hii.com Domain Breach Exposure Report

The telemetry indicates a significant exposure of 569 historical data breaches and 4 active infostealer logs, affecting 386 employees and 187 clients over a 12-month period. The majority of the exposure, 99.3%, stems from historical data breaches, with a notable spike in employee and client compromise observed in August 2025 and September 2025, and again in January 2026 and February 2026. Malware analysis reveals Rhadamanthys and Vidar infostealers were active, primarily targeting Windows 11 operating systems. The data originates from "Combolist sources" and "Database dumps" repositories, with a small presence in the United States. Given the high volume of historical data breaches and the presence of active infostealer logs, the risk priority is high. The focus for remediation should be on comprehensive credential hygiene, including mandatory password resets for all affected employees and clients, implementing multi-factor authentication across all services, and enhancing monitoring for suspicious login activity. Further investigation into the root cause of the historical data breaches is also recommended to prevent recurrence.