What Is IDOR? Finding and Preventing Insecure Direct Object References in AWS APIs

Learn what IDOR is, why it’s so common (and dangerous), see real AWS-related examples, and discover prevention and detection methods for robust API security.

June 27, 2025 · 5 min · 902 words · Javier Pulido

Getting Started with Amazon GuardDuty: Setup, Findings, and SIEM Integration

A comprehensive guide to setting up Amazon GuardDuty, interpreting its findings, and integrating with SIEM systems to bolster AWS security.

June 24, 2025 · 3 min · 609 words · Javier Pulido

Detecting Privilege Escalation in AWS Using CloudTrail and EventBridge

A deep technical guide to setting up AWS-native detection for privilege escalation using CloudTrail, EventBridge, and minimal infrastructure.

June 20, 2025 · 4 min · 734 words · Javier Pulido

Building a Hardened Amazon Linux 2 AMI for Secure EC2 Deployments

Step-by-step guide to build a hardened Amazon Linux 2 AMI with EC2 Image Builder including CIS benchmarks, IMDSv2 enforcement, auditd, and logging configuration.

June 9, 2025 · 3 min · 571 words · Javier Pulido

Enforcing Least Privilege in AWS IAM with Access Analyzer and Last Access Data

This article shows how to audit and refine IAM permissions using Access Analyzer, CloudTrail, and service access history — enforcing least privilege the right way in AWS.

June 9, 2025 · 3 min · 516 words · Javier Pulido

Securing EC2 Access with AWS Systems Manager Session Manager: Eliminating SSH

Introduction Traditional SSH access to EC2 instances poses several security challenges, including the management of SSH keys, exposure of ports, and lack of centralized auditing. AWS Systems Manager Session Manager offers a secure and auditable alternative, allowing you to manage EC2 instances without opening inbound ports or maintaining bastion hosts. This guide provides a step-by-step approach to configuring Session Manager for secure EC2 access, aligning with AWS’s official documentation and best practices. ...

June 3, 2025 · 7 min · 1324 words · Javier Pulido

Hardening EC2 Instances for AWS Security: A Practical Guide

This guide delves into the technical aspects of hardening EC2 instances, covering topics from instance selection to monitoring and automation, aligning with AWS’s security recommendations.

May 29, 2025 · 5 min · 857 words · Javier Pulido

I Built an AWS Incident Response Toolkit (and You Can Use It)

After publishing my free AWS IR checklist, I decided to go one step further — a full incident response toolkit with Terraform code, automation scripts, and ready-to-use templates. Here’s what’s inside.

May 20, 2025 · 2 min · 374 words · Javier Pulido

Monitoring AWS Security Events Without Breaking the Bank

Monitoring in AWS doesn’t have to be expensive. In this guide, we’ll walk through real-world strategies to detect and respond to security events in AWS without blowing your budget — using a mix of native tooling, automation, and open-source solutions. Table of Contents Introduction Why AWS Monitoring Costs Spiral Key Principles for Cost-Effective Monitoring Low-Cost Native AWS Tools for Security Monitoring Open-Source Solutions That Complement AWS Example Architectures & Pricing Automation Snippets for Cost-Efficient Alerts Common Pitfalls to Avoid Conclusion Introduction When people talk about security monitoring in AWS, the conversation quickly jumps to expensive SIEM tools or overengineered pipelines. But if you’re running lean, or just want better control over where your money is going, you can achieve excellent security visibility with surprisingly low cost. ...

May 19, 2025 · 5 min · 915 words · Javier Pulido

Securing Temporary Credentials in AWS: Best Practices for Safe Role Usage

Temporary credentials are one of the most powerful — and misunderstood — access mechanisms in AWS. They’re essential for enabling short-lived, tightly scoped access without the long-term baggage of static IAM user credentials. But with this flexibility comes a new surface for mistakes, misuse, and oversights. In this post, I’ll walk through the core use cases for temporary credentials, how they work, where they go wrong, and the best ways to keep them secure in your environment. ...

May 11, 2025 · 4 min · 763 words · Javier Pulido