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Community threat intelligence platform for indicators, pulses, malware, and attack research.

Malware research archive with papers, samples, writeups, and historical security material.

constant popups documents a safety warning, scam report, malware concern, or risky download example.

unsafe extension documents a safety warning, scam report, malware concern, or risky download example.

GitHub collection of APT reports, threat actor notes, and security research documents.

Fortinet threat intelligence portal for security updates, IP reputation, malware, and web filtering data.

Guide to free and open source privacy tools, safer apps, and alternatives to data-heavy services.

Columbus Project is an advanced subdomain discovery service with fast, powerful and easy to use API.

Hash lookup service for checking password hashes against large precomputed cracking databases.

Threat intelligence search service for checking IPs, domains, hashes, and security indicators.

Reverse MD5 lookup service for checking whether an MD5 hash matches known plaintext.

Hash recovery service for checking password hashes and related encrypted password formats.

Google notebook environment for running Python code, experiments, data analysis, and research workflows.