Ransomware Research

CryBrazil Ransomware

CryBrazil is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2018, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
CryBrazil
First Seen
May 1, 2018

How CryBrazil Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..crybrazil..hacked

Ransom Note and Payment Demands

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

fileSUA_CHAVE.html

Ransom message:

notes/SUA_CHAVE.html

Note locations:

Desktop
screenshot

Ransom message:

notes/ranso4.jpg

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with CryBrazil ransomware:

  • NaoLeia.exe
  • myfile.exe
  • crybrazil.exe
  • CryBrazil.exe
  • 1.exe

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About This Analysis

This CryBrazil 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 CryBrazil.

Last updated: October 30, 2025

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