rakuten-bank.co.jp Domain Breach Exposure Report

The telemetry indicates a significant exposure event impacting rakuten-bank.co.jp, with a high risk score of 96. The primary concern stems from 50,639 historical data breaches and 9,083 active infostealer logs, affecting approximately 59,568 clients and 154 employees over the period of July 2025 to June 2026. The data breaches are predominantly sourced from "Combolist sources," suggesting credential stuffing or similar attacks. Malware families like Rhadamanthys, LummaC2, and Redline are prevalent, indicating active compromise and data exfiltration attempts. The targeted services are primarily related to the "fes.rakuten-bank.co.jp" domain, suggesting a focus on customer-facing or internal banking portals. Given the high risk score and the nature of the events, this exposure requires immediate attention. The prevalence of infostealers and data breaches points to a high likelihood of sensitive client and employee information being compromised. Remediation efforts should focus on strengthening authentication mechanisms, enhancing endpoint security to detect and block infostealer malware, and conducting thorough investigations into the identified data breaches to understand the scope of compromised data and notify affected individuals. Continuous monitoring for new infostealer activity and credential compromise is also crucial.