Ransomware Research

Tohnichi Ransomware

Tohnichi is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Mallox.

Quick Facts

Ransomware Family
Tohnichi
First Seen
June 1, 2021
Known Aliases
Mallox

How Tohnichi Ransomware Works

File Encryption Patterns

Tohnichi modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..tohnichi..herrco..mallox..brg..architek..exploit..carone..avast..consultransom..devicZz..acookies..bozon3..bozon..FARGO..FARGO2..artiis..bitenc

Ransom Note and Payment Demands

After encrypting files, Tohnichi displays ransom notes demanding payment for file recovery:

fileHow to decrypt files.txt

Ransom message:

notes/How to decrypt files.txt

Note locations:

EveryFolder
fileRECOVERY INFORMATION.txt

Ransom message:

notes/RECOVERY INFORMATION.txt

Note locations:

EveryFolder
fileFILE RECOVERY.txt

Ransom message:

notes/FILE RECOVERY.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Tohnichi ransomware:

  • local.exe
  • ConsoleApp2.exe
  • aRX-00-23-93.exe
  • share.exe
  • mallox.exe
  • hbatka.exe
  • FusContainer.exe
  • Ransom.exe
  • Ofdds.exe
  • DTEAOK7H.exe
  • arx777-Ofdds.exe
  • Yjnds.exe
  • arx777-ofdds.exe
  • yjnds.exe

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About This Analysis

This Tohnichi ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Tohnichi.

Last updated: September 30, 2025

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