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FangDefang - IoC Defanging Tool

Overview

FangDefang is a browser extension that helps security professionals, analysts, and researchers safely handle potentially malicious IoCs. The extension provides tools to defang (make safe) and fang (restore) URLs, domains, IP addresses, and email addresses, making it easier to share and analyze potentially dangerous IoCs without the risk of accidental interaction.

Key Features

IoC Defanging

• Convert IoCs to a safe format by replacing dangerous characters
• Support for multiple IoC types:
• URLs:
  • http:// → hxxp://
  • https:// → hxxps://
  • . → [.]
  • : → [:]
• Domains:
  • example.com → example[.]com
• IP Addresses:
  • 192.168.1.1 → 192[.]168[.]1[.]1
• Email Addresses:
  • user@example.com → user[@]example[.]com
• Preserve IoC structure while making it non-interactive
• Handle complex IoCs with various components

IoC Fangging

• Restore defanged IoCs to their original format
• Support for multiple defanging patterns
• Maintain IoC integrity during restoration
• Handle partially defanged IoCs

User Interface

• Clean, modern interface with dark and light themes
• Two processing modes:
• Single IoC processing
• Batch processing for multiple IoCs
• Easy-to-use controls with clear operation toggles
• Copy to clipboard functionality
• Export results to txt file

Context Menu Integration

• Right-click option that allows to copy an IoC defanged!
• Quick access to defanging functionality
• Copy defanged IoCs directly to clipboard

Customization

• Theme selection (dark/light)
• Toggle context menu integration
• Configure batch processing settings

Use Cases

• Security researchers sharing malicious IoCs
• Incident response teams documenting threats
• Malware analysts exchanging samples
• Security training and education
• Threat intelligence sharing
• SOC analysts documenting incidents
• Forensic investigators preserving evidence

Privacy & Security

• All processing happens locally in your browser
• No data is sent to external servers
• No tracking or analytics
• Minimal permissions required

Installation

1. Download the extension from the Chrome Web Store
2. Click "Add to Chrome"
3. Pin the extension to your toolbar for easy access

Support

For support, feature requests, or bug reports, please contact me here, via Email or on my Socials.