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.

Quick Facts

Ransomware Family
Tohnichi
First Seen
June 1, 2021

How Tohnichi Ransomware Works

Targeted Files

https://unit42.paloaltonetworks.com/mallox-ransomware/ 2952d5889bdb07148770453cb5f01fa6cc4deabf97290cc511b71d6e122cfc48 -> .Net Loader cb9ad9670dcb82aa54a6526d35fee8ed1e63a1abbb29d2db2acb3f5e49b66aac -> .Net Loader 8820fe6c0f2d9f702a91f92a275a534de63e88de46f2baa05d50d4d7855bf319 -> .Net Loader

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

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: July 30, 2025

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