Cristian Ristagno

Purple Team Security

Ristagno G.Cristian

Senior Analyst Dev. IT Security

Security expert with a developer's mindset and a pilot's precision

About Me as Purple Team Member

I integrate offensive and defensive expertise to enhance detection and response capabilities. I analyze adversarial techniques, design realistic attack scenarios, and translate findings into concrete mitigation actions

I lead initiatives aimed at improving infrastructure resilience, actively contributing to the continuous evolution of the organization’s security posture.

Services

Web Attack Surface Mapping

In-depth enumeration and profiling of exposed web assets, identifying weak entry points and misconfigurations across APIs, front-end, and backend services.

Web Attack Surface Mapping

In-depth enumeration and profiling of exposed web assets, identifying weak entry points and misconfigurations across APIs, front-end, and backend services.

Exploit Chain Simulation

End-to-end simulation of multi-step web exploitation paths — from reconnaissance to data exfiltration — to validate detection coverage and response workflows.

Application-layer Threat Injection

Controlled injection of web-based attack vectors (e.g., XSS, CSRF, IDOR, logic flaws) to test the resilience of detection mechanisms and response escalation.

Session Hijacking Assessment

Evaluation of session management mechanisms through simulated attacks to identify token leakage, fixation, and improper invalidation vulnerabilities.

Custom Payload Development

Design of tailored attack payloads for bypassing web filters and WAFs, enabling realistic threat emulation in controlled environments.

Logic Flaw Exploitation Testing

Identification and exploitation of non-technical vulnerabilities in application logic, such as bypassing business rules or manipulating workflows.

My Toolkit

I leverage industry-standard tools for comprehensive security assessments:

Methodology

Reconnaissance

Gathered basic infrastructure details—domain names, IPs, and exposed services—to identify potential entry points for later testing phases.

Scanning

Identified live hosts, open ports, and running services to map the attack surface and detect potential vulnerabilities.

Assessment

Evaluate your current security posture, identifying strengths and weaknesses across people, processes, and technology.

Simulation

Execute realistic attack scenarios tailored to your environment and highest-risk threats.

Exploitation

Leveraged identified vulnerabilities to gain unauthorized access, escalate privileges, or extract sensitive data.

Closed-loop Improvement

Implement feedback cycles to continuously enhance both offensive and defensive capabilities.

Beyond Cybersecurity: Aviation Perspective

PPL-Inspired Decision Models

Structured planning, awareness, and precision—core in aviation—enhance cybersecurity response and reduce cognitive load under pressure.

Security Risk Alignment

Pre-flight checks mirror security assessments. In-flight monitoring reflects real-time threat detection—same logic, different domain.

The pilot mindset: "Always stay one step ahead, whether in the skies or in cyberspace."

Technical Expertise Matrix

.NET Ecosystem

  • C# / ASP.NET Core/8+ / APIs
  • Entity Framework Core / LINQ
  • MediatR / CQRS / DDD
  • Ocelot API Gateway

Data & Reporting

  • SQL Server / PostgreSQL / MongoDB
  • Stored Procedures / CTE / Triggers
  • Power BI / Data Modeling

Dev Tools & Workflow

  • Visual Studio / VS Code
  • Git / GitHub / Azure DevOps
  • CI/CD Pipelines / GitHub Actions

Advanced Web Hacking

  • Token exploitation prevention
  • SSRF & desync hardening
  • Secure SDLC integration

IoT & Telemetry

  • NATS / AMQP / MQTT v5 streaming
  • Telemetry via gRPC
  • Telemetry Data Analysis

Cloud & Architecture

  • Azure App Services / AWS Lambda
  • Infrastructure as Code: Terraform / Bicep
  • Clean Architecture / SOLID / DevSecOps

Holistic approach combining development expertise, security hardening, and system architecture for comprehensive protection.

Contact Me

Ready to strengthen your security posture?

Get in Touch!
Cristian Ristagno
Purple Team Security
Cybersecurity Specialist | Web Dev.