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Ransom.Linux.HIVE.A

January 18, 2022
 Analysis by: Maria Emreen Viray
 ALIASES:

Ransom:Linux/FilcodrHive.G!MTB (MICROSOFT)

 PLATFORM:

Linux

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


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 executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size:

2,359,296 bytes

File Type:

ELF

Memory Resident:

No

Initial Samples Received Date:

30 Oct 2021

Payload:

Displays message/message boxes, Encrypts files

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.

Installation

This Ransomware drops the following files:

  • {encrypted directory}/{random characters}.key.21k5p

It executes then deletes itself afterward.

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

  • non-root processes

Other Details

This Ransomware does the following:

  • It continues with routine if executed with admin rights

It accepts the following parameters:

  • -no-wipe: Skip wipe free disk space stage
  • {input path}: Encrypts {input path} only

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

  • .{random characters}.21k5p

It leaves text files that serve as ransom notes containing the following text:

  • {encrypted directory}/4oEi_HOW_TO_DECRYPT.txt

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.166.04

FIRST VSAPI PATTERN DATE:

01 Nov 2021

VSAPI OPR PATTERN File:

17.167.00

VSAPI OPR PATTERN Date:

02 Nov 2021

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     
    • Troj.ELF.TRX.XXELFC1DFF012

Step 2

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • {encrypted directory}/{random characters}.key.21k5p

Step 3

Scan your computer with your Trend Micro product to delete files detected as Ransom.Linux.HIVE.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 4

Restore encrypted files from backup.


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