fc2.com Domain Breach Exposure Report

The domain fc2.com is associated with a high-risk exposure, primarily driven by a significant volume of historical data breaches and active infostealer logs. Over the reporting period, 165,817 historical data breaches and 29,719 active infostealer logs were observed, impacting 195,388 clients and 148 employees. The data suggests a widespread compromise, with malware families like Redline, Rhadamanthys, and LummaC2 being prevalent, indicating a focus on credential harvesting and data exfiltration. The majority of the observed data originates from combolist sources, further reinforcing the nature of these breaches. Given the high volume of data breaches and infostealer activity, this exposure presents a critical risk. The prevalence of credential-stealing malware targeting services like fc2.com login pages and secure ID portals indicates a direct threat to user accounts and potentially sensitive information. Prioritization should focus on immediate incident response, comprehensive forensic analysis to understand the full scope of compromised data, and robust remediation efforts including credential resets, enhanced monitoring, and security awareness training for affected employees and clients. The primary geographic origin of the observed data is Japan, followed by Taiwan and South Korea.