Ransomware Research

Crypton Ransomware

Crypton is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Crypton
First Seen
November 1, 2016

How Crypton Ransomware Works

Targeted Files

Requires C&C to receive key and other data {original filename}_crypt{original extension} c84a02a0b3cfe2af4c0c04c7ca69351a41501034bde0bb682ecb884b4e8aa36c -> OK (doesnt change filenames)

File Encryption Patterns

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

File extensions added after encryption:

._steaveiwalker@india.com_

Ransom Note and Payment Demands

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

filereadme_encrypted.txt

Ransom message:

notes/readme_encrypted.txt

Note locations:

Desktop
fileCOMO_ABRIR_ARQUIVOS.txt

Ransom message:

notes/COMO_ABRIR_ARQUIVOS.txt

Note locations:

EveryFolder
fileREADME.TXT

Ransom message:

notes/README.TXT

Note locations:

EveryFolder
message

Ransom message:

notes/note.txt

Note locations:

Login

Technical Indicators

Associated Executable Files

The following executable files are associated with Crypton ransomware:

  • Crypton.exe
  • a.exe
  • crypton.exe
  • 777.exe
  • Dloader_exe.exe
  • Фотоматериалы_архив.exe

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About This Analysis

This Crypton 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 Crypton.

Last updated: July 30, 2025

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