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.
What is a Purple Team in Cybersecurity
A purple team is a cybersecurity group that combines the roles of both red teams (offensive security experts who simulate attacks) and blue teams (defensive security experts who protect and respond) to improve an organization's overall security. A person in a purple team role coordinates and facilitates collaboration between the red and blue teams, sharing insights from attack simulations to strengthen defenses, enhance detection and response capabilities, and continuously improve security measures.
This role involves working in real-time with both offensive and defensive strategies to proactively identify vulnerabilities, test defenses, and ensure the organization's security posture is robust and adaptive against threats. Essentially, the purple team bridges the gap between attack and defense to create a more effective and unified cybersecurity approach.
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:
- Metasploit Framework
- ZAP
- Burp Suite Professional
- CAIDO
- Sqlmap
- Nmap
- Nikto
- Wireshark
- Hydra
- PowerShell Empire
- Kali Linux
- Parrot Linux
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.
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.
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Ristagno G.Cristian
Purple Team Security
Cybersecurity Specialist | Web
Dev.
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