Free & Open Source Security Tools

Discover community-driven and free security solutions. Complement your enterprise stack with zero-cost tools.

Browse 2,685 free & open source security tools tools

OPEN SOURCE

Mandos Cybersecurity Insights Logo

Blog providing cybersecurity, AI security, and leadership insights for CISOs

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Intel Owl Logo

An Open Source solution for management of Threat Intelligence at scale, integrating multiple analyzers and malware analysis tools.

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Incident Response Flowchart Logo

A structured approach to managing and responding to suspected security events or incidents.

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nudge4j Logo

nudge4j is a tool to control Java applications from the browser and experiment with live code.

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CAPA Logo

CAPA is a static analysis tool that detects and reports capabilities in executable files across multiple formats, mapping findings to MITRE ATT&CK tactics and techniques.

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SMB Access from Linux Cheat Sheet Logo

A comprehensive cheat sheet for accessing Windows systems from Linux hosts using smbclient and rpcclient tools, covering password management, user and group enumeration, and more.

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Microsoft Sentinel Security Playbooks Logo

A repository of sample security playbooks with ARM templates for Microsoft Sentinel that enable automated security orchestration and response capabilities.

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libsmraw Logo

A library to access and manipulate RAW image files.

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ThisisLegal.com Logo

Hacker wargames site with forums and tutorials, fostering a learning community.

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Yara Station Logo

Management portal for LoKi scanner with centralized database for scanning activities.

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AWS CloudHSM Logo

Manage single-tenant hardware security modules (HSMs) on AWS.

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Damn Small Vulnerable Web Logo

A deliberately vulnerable web application written in under 100 lines of Python code for educational purposes and web security testing.

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JSDetox Logo

A javascript malware analysis tool with backend code execution.

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FireEye IOCs Logo

Repository of IOCs provided under the Apache 2.0 license

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Recon-ng Framework Logo

A full-featured reconnaissance framework for web-based reconnaissance with a modular design.

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Inceptor Logo

A template-driven framework for creating custom evasion techniques to test Anti-Virus and EDR detection capabilities.

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Kaitai Struct Logo

A declarative language for describing binary data structures that compiles into parsers for multiple programming languages.

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BlackBox Logo

Safely store secrets in version control repositories with GPG encryption support.

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WebMax Tools Privacy Encoders / Decoders / Hash Generators Logo

Encode or encrypt strings to various hashes and formats, including MD5, SHA1, SHA256, URL encoding, Base64, and Base85.

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usbutils Logo

A collection of utilities for working with USB devices on Linux

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Red October Logo

Red October is a TLS-based encryption server that implements two-man rule authorization, requiring multiple users to collaborate for cryptographic operations.

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SP 800-82, Guide to Industrial Control Systems (ICS) Security Logo

A comprehensive guide to securing Industrial Control Systems (ICS) from cyber threats, published by NIST.

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Proxmark 3 Logo

The Proxmark III is a versatile device for sniffing, reading, and cloning RFID tags with strong community support.

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SandboxAPI Logo

A minimal, consistent API for building integrations with malware sandboxes

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RoboShadow Logo

Automated vulnerability assessment and remediation platform

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OSINTLeak Real-time OSINT Leak Intelligence Logo

Real-time OSINT monitoring for leaked credentials, data, and infrastructure

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Cybersec Feeds Logo

A threat intelligence aggregation service that consolidates and summarizes security updates from multiple sources to provide comprehensive cybersecurity situational awareness.

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TestSavant AI Security Assurance Platform Logo

AI security assurance platform for red-teaming, guardrails & compliance

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Mandos Brief Logo

Weekly cybersecurity newsletter covering security incidents, AI, and leadership

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