analyzing-typosquatting-domains-with-dnstwist

# Analyzing Typosquatting Domains with DNSTwist ## Overview DNSTwist is a domain name permutation engine that generates similar-looking domain names to detect typosquatting, homograph phishing attacks, and brand impersonation. It creates thousands of domain permutations using techniques like character substitution, transposition, insertion, omission, and homoglyph replacement, then checks DNS records (A, AAAA, NS, MX), calculates web page similarity using fuzzy hashing (ssdeep) and perceptual hashing (pHash), and identifies potentially malicious registered domains. ## When to Use - When investigating security incidents that require analyzing typosquatting domains with dnstwist - When building detection rules or threat hunting queries for this domain - When SOC analysts need structured procedures for this analysis type - When validating security monitoring coverage for related attack techniques ## Prerequisites - Python 3.9+ with `dnstwist` installed (`pip install dnstwist[full]`) - Optional: GeoIP database for IP geolocation - Optional: Shodan API key for enrichment - Network access to perform DNS queries - Understanding of DNS record types and domain registration ## Key Concepts ### Domain Permutation Techniques DNSTwist generates permutations using: addition (appending characters), bitsquatting (bit-flip errors), homoglyph (visually similar Unicode characters like rn vs m), hyphenation (adding hyphens), insertion (inserting characters), omission (removing characte...