Ransomware Research

CrptXXX Ransomware

CrptXXX is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
CrptXXX
First Seen
March 1, 2017

How CrptXXX Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..crptxxx

Ransom Note and Payment Demands

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

fileHOW_TO_FIX_!.txt

Ransom message:

notes/HOW_TO_FIX_!.txt
filedecrypt.txt

Ransom message:

notes/decrypt.txt

Note locations:

Desktop
fileREADME.txt
fileHOW_TO_DECRYPT.txt

Technical Indicators

Associated Executable Files

The following executable files are associated with CrptXXX ransomware:

  • binz.exe

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About This Analysis

This CrptXXX 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 CrptXXX.

Last updated: October 30, 2025

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