seesaawiki.jp Domain Breach Exposure Report

The domain seesaawiki.jp has experienced a significant number of historical data breaches, totaling 306 events, which constitute 85% of all observed events. Additionally, there were 54 instances of active infostealer logs, representing 15% of the total events. The timeline indicates a surge in both employee and client-related events starting in March 2026, with a peak in April 2026. Malware families identified include Redline and LummaC2, with Windows 11 being the most targeted operating system. The primary source of data breaches appears to be combolist sources, suggesting credential stuffing or reuse of compromised credentials. This exposure presents a high risk due to the sheer volume of historical data breaches and the presence of active infostealer activity, indicating ongoing compromise or data exfiltration. The concentration of events in March and April 2026, affecting both employees and clients, requires immediate attention. Remediation efforts should focus on credential hygiene, including mandatory password resets, multi-factor authentication enforcement, and enhanced monitoring for suspicious login activity on seesaawiki.jp and its associated login pages. Investigating the root cause of the combolist-derived breaches is critical to prevent future occurrences.