
opencti
Open Cyber Threat Intelligence Platform

Open Cyber Threat Intelligence Platform

Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.

Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.

Sublime rules for email attack detection, prevention, and threat hunting.

Paperweight scans your inbox to map your digital footprint, then helps you take back control and delete your data. Local-first and open source.

Spam filtering and email processing framework with regex rules, statistical analysis, custom Lua plugins, and external blocklists for MTA integration.

Real-time malicious traffic detection system using public blacklists, static malware trails, and heuristic analysis to identify threats across DNS,…

Automation to assess the state of your M365 tenant against CISA's baselines

SQL powered operating system instrumentation, monitoring, and analytics.

MISP (core software) - Open Source Threat Intelligence and Sharing Platform

A Python package and CLI for parsing aggregate and forensic DMARC reports

Real-time cloud-native runtime security agent for Linux that monitors syscalls and container/Kubernetes metadata to detect anomalous behavior and…

The exploit server for out-of-band findings. Point a target at a domain you own. Every HTTP request and every email it sends back lands in a…

🦄 A curated list of privacy & security-focused software and services

Defensive detection kit for CVE-2026-76461, a critical SQL injection in Cisco Secure Email Gateway, with Sigma and YARA rules, IOCs, and remediation…


Open-source XDR and SIEM platform for threat detection, log analysis, file integrity monitoring, vulnerability assessment, and compliance management…

Research repository for CVE-2026-76461, a critical SQL injection in Cisco Secure Email Gateway leading to root RCE, with detection rules, mitigation…