Expert Pentesting & API Testing Services in The United States

Professional pentesters providing comprehensive penetration testing and API security testing. Our expert pentesting services uncover vulnerabilities in your networks, applications, APIs, and cloud infrastructure. We combine automated scanning with manual testing to identify security gaps that automated tools miss.

Professional Pentesting Methodology

At Charlie Defense, our expert pentesters follow industry best practices and standards including OWASP, PTES (Penetration Testing Execution Standard), and NIST guidelines. Our professional pentesting services combine automated vulnerability scanning with extensive manual testing to identify security weaknesses that automated tools often miss. Our approach is systematic, thorough, and designed to provide actionable insights for improving your security posture.

Phase 1: Pre-Engagement and Scoping

Before beginning any penetration test, we conduct a comprehensive scoping exercise to understand your environment, identify in-scope systems, and establish clear testing boundaries. We work with your team to understand business objectives, compliance requirements, and specific security concerns. This phase includes defining testing windows, establishing communication protocols, and ensuring all necessary permissions and access are in place.

We develop a custom testing plan tailored to your environment, whether testing web applications, mobile applications, network infrastructure, cloud environments, or a combination. Our scoping process ensures we test the right systems, at the right time, with the right approach to minimize business disruption while maximizing security value.

Phase 2: Information Gathering and Reconnaissance

Our professional pentesting begins with comprehensive information gathering to understand your attack surface. For web applications and API testing, this includes identifying all endpoints, understanding application architecture, and mapping functionality. For network pentesting, we identify network topology, exposed services, and potential entry points. For cloud environments, we assess cloud architecture, IAM configurations, and exposed resources.

We use both passive and active reconnaissance techniques. Passive techniques include DNS enumeration, certificate transparency logs, search engine dorking, and social media intelligence gathering. Active techniques include port scanning, service enumeration, and application fingerprinting. This comprehensive approach helps our expert pentesters identify attack vectors that might be overlooked in a more limited assessment.

Phase 3: Vulnerability Identification

We employ a dual approach to vulnerability identification: automated scanning followed by extensive manual testing by our professional pentesters. Automated tools help us quickly identify common vulnerabilities and misconfigurations, but we don't stop there. Our expert pentesters manually verify all findings, eliminate false positives, and conduct deep-dive testing to identify complex vulnerabilities that automated tools cannot detect.

For web applications and API testing, we test for OWASP Top 10 vulnerabilities including injection flaws, broken authentication, sensitive data exposure, XML external entities, broken access control, security misconfigurations, cross-site scripting (XSS), insecure deserialization, using components with known vulnerabilities, and insufficient logging and monitoring. Our API testing services specifically focus on REST and GraphQL API security vulnerabilities.

For network pentesting, we test for misconfigurations, weak authentication mechanisms, unpatched systems, exposed services, and network segmentation issues. We assess wireless networks, VPN configurations, firewall rules, and network device security.

For cloud environments, we assess IAM policies, storage bucket configurations, network security groups, encryption settings, and cloud-native security controls. Our professional pentesting services test for common cloud misconfigurations that could lead to data exposure or unauthorized access.

Phase 4: Vulnerability Exploitation and Validation

Once vulnerabilities are identified, we carefully exploit them to validate their severity and demonstrate business impact. We use controlled exploitation techniques that minimize risk to your systems while providing proof-of-concept demonstrations. Our goal is to show not just that a vulnerability exists, but how an attacker would exploit it and what the business impact would be.

We document the full attack chain, from initial vulnerability identification through successful exploitation. This includes screenshots, proof-of-concept code, and detailed step-by-step instructions that your development and security teams can use to understand and remediate the issues.

Phase 5: Post-Exploitation and Impact Assessment

When exploitation is successful, we assess the potential impact by exploring what an attacker could achieve with the access gained. This might include accessing sensitive data, escalating privileges, moving laterally through the network, or compromising additional systems. We document the full scope of potential damage to help prioritize remediation efforts.

We test your security monitoring and incident response capabilities by evaluating whether our activities are detected, logged, and responded to appropriately. This helps identify gaps in security visibility and response procedures.

Phase 6: Reporting and Remediation Guidance

Following the penetration test, we provide comprehensive reporting that includes detailed findings, risk assessments, and prioritized remediation recommendations. Our reports are designed to be actionable, with specific guidance on how to fix each vulnerability and prevent similar issues in the future.

Testing Types and Specializations

Web Application Penetration Testing

We conduct comprehensive security assessments of web applications, testing for vulnerabilities in authentication mechanisms, session management, input validation, business logic flaws, and API security. We test both the application layer and underlying infrastructure, including web servers, application servers, and databases.

Mobile Application Security Testing

Our mobile application testing covers both iOS and Android platforms, assessing application security, data storage, network communications, authentication mechanisms, and platform-specific vulnerabilities. We test for insecure data storage, insufficient transport layer protection, unintended data leakage, poor authentication and authorization, broken cryptography, client-side injection, security decisions via untrusted inputs, improper session handling, and lack of binary protections.

API Security Testing

Our expert pentesters conduct specialized API testing assessments of REST and GraphQL APIs, testing for authentication and authorization flaws, input validation issues, rate limiting weaknesses, and business logic vulnerabilities. Our professional API testing services assess API endpoints, authentication mechanisms, data validation, and API-specific security controls. We provide comprehensive API security testing that goes beyond automated scans.

Network Penetration Testing

Our professional network pentesting services assess internal and external network security, testing for misconfigurations, weak authentication, unpatched systems, and network segmentation issues. Our expert pentesters test firewalls, routers, switches, wireless networks, VPNs, and other network infrastructure components. We provide thorough network pentesting that identifies security gaps in your infrastructure.

Cloud Security Assessments

We conduct specialized assessments of AWS, Azure, and GCP environments, testing for cloud misconfigurations, IAM policy weaknesses, storage bucket security, network security groups, and cloud-native security controls. We assess both infrastructure-as-code (IaC) configurations and deployed resources.

Professional Pentesting Tools and Technologies

Our expert pentesters utilize a comprehensive toolkit of commercial, open-source, and custom-developed tools to ensure thorough security assessments. Our professional pentesting services leverage industry-leading tools for API testing, network pentesting, and vulnerability identification.

Burp Suite Professional

Industry-standard web application and API testing tool for intercepting, analyzing, and manipulating HTTP/HTTPS traffic. Our pentesters use Burp Suite for web application pentesting, API security testing, and vulnerability identification. Essential for professional API testing services.

Nmap

Network discovery and security auditing tool for port scanning, service enumeration, and network mapping. Our expert pentesters use Nmap extensively for network pentesting and infrastructure assessments. Critical for comprehensive network penetration testing.

Metasploit Framework

Comprehensive penetration testing framework for exploit development, payload generation, and post-exploitation activities. Our professional pentesters use Metasploit for vulnerability exploitation and validation during pentesting engagements.

SQLMap

Automated SQL injection and database takeover tool for identifying and exploiting SQL injection vulnerabilities. We use SQLMap for database security testing and SQL injection validation.

MobSF (Mobile Security Framework)

Automated mobile application security testing framework for static and dynamic analysis of iOS and Android applications. We use MobSF for mobile application security assessments.

Cloud Security Tools

Pacu (AWS), MicroBurst (Azure), Scout Suite (multi-cloud), and custom scripts for cloud security assessments. We use these tools to identify cloud misconfigurations and security weaknesses.

Custom Exploitation Scripts

We develop custom scripts and tools for testing specific vulnerabilities, business logic flaws, and application-specific security issues that standard tools cannot identify.

Deliverables

Comprehensive Penetration Test Report

  • Executive Summary: High-level overview of findings, risk assessment, and key recommendations for leadership and stakeholders. Focuses on business impact and strategic security improvements.
  • Testing Methodology: Detailed description of testing approach, tools used, and testing scope. Helps stakeholders understand the depth and breadth of the assessment.
  • Vulnerability Findings: Detailed documentation of each vulnerability identified, including severity ratings, CVSS scores, proof-of-concept demonstrations, and business impact assessment. Each finding includes screenshots, code samples, and step-by-step reproduction instructions.
  • Risk Assessment: Prioritized risk ratings for each finding based on exploitability, business impact, and potential damage. Helps prioritize remediation efforts based on actual risk to your business.
  • Security Best Practices: Recommendations for improving overall security posture, including secure coding practices, security architecture improvements, and security control enhancements.
  • Compliance Mapping: Mapping of findings to relevant compliance frameworks (PCI-DSS, HIPAA, GDPR, etc.) to help meet regulatory requirements.

Additional Deliverables

  • Proof-of-Concept Exploits: Safe, controlled exploit code demonstrating vulnerability exploitation for your development and security teams.
  • Vulnerability Database Export: Machine-readable export of findings for integration with vulnerability management systems and ticketing systems.
  • Remediation Tracking Spreadsheet: Tracking document for monitoring remediation progress and verifying fixes.
  • Executive Presentation: Slide deck summarizing findings and recommendations for executive leadership and board presentations.
  • Technical Deep-Dive Sessions: Optional follow-up sessions with your development and security teams to discuss findings in detail and answer questions.

Why Choose Our Professional Pentesting Services

Our professional pentesting services are conducted by expert pentesters who have discovered critical vulnerabilities in Fortune 500 companies. We combine automated scanning with extensive manual testing by our professional pentesters to identify vulnerabilities that automated tools miss, including business logic flaws, complex authentication bypasses, and application-specific security issues. Our API testing services are particularly thorough.

We understand that pentesting is only valuable if the results are actionable. Our reports are designed to be clear, comprehensive, and immediately useful to your development and security teams. We don't just tell you what's wrong. We explain how to fix it, why it matters, and how to prevent similar issues in the future. Our expert pentesters provide detailed remediation guidance.

Our professional pentesting approach is thorough but respectful of your business operations. We work closely with your team to minimize disruption while maximizing security value. We provide real-time updates during pentesting and are available for questions and clarifications throughout the engagement.

Ready to Assess Your Security?

Schedule a consultation to discuss your penetration testing needs.