hosyusokuhou.jp Domain Breach Exposure Report

The telemetry indicates a significant exposure event impacting the domain hosyusokuhou.jp, with a total of 383 recorded events over the period of July 2025 to June 2026. A substantial portion of these events, 292 (76.2%), are classified as historical data breaches, primarily originating from "Combolist sources." Additionally, 91 (23.8%) events are identified as active infostealer logs, with "Redline" and "LummaC2" being the most prevalent malware families observed. The exposure appears to have escalated in March 2026, with a notable increase in both employee and client-related events, suggesting a potential compromise of credentials or sensitive information. The targeted services are predominantly related to the hosyusokuhou.jp domain and its login functionalities, indicating a focus on credential harvesting. The high volume of historical data breaches, coupled with active infostealer activity, presents a considerable risk of account takeover, identity theft, and further data exfiltration. The observed malware families, Redline and LummaC2, are known for their ability to steal credentials and sensitive data from infected systems. The timeline shows a sharp increase in client-related events from March 2026 onwards, suggesting that client data may be at risk. Prioritization should focus on immediate remediation of identified vulnerabilities, credential reset for affected users, and enhanced monitoring for suspicious activities targeting the hosyusokuhou.jp domain and its associated services. The geographical breakdown shows a concentration of affected systems in the United States, Germany, and China, which may warrant targeted investigations and communication.