Diego Fidalgo chengo

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    MY TOOLS. MY WORKFLOW. MY RESEARCH. AI POWERED.

    Offensive cybersecurity end to end: red teaming, penetration testing, adversary simulation and social engineering. 4+ years in cybersecurity, from scoping and testing through reporting, across Active Directory, web and mobile, cloud, EDR detection testing and AI red teaming.

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    Diego Fidalgo, chengo online. Offensive cybersecurity end to end: red teaming, penetration testing, adversary simulation and social engineering. The work spans Active Directory, web and mobile, cloud and Kubernetes, EDR testing and AI red teaming. 4+ years in cybersecurity. 10 entries on the certs page, the latest is HTB Certified Offensive AI Expert (COAE) from Hack The Box. The latest write-up is PortSwigger Academy Labs Walkthrough, published 31/08/2026. The latest blog note is AI Red Teamer by HackTheBox review, published 03/09/2026.
    04+ YEARS IN SECURITY
    10 CERTIFICATIONS
    56 WRITE-UPS
    writing 61 entries

    Recent writing

    Blog posts and write-ups, newest first.

    All blog All write-ups

    • RED TEAMING
    • PENETRATION TESTING
    • ACTIVE DIRECTORY
    • AI RED TEAMING
    • BloodHound
    • Rubeus
    • Mimikatz
    • PowerSploit
    • Impacket
    • NetExec
    • Certify
    • Burp Suite
    • SQLmap
    • Feroxbuster
    • MobSF
    • Frida
    • Havoc
    • Empire
    • Metasploit
    • Pentera
    • Horizon3
    • Nessus
    • Nmap
    • Nuclei
    • TestSSL
    projects and tools 4 projects all projects

    Projects and tools

    Public repositories and tools. Some of the work stays private.

    nmapviz

    active

    Drop nmap XML in and get an interactive node graph, with subnet clustering, port classification and version based vulnerability flags.

    pentest-screenshot

    active

    A Python tool that turns command output into report ready terminal screenshots, with highlights, redactions and a per engagement gallery.

    pokemon-randomizer-yao

    fork active

    A Gen 1 to Gen 7 Pokémon ROM randomizer built on Universal Pokemon Randomizer FVX, with a local web interface and a spoiler-safe HTML guide.

    opencode-ditto-room

    public

    A pixel-art Ditto room for the OpenCode TUI session sidebar.