JA3 is a method for creating SSL/TLS client fingerprints that can be easily shared for threat intelligence. It was invented at Salesforce in 2017 but is now maintained by John Althouse at FoxIO-LLC. The project includes JA3 and JA3S scripts for Zeek and Python, with support added to various cybersecurity tools and platforms.
FEATURES
ALTERNATIVES
Tool used to scan a range of IP addresses to identify active hosts and gather information about them.
A fast and flexible web fuzzer for identifying vulnerabilities in web applications
mitmproxy is an interactive, SSL/TLS-capable intercepting proxy with a console interface for HTTP/1, HTTP/2, and WebSockets.
netsniff-ng is a free Linux networking toolkit with zero-copy mechanisms for network development, analysis, and auditing.
A multiplatform C++ library for capturing, parsing, and crafting network packets with support for various network protocols.
Open-source set of libraries and drivers to accelerate network performance.
PINNED

Mandos Brief Newsletter
A weekly newsletter providing cybersecurity leadership insights, industry updates, and strategic guidance for security professionals advancing to management positions.

PTJunior
An AI-powered penetration testing platform that autonomously discovers, exploits, and documents vulnerabilities while generating NIST-compliant reports.

CTIChef.com Detection Feeds
A tiered cyber threat intelligence service providing detection rules from public repositories with varying levels of analysis, processing, and guidance for security teams.

ImmuniWeb® Discovery
ImmuniWeb Discovery is an attack surface management platform that continuously monitors an organization's external digital assets for security vulnerabilities, misconfigurations, and threats across domains, applications, cloud resources, and the dark web.

Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.

Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.

DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.