Abstract The cybercriminal underground’s Initial Access Broker (IAB) marketplace has matured into a industrialized, commoditized supply chain that directly enables ransomware proliferation and poses escalating risks to sovereign economic security and critical infrastructure integrity as of February 2026. Actor User Big-Bro, operating in a prominent underground forum’s Access Market section, exemplifies this professionalization by listing … Leggi tutto Cybercriminal Initial Access Broker Ecosystem & Ransomware Supply Chain Vulnerabilities 2026 – Sovereign Security, Critical Infrastructure Exposure & Financial Forensics