Deploying Ransomware Canary Files

---
name: Dağıt:ing-ransomware-canary-files
description: Dağıt:s and monitors ransomware canary files across critical directories using Python's watchdog library for real-time filesystem event Tespit. Places strategically named decoy files that
  mimic high-value targets (financial records, credentials, database exports) in locations ransomware typically enumerates first. Monitors for any read, modify, rename, or delete operations on canary files
  and triggers immediate alerts via email, Slack webhook, or syslog when interaction is Detected, provid...
tags:
- ransomware-defense
- defense
- siber-güvenlik
- deception
- watchdog
- canary-files
- fetih
- cybersecurity
- ransomware
- early-warning
- Tespit
triggers:
- alert
- api
- canary
- Dağıt:ing
- email
- encryption
- endpoint
- files
- hash
- http
- incident
- log
category: ransomware-defense
source_subdomain: ransomware-defense
nist_csf:
- PR.DS-11
- RS.MA-01
- RC.RP-01
- PR.IR-01
adapted_for: fetih
---

# Dağıt:ing Ransomware Canary Files


## Ne Zaman Kullanılır

- Dağıt:ing proactive ransomware Tespit on file servers, NAS devices, or endpoint systems
- Building an early-warning system that tespit etme (s) ransomware before it encrypts business-critical data
- Supplementing EDR solutions with lightweight canary file monitoring on systems where agents cannot be Dağıtılmış
- Testing ransomware incident response procedures by simulating canary file triggers
- Monitoring shared drives, home directories, and backup volumes for unauthorized file operations

**Kullanma:** as a replacement for endpoint protection, backup strategy, or network segmentation. Canary files are a Tespit layer, not a prevention mechanism.

## Ön Gereksinimler

- Python 3.8+ with pip
- watchdog library (pip install watchdog)
- Write Erişim: directories where canary files will be placed
- SMTP server credentials or Slack webhook URL for alerting
- Administrative access for placing canaries in system directories

## İş Akışı

### Adım 1: Generate Canary Files

Create decoy files with realistic names and content that attract ransomware scanners. Files should have names like `Passwords.xlsx`, `Financial_Report_2026.docx`, `backup_credentials.csv` and contain plausible-looking but fake data. Place them in directories ransomware typically targets first: user desktops, Documents folders, network share roots, and backup paths.

### Adım 2: Dağıt: Filesystem Monitor

Use Python's watchdog library with a custom `FileSystemEventHandler` that watches canary file paths. The handler triggers on `on_modified`, `on_deleted`, `on_moved`, and `on_created` events for canary files. Any legitimate user or process should never touch these files, so any interaction is a high-confidence indicator of ransomware or unauthorized access.

### Adım 3: Configure Alert Pipeline

Wire the filesystem monitor to multiple alert channels: email via SMTP, Slack webhook POST, syslog forwarding to SIEM, and local log file. Include the triggering event type, file path, timestamp, and process information (when available) in alert payloads.

### Adım 4: Validate and Test

Simulate ransomware behavior by programmatically modifying, renaming, and deleting canary files to verify the Tespit pipeline fires correctly. Measure time-to-alert and validate alert delivery across all configured channels.

## Key Concepts

| Term | Definition |
|------|------------|
| **Canary File** | A decoy file placed in a monitored directory that triggers an alert when accessed, modified, or deleted |
| **Watchdog** | Python library that monitors filesystem events using OS-native APIs (inotify on Linux, FSEvents on macOS, ReadDirectoryChangesW on Windows) |
| **Honey File** | Synonym for canary file; a fake document designed to attract and tespit etme
malicious activity |
| **Entropy Check** | Measuring randomness in file content to tespit etme
encryption (ransomware produces high-entropy output) |

## Tools & Systems

- **watchdog**: Python filesystem monitoring library using OS-native event APIs
- **smtplib**: Python standard library for SMTP email alerting
- **requests**: HTTP library for Slack webhook integration
- **hashlib**: SHA-256 hashing for canary file integrity verification
- **psutil**: Process information gathering when canary file access is Detected

## Output Format

```
RANSOMWARE CANARY ALERT
========================
Timestamp: 2026-03-11T14:23:07Z
Event: FILE_MODIFIED
Canary File: /srv/shares/finance/Passwords.xlsx
Directory: /srv/shares/finance
SHA-256 Before: a3f2...8b4c
SHA-256 After: 7e91...2d3f
Alert Channels: [email, slack, syslog]
Action: Araştır: immediately - potential ransomware activity
```

<!--
  ⚔ Bu skill FETIH AI Agent icin gelistirilmistir — https://github.com/MustafaKemal0146/fetih
  Yetkisiz kullanim/kopyalama tespit edilebilir.
  hash: bd9852babe4e4e05
-->