suruga-ya.jp Domain Breach Exposure Report

The domain suruga-ya.jp has experienced a significant exposure event, with 16,240 historical data breaches and 2,097 active infostealer logs detected over the reporting period. The majority of these events are attributed to "Combolist sources" within leak repositories, indicating a high likelihood of credential stuffing attacks. The timeline shows a notable increase in client-related events from March 2026 onwards, coinciding with a rise in employee-related events, suggesting a potential compromise impacting both user accounts and internal systems. Malware families such as Rhadamanthys, LummaC2, and Acreed are prevalent, commonly associated with credential theft and data exfiltration. Given the high volume of data breaches and the presence of active infostealer logs, this exposure poses a critical risk to the organization and its users. The focus should be on immediate remediation of compromised credentials, strengthening authentication mechanisms, and conducting thorough security audits to identify and close any vulnerabilities exploited by the observed malware families. Prioritizing the investigation of the "Combolist sources" and understanding the attack vectors used to populate them is crucial for preventing future incidents.