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CashCatRansomwareSimulator

A simple windows ransomware simulator that will rename .TXT files a ransomware extension to simulate ransomware behavior for testing various monitoring tools

Install / Use

/learn @leeberg/CashCatRansomwareSimulator
About this skill

Quality Score

0/100

Supported Platforms

Universal

README

Cashcat : The "Ransomware" Simulator 🤑🐈

A simple standalone "ransomware-like" simulator for Windows that will rename .TXT files to a known ransomware extension to simulate ransomware behavior for demos and testing various file monitoring tools and response systems.

Download

Visit the releases section on this repository: https://github.com/leeberg/CashCatRansomwareSimulator/releases

VERY IMPORTANT NOTE

THIS IS NOT REAL RANSOMWARE! IT LITERALLY DOES NOT MATCH ANY REAL DEFINITION OF RANSOMWARE! ALL IT DOES IS RENAME files with the extension of .TXT to a ransomware extension to test ransomwware detection tools. nothing. is. encrypted.

Usage

  1. Build/Download CashCat.exe - NEVER PLACE IN A PRODUCTION ENVIRONMENT
  2. Place CashCat.exe in a directory with some .txt files in the same directory.
  3. Run Cashcast.exe.
  4. All .TXT files located in the same directory as Cashcat.exe will be renamed to a common ransomware extension. No files are ACTUALLY encrypted - they are simply renamed.
  5. Enter the code 123456789 to rename all ransomware files to .TXT (this effectively UNLOCKS your files / resets your demo)

Demo

Requirements

  • Tested on Windows 7, 10, Server 2012R2, 2016+
  • Requires: .NET 4.7.2

Todo

  • Re-Implement extra configuration features without the need for dependency dlls
  • "Canary" functionality

Related Skills

View on GitHub
GitHub Stars95
CategoryDevelopment
Updated2mo ago
Forks33

Languages

C#

Security Score

85/100

Audited on Jan 28, 2026

No findings