Cyberattack at Heat Containment Materials Maker, HarbisonWalker International
Pittsburgh, Pennsylvania-based refractory products maker, HarbisonWalker International (HWI), suffered a cyberattack where personally identifiable information ended up stolen in the hack.
Forensic disclosures confirmed on September 22–23, 2026, reveal an extortion-driven threat syndicate infiltrated HWI’s corporate enterprise network, traversed IT/OT boundaries, and exfiltrated over 450 gigabytes of sensitive corporate data, according to a report with Sh3llc0d3, an advanced offensive security research lab, threat intelligence platform, and cybersecurity blog focused on ethical hacking, vulnerability analysis, and APT (Advanced Persistent Threat) tracking.
Beyond proprietary refractory material formulas and industrial manufacturing schedules, the actors accessed and extracted executive treasury files, corporate banking ledgers, and wire transfer authorization manifests before deploying secondary extortion demands.