The Invisible Breach: Business Logic Manipulation and API Exploitation in Credential Stuffing Attacks

This comprehensive analysis examines 100 advanced credential stuffing configurations deployed through the SilverBullet tool, revealing a fundamental transformation in how threat actors approach account takeover (ATO) automated operations. The research, conducted between December 2024 and May 2025, reveals sophisticated attack methodologies that surpass traditional password-spraying techniques, indicating the emergence of business logic, API and identity exploitation as the primary attack vectors in modern credential stuffing campaigns.