Valkan is a sophisticated network scanning tool designed for ethical hacking and vulnerability assessment within controlled and authorized environments. This powerful application specifically targets legitimate network scanning and vulnerability exploitation, facilitating offensive security testing and auditing with the necessary permissions from system owners. Valkan’s key strengths lie in its modular architecture, high performance, and ability to conduct thorough network assessments.

Objective

Valkan’s goal is to provide a robust platform for:

• Network scanning across ports from 1–1024 or the entire range, identifying open services and potential vulnerabilities.
• Its modular engine supports various components including a Reporter, Detector, an HTTP Module, and a CLI-based terminal interface.
• Developed using Go (Golang), ensuring high performance, concurrent scanning capabilities, and minimal memory usage.

Features

• Comprehensive concurrent port scanning for both TCP and UDP.
• Banner grabbing functionality to capture service details.
• Silent firewall detection to assess network defenses without alerting.
• Reporting options in both JSON format and terminal output.
• A user-friendly CLI interface built with Cobra.
• An evolving Web UI for visual scan management, currently under development.
• OS fingerprinting, CVE matching, web technology detection, directory fuzzing, and more features are planned for future updates.

Architecture

The modular design of Valkan encompasses:

• Scanner Module for rapid port detection.
• Detector Module to analyze open ports and identify vulnerabilities.
• Reporter Module for structured output of scan results in various formats.
• HTTP Module for extracting HTTP metadata and status codes.
• System Info Layer for detecting the operating system and hardware specifications.
• A future Web UI to enhance user interactions with the tool.

Technologies

Valkan is built with:

• Go (Golang) for core functionalities and performance.
• Various libraries including cobra for CLI construction, and net for network operations, ensuring efficient and effective scanning capabilities.

This open-source project welcomes contributions focused on educational improvements and new feature implementations. For those interested in enhancing Valkan or discovering its capabilities, the tool is available for download on its website: Valkan Website.

Valkan stands out as a crucial asset for cybersecurity professionals engaged in authorized penetration testing efforts, ensuring thorough assessments with a focus on integrity and ethical standards.