Malware analysis and sample repositories
- VirusTotal - Definitely most popular malware repository, unfortunately most of the features are only available in paid version.
- HybridAnalysis - free VT alternative enabling YARA search and downloading samples.
Network infrastructure analysis
- Hurrican Electric BGP Toolkit
- MXToolbox SuperTool
- PassiveTotal - unfortunately community edition has been downgraded in terms of functionality significantly.
- NerdyData - website searched based on tech stack used.
- crt.sh - TLS certificates transparency logs.
- GreyHatWarfare - searches for unprotected resources such as open AWS buckets.
- Google Maps
- Google Earth
- Bing Maps
- Baidu Maps
- Zoom Earth
- World Imagery Wayback
- SentinelHub Playground
- SentinelHub EO Browser
- SunCalc - determining time when picture was taken based on shadows.
- Flags of the World
- CIA World Maps
- WhaleWisdom - tracking hedge funds transactions.
- Edgar - US SEC search engine.
- Bundesanzeiger - German federal law and company information register.
- Companies House UK
- Search engine of the National Court Register
- Central Register of Real Beneficiaries
- BIN search engine
- Corporate Tax Haven Index
- Bitcoin wallet explorer
- UK Companies House
- OCCRP Aleph - The global archive of research material for investigative reporting
- WSJ Risk and Compliance Journal
- Trumail email verification
- I know - username search and verification.
- Followerwonk - Twitter followers analytics.
- Spoonbill - tracking Twitter bio changes.
- Gramhir - Instagram analyzer