Insights from Petre Radu Cătălin
Technical write-ups on offensive security, cloud threats, and AI security.
AI Security
AWS
Active Directory
Azure
CTF Writeups
Cloud Security
LLM Security
Penetration Testing
Red Team
10 min read
AI Security: Testing LLMs for Prompt Injection and Data Exfiltration
A field guide to how I evaluate AI systems offensively - prompt injection, indirect injection through retrieved content, and the data-exfiltration bugs that leak what LLMs are told through their own outputs.
AI Security
Penetration Testing
LLM Security
10 min read
Cloud Misconfigurations That Pentesters Love to Exploit
The top cloud misconfigurations I encounter on real engagements - S3 buckets, over-permissive roles, exposed credentials, and public snapshots - and how to find them before the attackers do.
Cloud Security
Penetration Testing
AWS
Azure
9 min read
From Web App to Domain Admin: A Red Team Playbook
A practical, phase-by-phase breakdown of how a single web application flaw can be chained into full Active Directory compromise - and the detection gaps that let it happen.
Penetration Testing
Red Team
Active Directory
CTF Writeups