Cyber Threat Analyst | Malware Intelligence | Systems Engineering

Translating adversary tradecraft into actionable defensive controls.

Currently working in Cyber Threat Intelligence (CTI) at Telefónica Tech. I focus on connecting the low-level mechanics of malware execution with the high-level discipline of detection engineering — from binary behavior to deployable detection logic.

• Malware Intelligence & Reverse Engineering: Static and dynamic analysis of PE/ELF binaries, IOC extraction, and behavioral profiling using Ghidra, GDB, and x64dbg.
• Detection Engineering: Writing high-fidelity YARA and Sigma rules mapped to the MITRE ATT&CK framework.
• Low-Level Systems: Strong foundation in C/C++, memory management, OS internals, and Unix/Linux interfaces (42 Network core curriculum).
• CTI Automation: Developing Python tooling for threat analysis and integrating CTI platforms and enrichment APIs.

Ubuntu-22.04-LTS-Hardening Review-first baseline hardening. Idempotent Bash scripting and documented threat models for securing Ubuntu hosts, emphasizing dry-runs and rollback capabilities.

42-Systems-Programming Advanced C / Unix portfolio. Implementation of standard C library functions, memory allocators, and Unix system calls built from scratch as part of the 42 Network rigorous curriculum.

INE-Cybersecurity-Certifications-Guide Comprehensive study guides for INE Security certifications. Eleven self-contained modules covering core foundations, offensive security, defensive operations, and emerging technologies (from eJPT through eIAMA), including methodologies, tool overviews, practical lab walkthroughs, and concise quick-reference cheat sheets.

For vulnerability disclosures or professional inquiries:

• Network: LinkedIn
• Media: YouTube / @MartinEliseoRR