biglobe.ne.jp Domain Breach Exposure Report

The telemetry indicates a significant exposure event affecting biglobe.ne.jp, with a total of 45,546 recorded events between July 2025 and June 2026. A substantial portion of these events, 40,503, are classified as historical data breaches, with an additional 5,043 events related to active infostealer logs. The data suggests a high volume of client-related events (37,449) compared to employee-related events (8,097), indicating a broader impact on the user base. Malware families such as LummaC2, Vidar, and Redline are prominently featured, suggesting potential credential harvesting and data exfiltration activities. The majority of the data breach evidence originates from "Combolist sources" and "Database dumps," implying compromised credentials and large-scale data leaks. The high risk score of 100, coupled with the prevalence of data breaches and infostealer activity, necessitates immediate attention. The primary focus for remediation should be on securing user credentials, investigating the source of the "Combolist sources" and "Database dumps," and enhancing defenses against the identified malware families. Given the nature of the services targeted, which include login and authentication endpoints, a thorough review of access control mechanisms and potential vulnerabilities within the single sign-on infrastructure is critical. The geographical breakdown shows a concentration of activity originating from Japan, aligning with the domain's origin.