Presented at
DEF CON 33 (2025),
Aug. 8, 2025, 1 p.m.
(45 minutes).
Have I Been Ransomed? is a specialized security service, akin to Have I Been Pwned, designed to detect personal data exposure specifically from ransomware leaks. As ransomware attacks increasingly involve data theft and public dumping, individuals need a way to check if their personally identifiable information has been compromised. Our platform goes beyond standard database checks by processing a wide array of leaked file types, including PDFs, documents, and text files. We employ advanced optical character recognition coupled with sophisticated large language models to meticulously scan unstructured data and extract sensitive identifiers such as national ID cards, driver’s licenses, and social security numbers. Have I Been Ransomed? provides critical awareness, empowering users to discover if their sensitive information has been exposed in a ransomware incident and enabling them to take proactive steps against potential identity theft and fraud.
Presenters:
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Juanma "M4C" Tejada
Juanma is a telecommunications engineer with a profound passion for drone technology and the complexities of hacking. His journey into the cybersecurity realm began unconventionally. Initial explorations through various online forums, driven by early curiosities, unexpectedly ignited a deep interest in the mechanics of data leaks, system breaches, and the evolving tactics of ransomware groups. This non-traditional path provided firsthand exposure to the cyber underground, equipping him with practical, real-world insights into attacker motivations and methodologies. This unique background grants him a grounded perspective, making him well-qualified to discuss the practical applications and implications within the current cybersecurity landscape.
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