sh.st Domain Breach Exposure Report

The domain sh.st has experienced a significant number of data breach events, with 678 historical data breaches recorded, primarily originating from combolist sources. Additionally, 90 active infostealer logs were detected, with Redline, LummaC2, and Aurora being the most prevalent malware families. The timeline indicates a surge in both employee and client-related events in March and April 2026, suggesting a potential escalation in compromise activity. The majority of affected operating systems are Windows variants, with Windows 11 being the most common. The primary targeted services are login and authentication pages, indicating a focus on credential harvesting. The high volume of historical data breaches and active infostealer logs, coupled with the targeting of login pages, presents a critical risk of account compromise and further data exfiltration. Prioritization should focus on immediate remediation of exposed credentials, strengthening authentication mechanisms, and enhancing monitoring for infostealer activity. The prevalence of Windows 11 suggests that user endpoints are a key vector for these attacks.