Reducing Exposure to Bulletproof Hosting 

Cybercriminals increasingly rely on Bulletproof Hosting (BPH) providers—services that knowingly lease hosting, IP space, or entire ASNs to threat actors while ignoring abuse complaints and takedown requests. These networks provide a safe haven for malware delivery, phishing, fast-flux DNS, command-and-control, and data-extortion operations.

BPH infrastructure is often blended into legitimate networks, using leased IP blocks and rapidly rotating ASNs to evade detection. This creates a difficult balance for defenders: block too aggressively and risk disrupting legitimate services; block too narrowly and leave malicious infrastructure untouched.

The growth of BPH services amplifies cyber risk by enabling high-impact attacks such as ransomware, large-scale phishing, and data-extortion campaigns with minimal operational cost to attackers. Their constant infrastructure churn, cross-jurisdictional hosting, and opaque ownership make attribution and disruption significantly harder.

In this environment, intelligence-led visibility into BPH infrastructure is essential. Without the ability to identify malicious ASNs, TLDs, and traffic patterns, organisations remain reactive while adversaries exploit resilient hosting to operate at scale.

This report outlines how bulletproof hosting fuels modern cyber threats and provides clear, actionable strategies for reducing organisational exposure and improving resilience.