Formal education
| 2024 - | Ph.D. degree | Computer Science, University of São Paulo (USP) |
|---|---|---|
| 2023 - 2024 | Master's degree | Management and Technology, Centro Paula Souza (CPS/FATEC-SP) |
| 2019 - 2022 | Bachelor of Technology | Computer Systems Networking, Federal Institute of Rio Grande do Norte (IFRN) |
Research interests
Malware Analysis and Detection
Reverse Engineering
Forensics
Binary Exploitation
Blockchain
Operating Systems
Artificial Intelligence
Professional experience
[2023 - Present] Digital Forensics and Incident Response Specialist - Kaspersky Lab
- Joined Kaspersky's Global Emergency Response Team (GERT).
[2021 - 2023] Cybersecurity Consultant & Professor - Daryus Consultoria e Treinamento
- Conducted penetration testing in web applications, infrastructures, and mobile applications.
- Performed reverse engineering of PE and APK files.
- Conducted computer forensics investigations.
- Conducted cloud computing audits to ensure security best practices were followed.
- Provided guidance on secure development practices.
- Led red team exercises to identify vulnerabilities in organizations' security defenses.
- Designed and executed phishing campaigns to raise awareness and test employees' security awareness.
- Led the creation and implementation of robust incident response playbooks, optimizing response strategies for swift and effective resolution.
- Actively contributed to ISO 27001 audits, ensuring adherence to information security standards.
- Conducted audits of critical systems to ensure they meet security standards.
- As a professor of post-graduate courses, instructed students in various topics related to information security, including: Malware analysis and reverse engineering; Mobile and wireless penetration testing; Incident response; Windows & Linux security; Secure programming; Network security; and IoT security.
- Instructed courses in web application security, secure programming, and ethical hacking, with a focus on the following topics: OWASP Top 10 and Secure Coding Practices; OWASP Proactive Controls and API Security; SAST, DAST, and SCA techniques; DevOps and DevSecOps methodologies; Threat modeling for software security; Network, web application, and wireless network penetration testing.
- Additionally, taught other related courses, such as Penetration Testing, Open-source Intelligence (OSINT), Ethical Hacking Foundation, Secure Programming Foundation, and NIST Cybersecurity Framework.
[2016 - 2022] Researcher, R&D Software Developer, and Tutor - Federal Institute of Rio Grande do Norte
- Conducted research in information security, focusing on malware analysis and detection, software-defined networks, and moving target defense.
- Authored and published research papers in multiple conferences and journals to share findings and contribute to advancements in the fields.
- Conducted research in computer vision and image processing and developed practical applications in the field.
- Designed and developed an ALPR (Automatic License Plate Recognition) application for embedded hardware, with a patent application filed.
- Developed an OCR (Optical Character Recognition) application to extract text from images.
- Created a deep learning-based face recognition application and API.
- Main programming languages: Java and Python.
- Other technologies: OpenCV, dlib, REST, Flask, MySQL, RFID.
- Provided support to students studying operating systems, offering guidance and assistance with course materials.
- Provided assistance to students studying algorithms and data structures, offering guidance and support with course materials.
[2020 - 2021] Back-end Developer - SutHub
- Designed and developed multiple Robotic Process Automation (RPA) tools to automate repetitive tasks and improve productivity.
- Conducted Static Application Security Testing (SAST) in the core system to identify and mitigate potential security risks.
- Main programming language: Python.
- Other technologies: Selenium, AWS (EC2, CloudWatch, and S3), MySQL.
[2018 - 2019] Information Security Analyst - Actions Security
- Helped develop a Web Application Firewall (WAF).
- Utilized Elastic Stack, Docker containers, and reverse proxies to achieve project goals.
- Successfully implemented an OpenStack infrastructure, enabling increased efficiency and scalability.
- Conducted penetration tests in web applications to identify security vulnerabilities.
- Main programming languages: Python and C.
- Other tools and technologies: OWASP Top 10, AWS, OpenStack, ModSecurity, Linux.
Skills
- Languages:
Portuguese (native)
English (fluent)
Spanish (intermediate)
- Programming:
- Assembly, C, Java, Python, Shell Script, SQL, YARA
- Security:
- Computer Forensics, Malware Analysis, Reverse Engineering, Threat Intelligence, Binary Exploitation, Penetration Testing, Linux & Unix Administration, OWASP Top 10
- Tools and Frameworks:
- IDA, Ghidra, WinDbg, x64dbg, Suricata, FTK, The Sleuth Kit, Autopsy, Volatility, Velociraptor, Wireshark, Nmap, Metasploit, Git, LaTeX, Docker, Scapy, scikit-learn, Elastic Stack, Flask, REST, AWS
Complementary education
| 2026 - 2026 | Postgraduate degree | Forensic Sciences and Criminal Investigation, Faculdade de Minas (FACUMINAS) |
|---|---|---|
| 2022 - 2023 | Postgraduate degree | Digital Forensics and Cyber Investigation, Instituto Daryus de Ensino Superior Paulista (IDESP) |
| 2022 - 2022 | Postgraduate degree | Ethical Hacking and Cybersecurity, Centro de Inovação VincIT (UNICIV) |
| 2018 - 2019 | Certificate program | Electronics, Digital Metropolis Institute (IMD) |
| 2015 - 2018 | Certificate program | Informatics, Federal Institute of Rio Grande do Norte (IFRN) |
Certifications
| Certified Information Systems Security Professional (CISSP) | (ISC)² | Credential ID: 1068081 |
|---|---|---|
| Offensive Security Exploit Developer (OSED) | Offensive Security | Credential ID: 57211857 |
| Offensive Security Certified Professional (OSCP) | Offensive Security | Credential ID: 57211857 |
| GIAC Experienced Forensics Analyst (GX-FA) | SANS Institute | Credential ID: 131 |
| GIAC Experienced Forensics Examiner (GX-FE) | SANS Institute | Credential ID: 107 |
| GIAC Experienced Incident Handler (GX-IH) | SANS Institute | Credential ID: 488 |
| GIAC Experienced Cybersecurity Specialist (GX-CS) | SANS Institute | Credential ID: 461 |
| GIAC Certified Forensic Analyst (GCFA) | SANS Institute | Credential ID: 23066 |
| GIAC Certified Forensic Examiner (GCFE) | SANS Institute | Credential ID: 10619 |
| GIAC Reverse Engineering Malware (GREM) | SANS Institute | Credential ID: 9604 |
| GIAC Exploit Researcher and Advanced Penetration Tester (GXPN) | SANS Institute | Credential ID: 4045 |
| GIAC Response and Industrial Defense (GRID) | SANS Institute | Credential ID: 2290 |
| GIAC Linux Incident Responder (GLIR) | SANS Institute | Credential ID: 213 |
| GIAC Certified Incident Handler (GCIH) | SANS Institute | Credential ID: 50983 |
| GIAC Cyber Threat Intelligence (GCTI) | SANS Institute | Credential ID: 4606 |
| CompTIA Advanced Security Practitioner (CASP+) | CompTIA | Credential ID: WSLN0QL5NME1115Z |
| ISO/IEC 27001 Lead Auditor | PECB | Credential ID: ISLA1119651-2023-06 |
| Certified Computer Hacking Forensics Investigator (CHFI) | EC-Council | Credential ID: ECC9027651384 |
| Certified Ethical Hacker (Practical) | EC-Council | Credential ID: ECC5379860241 |
| Certified Ethical Hacker (CEH) | EC-Council | Credential ID: ECC8169403257 |
| Pentest+ | CompTIA | Credential ID: 1035ZEWSF1Q415WQ |
| BSD Specialist | Linux Professional Institute | Credential ID: LPI000393801 |
| LPIC-3: Security | Linux Professional Institute | Credential ID: LPI000393801 |
| LPIC-3: Virtualization and Containerization | Linux Professional Institute | Credential ID: LPI000393801 |
| LPIC-2: Linux Engineer | Linux Professional Institute | Credential ID: LPI000393801 |
| LPIC-1: Linux Administrator | Linux Professional Institute | Credential ID: LPI000393801 |
| Linux+ | CompTIA | Credential ID: 9BSTQ4TM5LEE1GKT |
| Certified in Cybersecurity | (ISC)² | Credential ID: 1068081 |
Honors & Awards
| 2026 | 3rd place (solo), SBSeg/FIRST CTF |
|---|---|
| 2025 | GIAC Security Expert (GSE) #409 |
| 2025 | GIAC Security Professional (GSP) #479 |
| 2025 | Best Paper Award, XXV SBSeg |
| 2025 | Youth Digital Ambassador, Global Digital Forum |
| 2025 | Top-3 Nominees, Global Digital Forum |
| 2025 | Outstanding Reviewer Award, XLIII SBRC |
| 2024 | GIAC Advisory Board |
| 2023 | CEH Master |
| 2022 | Academic Honors Diploma (Summa Cum Laude) |
| 2022 | Distinguished Paper Award, XL SBRC |
| 2018 | Capture The Flag Champion |
Vulnerability disclosures
| 2025 | CVE-2025-7771 | Code Execution | 8.7 HIGH | CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
|---|---|---|---|---|
| 2019 | CVE-2019-7634 | Cross-site Scripting (XSS) | 5.4 MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Patents & Software
| BR 10 2018 015493 1 | Patent | Embedded System for Automatic License Plate Recognition |
|---|---|---|
| BR 51 2024 001975 8 | Software | Heimdall-NG - Interface administrativa |
| BR 51 2024 000157 3 | Software | Heimdall: Solução para detecção de artefatos maliciosos em ambientes IoT por meio de machine learning |
| BR 51 2022 002010 6 | Software | PhishKiller |
| BR 51 2019 000141 9 | Software | NAVI Face Recognition API |
| BR 51 2019 000143 5 | Software | NAVI RPi Face Recognition |
| BR 51 2019 000144 3 | Software | NAVI-ALPR |
| BR 51 2019 000140 0 | Software | Embedded System for Rainfall Measurement and SNMP Management |
| BR 51 2018 000086 0 | Software | OCR-NAVI |
Academic service
Journal Reviewer
- Cluster Computing - Springer Nature
- Computer Communications - Elsevier
- Computers & Security - Elsevier
- Computing - Springer Nature
- Discover Artificial Intelligence - Springer Nature
- Discover Computing - Springer Nature
- Discover Internet of Things - Springer Nature
- Discover Networks - Springer Nature
- Engineering Applications of Artificial Intelligence - Elsevier
- International Journal of Cognitive Computing in Engineering (IJCCE) - Elsevier
- International Journal of Computational Intelligence Systems - Springer Nature
- International Journal of Information Security - Springer Nature
- International Journal of Machine Learning and Cybernetics - Springer Nature
- International Journal of Networked and Distributed Computing - Springer Nature
- Internet of Things - Elsevier
- Journal of Cloud Computing - Springer Nature
- Journal of Information Security and Applications - Elsevier
- Journal of Network and Systems Management - Springer Nature
- Journal on Information Security - Springer Nature
- Peer-to-Peer Networking and Applications - Springer Nature
- Progress in Artificial Intelligence - Springer Nature
- Scientific Reports - Springer Nature
- Telecommunication Systems - Springer Nature
- The Journal of Supercomputing - Springer Nature
- Wireless Networks - Springer Nature
- Wireless Personal Communications - Springer Nature
Conference Reviewer
- XXVI Brazilian Symposium on Cybersecurity (SBSeg 2026)
- XXV Brazilian Symposium on Cybersecurity (SBSeg 2025)
- XLIII Brazilian Symposium on Computer Networks and Distributed Systems (SBRC 2025)
Volunteering
[2022 - Present] OWASP Foundation
- As chapter leader, my responsibilities include efficiently maintaining the chapter, organizing engaging information security meetings, and conducting workshops.
[2015 - 2016] Federal Institute of Rio Grande do Norte
- Volunteered to develop a mobile app for monitoring water usage at IFRN (campus Natal Central).
CV
Media kit
Biography
Short (~70 words)
Cristian Souza is a Digital Forensics and Incident Response Specialist on Kaspersky's Global Emergency Response Team (GERT). He has a degree in Computer Systems Networking and is currently pursuing a Ph.D. in Computer Science at the University of São Paulo (USP). Cristian's primary responsibilities include conducting forensic analysis of critical incidents, identifying their root causes, and performing malware reverse engineering. He also holds several industry certifications, including the GIAC Security Expert (GSE).
Medium (~120 words)
Cristian Souza is a Digital Forensics and Incident Response Specialist on Kaspersky's Global Emergency Response Team (GERT), where he investigates critical incidents, identifies their root causes, and reverse engineers malware. Before Kaspersky, he worked as a penetration tester, cybersecurity consultant, and postgraduate professor. He is also a Ph.D. candidate in Computer Science at the University of São Paulo (USP). His research covers malware analysis and detection, reverse engineering, digital forensics, and binary exploitation, with work published in international journals and conferences. Cristian holds the GIAC Security Expert (GSE) certification, along with CISSP, OSED, OSCP, and GREM. An active contributor to the security community, he leads an OWASP chapter, develops open-source security tools, and reviews for more than 20 international academic journals.
Long (~200 words)
Cristian Souza is a Digital Forensics and Incident Response Specialist on Kaspersky's Global Emergency Response Team (GERT), where he investigates complex incidents, identifies their root causes, and reverse engineers malware. He began studying cybersecurity at the age of 11 and has since worked as a software developer, information security analyst, cybersecurity consultant, and postgraduate professor, with experience spanning penetration testing, red teaming, reverse engineering, and forensic investigations.
Cristian holds a degree in Computer Systems Networking from the Federal Institute of Rio Grande do Norte (IFRN), where he graduated with honors (summa cum laude), and a master's degree in Management and Technology. He is a Ph.D. candidate in Computer Science at the Institute of Mathematics and Statistics (IME) of the University of São Paulo (USP). His research on malware analysis, reverse engineering, digital forensics, and binary exploitation has appeared in international journals and conferences, with some earning best paper awards.
An open-source enthusiast, Cristian has contributed to several GitHub projects that help thousands of professionals in their work. He also leads an OWASP chapter and reviews for more than 20 international academic journals. His certifications span cybersecurity, digital forensics, and offensive security, including the GIAC Security Expert (GSE), CISSP, OSED, OSCP, GREM, GCFA, and GXPN.



