ransom.Linux.MULTIVERZE.A. 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:

Step 2

Restore encrypted files from backup.


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