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Multi-engine malware scanner for checking suspicious files against several antivirus engines.

Malware knowledge base with actor, family, sample, and reference information for researchers.

Security lookup platform for scanning files, hashes, URLs, IPs, and domains against threat data.

Threat analysis service for URLs, files, certificates, domains, and suspicious hashes.

Browser extension for searching IPs, domains, hashes, URLs, and indicators across threat intelligence services.

packet.guru

packet.guru

packet.guru helps search threat intelligence, IP reputation, domains, and security investigation data.

Open-source ransomware monitoring project indexing group posts for defensive research.

Open-source tracker monitoring ransomware leak sites and publishing structured status data.

Shadowserver

dashboard.shadowserver.org

Shadowserver helps search threat intelligence, IP reputation, domains, and security investigation data.

GitHub malware research repository containing live samples for controlled analysis environments.

Security scanning service for checking files, URLs, domains, and hashes across many detection engines.

Historical malware archive mirrored by vx-underground for research and preservation.

Open source intelligence toolkit for gathering and analyzing information from websites and online sources.

Breach hunting tool that checks emails against breach data sources and local leak collections.

Python OSINT tool that checks whether a phone number is linked to accounts on popular online services.

An open source tool for searching usernames across many websites to help with online identity research.

Uses AI agents to complete tasks, coordinate tools or automate multi-step workflows.

Technology publication reporting on computing, science, security, policy, hardware and software.

Security tool for identifying Azure tenant information during cloud security research and assessments.

Censys

censys.com

Cybersecurity company and search engine.

Browser-based tool for encoding, decoding, hashing, encryption, data conversion, and cyber analysis workflows.

Bulk asynchronous downloader for multiple file hosts

Database of mycological literature.

Reporting and explainers on dark-web activity, leak sites and underground cybercrime.