https://cristian.sh/blog/ Posts on cybersecurity, malware analysis, reverse engineering, and exploit development by Cristian Souza. en Sat, 26 Sep 2026 00:00:00 GMT https://cristian.sh/blog/posts/2026_09_egc.html https://cristian.sh/blog/posts/2026_09_egc.html Sat, 26 Sep 2026 00:00:00 GMT My participation in the 8th edition of the National Brazilian Cyber Defense Exercise (Exercício Guardião Cibernético 8.0). https://cristian.sh/blog/posts/2026_09_sbseg_ctf.html https://cristian.sh/blog/posts/2026_09_sbseg_ctf.html Sat, 12 Sep 2026 00:00:00 GMT My experience competing solo in the XXVI SBSeg CTF: the challenges, the final score, the awards, and some tips for future players. https://cristian.sh/blog/posts/2026_08_introducing_mxray.html https://cristian.sh/blog/posts/2026_08_introducing_mxray.html Sun, 23 Aug 2026 00:00:00 GMT Introducing MXRay, an e-mail forensics tool. https://cristian.sh/blog/posts/2025_02_bsd_711.html https://cristian.sh/blog/posts/2025_02_bsd_711.html Sun, 16 Feb 2025 00:00:00 GMT Topic 711: BSD Installation and Software Management. https://cristian.sh/blog/posts/2025_02_bsd_712.html https://cristian.sh/blog/posts/2025_02_bsd_712.html Sun, 16 Feb 2025 00:00:00 GMT Topic 712: Storage Devices and BSD Filesystems. https://cristian.sh/blog/posts/2025_02_bsd_713.html https://cristian.sh/blog/posts/2025_02_bsd_713.html Sun, 16 Feb 2025 00:00:00 GMT Topic 713: Basic BSD System Administration. https://cristian.sh/blog/posts/2025_02_bsd_714.html https://cristian.sh/blog/posts/2025_02_bsd_714.html Sun, 16 Feb 2025 00:00:00 GMT Topic 714: Basic BSD Network Administration. https://cristian.sh/blog/posts/2025_02_bsd_715.html https://cristian.sh/blog/posts/2025_02_bsd_715.html Sun, 16 Feb 2025 00:00:00 GMT Topic 715: Basic Unix Skills and Shell Scripting. https://cristian.sh/blog/posts/2024_09_how_i_passed_cissp.html https://cristian.sh/blog/posts/2024_09_how_i_passed_cissp.html Mon, 16 Sep 2024 00:00:00 GMT How I passed the CISSP exam. https://cristianzsh.medium.com/lpic-2-tópico-201-linux-kernel-9929b514c965 https://cristianzsh.medium.com/lpic-2-tópico-201-linux-kernel-9929b514c965 Sat, 08 Apr 2023 00:00:00 GMT LPIC-2 tópico 201: Linux Kernel. https://cristianzsh.medium.com/lpic-2-tópico-200-planejamento-de-capacidade-d70385604a8d https://cristianzsh.medium.com/lpic-2-tópico-200-planejamento-de-capacidade-d70385604a8d Thu, 06 Apr 2023 00:00:00 GMT LPIC-2 tópico 200: Planejamento de capacidade. https://cristianzsh.medium.com/construindo-a-sua-plataforma-de-threat-intelligence-com-o-opencti-6b2de6ed17cf https://cristianzsh.medium.com/construindo-a-sua-plataforma-de-threat-intelligence-com-o-opencti-6b2de6ed17cf Mon, 03 Apr 2023 00:00:00 GMT Construindo a sua plataforma de threat intelligence com o OpenCTI. https://cristian.sh/blog/posts/2023_01_cuckoo.html https://cristian.sh/blog/posts/2023_01_cuckoo.html Tue, 24 Jan 2023 00:00:00 GMT Instalando e utilizando o Cuckoo Sandbox. https://cristian.sh/blog/posts/2022_05_cve_2022_30190.html https://cristian.sh/blog/posts/2022_05_cve_2022_30190.html Sat, 04 Jun 2022 00:00:00 GMT Understanding the Follina vulnerability. https://cristian.sh/blog/posts/2022_04_blue_red_team.html https://cristian.sh/blog/posts/2022_04_blue_red_team.html Thu, 19 May 2022 00:00:00 GMT Blue Team vs Red Team. https://cristian.sh/blog/posts/2022_03_senha_segura.html https://cristian.sh/blog/posts/2022_03_senha_segura.html Thu, 05 May 2022 00:00:00 GMT Password best practices. https://cristian.sh/blog/posts/2022_02_pilares_seguranca.html https://cristian.sh/blog/posts/2022_02_pilares_seguranca.html Fri, 18 Mar 2022 00:00:00 GMT CIA triad. https://cristian.sh/blog/posts/2022_01_zero_trust.html https://cristian.sh/blog/posts/2022_01_zero_trust.html Thu, 24 Feb 2022 00:00:00 GMT Zero trust: the business benefits and advantages. https://cristian.sh/blog/posts/2020_03_installing_obsd.html https://cristian.sh/blog/posts/2020_03_installing_obsd.html Tue, 19 May 2020 00:00:00 GMT Step by step guide on installing OpenBSD. https://cristian.sh/blog/posts/2020_02_first_patch.html https://cristian.sh/blog/posts/2020_02_first_patch.html Wed, 29 Apr 2020 00:00:00 GMT Step by step guide on how to contribute to the Linux Kernel. https://cristian.sh/blog/posts/2020_01_first_cve.html https://cristian.sh/blog/posts/2020_01_first_cve.html Tue, 28 Apr 2020 00:00:00 GMT CVE-2019–7634: My first CVE.