Ransomware Research

CRFILE Ransomware

CRFILE is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2025, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
CRFILE
First Seen
April 1, 2025

How CRFILE Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..CRFILE2

Ransom Note and Payment Demands

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

fileREAD_NOTE.html

Ransom message:

notes/READ_NOTE.html

Note locations:

EveryFolder
screenshot

Ransom message:

notes/output.png

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with CRFILE ransomware:

  • 2.ex
  • CRFILE2.exe

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About This Analysis

This CRFILE 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 CRFILE.

Last updated: October 30, 2025

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