Case Study: DomainHunter improves malicious domain threat profiling with WhoisXML API WHOIS data

DomainHunter & WhoisXML API Detecting and Profiling Potentially Malicious Domains

DomainHunter, a cybersecurity developer in the U.S., needed a better way to detect and profile potentially malicious domains tied to phishing and malware distribution. To give security teams more context than a simple domain list, it turned to WhoisXML API and its WHOIS API to enrich suspicious domains with registration and ownership intelligence.

WhoisXML API helped DomainHunter build a Cloudflare Worker wrapper around WHOIS API to extract registrar details, registration and expiration dates, name servers, IP addresses, registrant information, and historical registration data. This enabled comprehensive threat profiles and real-time Slack alerts with concise domain summaries, helping security teams assess suspicious domains quickly and improve threat detection and response.

DomainHunter

Justin Paine

Cybersecurity Developer