https://repositorio.ufu.br/handle/123456789/17904 Mon, 20 Jul 2026 04:15:13 GMT 2026-07-20T04:15:13Z https://repositorio.ufu.br/handle/123456789/48841 Title: Extração de tópicos de transcrições de vídeos do YouTube sobre desenvolvimento de software com LLMs Mon, 09 Mar 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48841 2026-03-09T00:00:00Z https://repositorio.ufu.br/handle/123456789/48814 Title: RISCraft-V: uso do Minecraft para a materialização de uma experiência que suporte o ensino de sistemas digitais e arquitetura e organização de computadores Abstract: The reinvention of learning processes has been a constant subject of investigation in contemporary society, especially given the current model of social networks, which is based on immediate reward stimuli, imposing the need to incorporate methodologies capable of making learning more interactive and fostering active student engagement. In this context, approaches aimed at redesigning educational processes with a focus on interactivity, such as serious games, have gained ground in the field of informatics in education, especially in teaching subjects that involve low-level computing, such as Digital Systems and Computer Architecture and Organization, which, by their very nature, require a greater capacity for abstraction on the part of students. The use of serious games proves to be an effective step towards the reinvention of learning processes, becoming even more productive when clearly supported by learning theories and by the use of narratives that favor immersion. However, the commonly adopted serious game experiences, for the most part, lack the combination of an explicit theoretical foundation in learning theories and the application of a non-disruptive learning assessment method, such as Silent Assessment. Given this context, this work aims to develop an immersive experience supported by the theory of socio-interactionism, which addresses fundamental concepts from the syllabus of Digital Systems (DS) and Computer Architecture and Organization (CAO) courses using Minecraft. RISCraft-V, when compared to other similar works, uniquely incorporates socio-interactionism, narrative-building tools, a multidisciplinary approach, serious games, and Silent Assessment for the development of an educational experience. The obtained results point to the potential of the experience to enrich the learning process in DS and CAO courses, also highlighting the possibility of adapting the experience towards an even more comprehensive approach. Wed, 25 Mar 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48814 2026-03-25T00:00:00Z https://repositorio.ufu.br/handle/123456789/48631 Title: Visualização e Interação no Tesouro Direto: Uma Análise de Usabilidade e Acessibilidade na Seção de Histórico de Preços e Taxas Fri, 20 Mar 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48631 2026-03-20T00:00:00Z https://repositorio.ufu.br/handle/123456789/48151 Title: Extração automatizada de chaves criptográficas em Ransomwares: uma abordagem forense baseada em AOB Abstract: Ransomware threats have emerged as a primary vector for cyberattacks, with incidence and the complexity of their techniques continuing to grow. Recent reports highlight the significant financial impacts of these attacks, with losses reaching millions of dollars per incident. Ransomware typically employs cryptographic mechanisms to encrypt files on compromised systems, making data recovery contingent on the payment of a ransom, generally associated with the receipt of the cryptographic key or a decryption tool. In this context, this work proposes an automated mechanism for extracting cryptographic keys from ransomware by analyzing volatile memory during malware execution. To gain greater control over the malware’s internal behavior and to enable reproducible experi ments, a custom ransomware sample was developed, inspired by notable strains such as WannaCry and LockBit. The proposed approach leverages AOB (Array of Bytes) signa tures to identify, in real-time, routines related to the generation and temporary storage of cryptographic keys in volatile memory. The experimental process involved static analysis with IDA Free, dynamic memory inspection with Cheat Engine, and the development of an automated tool, AOBTool. The results indicate that the cryptographic key can be located and extracted from memory before it is disposed of, within a timeframe shorter than that required to complete the file encryption process. This highlights the potential of the proposed technique as a valuable support tool for digital forensics and for mitigating ransomware-related incidents. Fri, 19 Dec 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48151 2025-12-19T00:00:00Z