hateblo.jp Domain Breach Exposure Report

The domain hateblo.jp has experienced a significant number of historical data breaches, totaling 310 events, and 70 active infostealer logs. The majority of these events are linked to "Combolist sources," indicating potential credential stuffing or account takeover attempts. The timeline shows a surge in client-related events from August 2025 through April 2026, with a notable increase in employee-related events starting in March 2026. Malware families identified include Redline and LummaC2, both known for credential theft. The primary operating system observed is Windows 11. Given the high volume of data breaches and active infostealer logs, this exposure presents a critical risk. The focus should be on immediate remediation of compromised credentials, enhancing authentication mechanisms, and conducting thorough security audits to identify and mitigate the root cause of these breaches. The prevalence of Windows 11 and the identified malware families suggest a need for enhanced endpoint security and user awareness training.