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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.

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  • Threat Landscape + Targeted Industries – Today’s threat actors. Distinctive TTPs and areas of expertise. Targeted industries distribution.
  • BLA + Identity Manipulation – BLA basics and significance. Sophistication levels. Distribution analysis. Cross-platform switching analysis. Security implications and recommendations.
  • API Exploitations in Credential Stuffing – Distribution across industries. API targeting throughout attacks steps and across attack phases. Shadow API exploitation and targeting techniques.
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