Offensive Security & Advisory Practice
Get a Clearly Scoped Security Assessment
Every engagement is custom-scoped to your architecture, user privilege model, and business objectives—executed manually by Eren Gözaydın without junior handoffs or generic scanner dumps.
SERVICE 01•Application Security
Web Application Penetration Testing
In-depth manual security assessments of complex web platforms, SaaS applications, and enterprise portals—uncovering authentication flaws, multi-tenant isolation bypasses, and server-side vulnerabilities that automated scanners cannot detect.
Who This Assessment Is For
- •B2B SaaS providers preparing for enterprise customer security reviews or compliance audits
- •Fintech, e-commerce, and high-transaction platforms protecting sensitive customer workflows
- •Engineering teams launching major architectural updates, SSO integrations, or new role hierarchies
Typical Security Problems Uncovered
- ›Complex multi-role authorization matrices where lower-privileged users can access administrative or cross-tenant functions
- ›Multi-step business logic workflows (checkout, account recovery, privilege delegation) vulnerable to state manipulation
- ›Legacy and modern SQL/NoSQL injection, Server-Side Request Forgery (SSRF), and template injection exposures
Technical Assessment Coverage
- Authentication, SSO (OAuth 2.0 / OIDC / SAML) & MFA workflow security
- Horizontal & vertical authorization boundaries (IDOR / BOLA / BFLA) and multi-tenant isolation
- Business logic abuse, race conditions & workflow state bypass
- Injection vulnerabilities (SQLi, NoSQLi, XXE, SSTI, OS Command Injection)
- Session management, token lifecycle, CSRF & client-side security (XSS, DOM clobbering, CORS)
- Server-side vulnerabilities (SSRF, insecure deserialization, file upload/path traversal)
- Actionable, framework-aware remediation guidance for engineering teams
Representative Scope Examples
- •Multi-tenant B2B SaaS web application with 4 distinct user privilege tiers and admin console
- •Customer-facing financial portal and internal operations back-office web application
- •Pre-release security assessment of a newly architected web platform prior to general availability
Assessment Methodology & Standards
- OWASP Web Security Testing Guide (WSTG v4.2)
- OWASP Application Security Verification Standard (ASVS)
- OWASP Top 10 Web Application Security Risks
- PTES (Penetration Testing Execution Standard)
Client Deliverables
- Executive Risk Summary translating technical exposures into business impact
- Detailed Technical Findings Report with CVSS v3.1 vectors, HTTP request/response PoCs, and step-by-step reproduction
- Prioritized Remediation Roadmap with stack-specific defensive patterns
- Post-remediation verification retesting and updated status documentation
SERVICE 02•Application & Integration Security
API Security Assessment
Rigorous manual testing of RESTful, GraphQL, and microservice APIs focusing on object-level authorization, token validation, mass assignment, and business logic abuse across web and mobile backends.
Who This Assessment Is For
- •Organizations exposing B2B partner APIs, webhook ecosystems, or public developer endpoints
- •Engineering teams operating decoupled single-page applications (SPAs) or mobile backend APIs
- •Platforms integrating third-party financial, identity, or enterprise data pipelines
Typical Security Problems Uncovered
- ›Broken Object Level Authorization (BOLA) and Broken Function Level Authorization (BFLA) across API endpoints
- ›Improper JWT signing validation, token scope confusion, or insecure refresh token lifecycles
- ›GraphQL introspection exposure, nested query denial-of-service, and batching rate-limit bypasses
Technical Assessment Coverage
- REST API & GraphQL endpoint security auditing
- Broken Object Level Authorization (BOLA / IDOR) & Broken Object Property Level Authorization (BOPLA / Mass Assignment)
- API authentication mechanisms (JWT, OAuth 2.0 bearer tokens, API keys, mTLS, HMAC signatures)
- Rate limiting, resource exhaustion, batching abuse & automated scraping defenses
- Excessive data exposure & undocumented shadow/legacy API version discovery
- Server-Side Request Forgery (SSRF) via webhook callbacks and outbound integrations
- Business logic abuse across multi-endpoint API transactions
Representative Scope Examples
- •Core REST API gateway (~40–80 endpoints) backing a web and mobile financial application
- •Federated GraphQL API serving multi-tenant organizational data and role-based mutations
- •Partner-facing B2B integration API and webhook delivery subsystem
Assessment Methodology & Standards
- OWASP API Security Top 10 (2023)
- OWASP Web Security Testing Guide (WSTG)
- RFC 8725 (JSON Web Token Best Current Practices)
Client Deliverables
- Endpoint-by-endpoint authorization and vulnerability coverage matrix
- Reproducible cURL / HTTP / Postman proof-of-concept payloads
- Token lifecycle, schema validation, and rate-limiting architecture recommendations
- Remediation verification retest report
SERVICE 03•Mobile Security
Mobile Application Penetration Testing
Comprehensive static, dynamic, and runtime instrumentation assessments of Android and iOS applications—evaluating client-side binary protections, local data storage, transport security, and backend API interactions.
Who This Assessment Is For
- •Fintech, banking, healthcare, and consumer platforms delivering critical services via iOS and Android apps
- •Organizations requiring OWASP MASVS-aligned validation before App Store / Google Play releases
- •Teams concerned about reverse engineering, certificate pinning bypass, or credential extraction from mobile devices
Typical Security Problems Uncovered
- ›Sensitive tokens, cryptographic keys, or PII persisted insecurely in SharedPreferences, SQLite, Plist, or Keychain/Keystore
- ›Bypassable SSL/TLS certificate pinning or root/jailbreak detection controls using runtime instrumentation
- ›Exported Android activities/intents, insecure iOS deep links (Universal Links / Custom URL Schemes), and vulnerable mobile backend APIs
Technical Assessment Coverage
- Android (APK/AAB) & iOS (IPA) static binary analysis and reverse engineering
- Dynamic runtime analysis and method hooking (Frida / Objection runtime instrumentation)
- Local data storage, cache, memory dump, and Keystore/Keychain security evaluation
- Network communication, TLS configuration, and certificate pinning bypass resistance
- Mobile authentication, biometric implementation, and session token handling
- Platform-specific attack surfaces (IPC, exported components, WebViews, deep links)
- End-to-end security testing of the underlying mobile backend APIs
Representative Scope Examples
- •Dual-platform (Android + iOS) mobile banking or payment application and its supporting API endpoints
- •Enterprise workforce mobile application handling offline authentication and sensitive local documents
- •Consumer mobile application undergoing OWASP MASVS Level 1 / Level 2 security verification
Assessment Methodology & Standards
- OWASP Mobile Application Security Verification Standard (MASVS)
- OWASP Mobile Application Security Testing Guide (MASTG)
- OWASP Mobile Top 10
Client Deliverables
- Platform-specific technical report covering Android, iOS, and shared backend API findings
- Annotated decompiled code snippets, runtime hooking scripts, and reproduction steps
- OWASP MASVS control mapping and hardening recommendations
- Verification retesting of patched mobile builds
SERVICE 04•Infrastructure Security
Network & Infrastructure Penetration Testing
External perimeter and internal network penetration testing designed to identify exposed services, segmentation weaknesses, privilege escalation vectors, and multi-hop lateral movement paths across corporate infrastructure.
Who This Assessment Is For
- •Enterprises validating perimeter defenses and internal network segmentation across offices, data centers, or hybrid cloud VPCs
- •Organizations requiring rigorous annual or pre-audit infrastructure penetration testing (ISO 27001, SOC 2, PCI DSS, TSE aligned)
- •IT and security teams seeking to verify whether a single compromised host can lead to full environment compromise
Typical Security Problems Uncovered
- ›Forgotten perimeter services, legacy VPN/remote access endpoints, or misconfigured network appliances
- ›Flat internal network segments allowing unrestricted lateral movement between user VLANs and server subnets
- ›Unpatched service vulnerabilities, weak credential hygiene, and host-level Windows/Linux privilege escalation flaws
Technical Assessment Coverage
- External perimeter reconnaissance, port/service interrogation, and vulnerability validation
- Internal network penetration testing (assumed-breach or segmented foothold scenarios)
- Network segmentation and firewall boundary verification across VLANs and DMZs
- Service misconfigurations, default credentials, and protocol-level attacks (SMB, SNMP, LDAP, Kerberos, NFS)
- Linux and Windows local privilege escalation and credential harvesting
- Multi-subnet pivoting and lateral movement path demonstration
- Comprehensive remediation guidance and post-patch verification retesting
Representative Scope Examples
- •External perimeter assessment of public IP ranges and exposed corporate services
- •Assumed-breach internal network penetration test across segmented corporate subnets
- •Network segmentation verification between production cardholder/sensitive zones and corporate networks
Assessment Methodology & Standards
- PTES (Penetration Testing Execution Standard)
- NIST SP 800-115 (Technical Guide to Information Security Testing and Assessment)
- OSSTMM (Open Source Security Testing Methodology Manual)
- TSE (Turkish Standards Institution) Penetration Testing Criteria Alignment
Client Deliverables
- Executive Infrastructure Risk Summary & Attack Path Narrative
- Host-by-host and service-level technical vulnerability dossier
- Segmentation validation matrix and network hardening blueprint
- Post-remediation verification retesting
Relevant Credentials
LPT MasterCPENTeCPPTv2CEH MasterCEH Practical
Request Scoping for Network & InfrastructureSERVICE 05•Identity & Adversary Simulation
Active Directory & Red Team Assessments
Targeted identity and domain security assessments focused on uncovering Active Directory attack paths, Kerberos delegation flaws, ACL/GPO misconfigurations, and privilege escalation chains—paired with practical detection and hardening guidance.
Who This Assessment Is For
- •Enterprises relying on Windows Active Directory or hybrid identity infrastructures for corporate authentication
- •Security operations (SOC / Blue Team) leaders looking to validate attack-path resistance and defensive detection visibility
- •Organizations seeking to prevent domain-wide ransomware or administrative takeover scenarios
Typical Security Problems Uncovered
- ›Hidden Active Directory ACL/ACE permissions, over-privileged service accounts, and Kerberoastable/AS-REP Roastable identities
- ›Unconstrained, constrained, or resource-based constrained Kerberos delegation misconfigurations
- ›Active Directory Certificate Services (ADCS) template flaws, GPO abuse paths, and cross-forest trust weaknesses
Engagements are carefully scoped to business needs: Active Directory assessments focus on thorough identity attack-path discovery and validation, while full adversary simulations are tailored strictly to agreed Rules of Engagement rather than unrestricted operational disruption.
Technical Assessment Coverage
- Active Directory attack-path mapping and privilege escalation chain analysis
- Kerberos authentication security (Kerberoasting, AS-REP Roasting, delegation abuse, ticket manipulation)
- Access Control List (ACL), Group Policy Object (GPO), and administrative tiering evaluation
- Active Directory Certificate Services (ADCS) & domain trust relationship security
- Credential exposure analysis (LSASS protections, LAPS deployment, NTLM relay vectors, Tier-0 isolation)
- Objective-driven attack path validation within agreed Rules of Engagement
- Defensive detection telemetry and SIEM/EDR visibility recommendations
Representative Scope Examples
- •Assumed-breach Active Directory security assessment starting from a standard domain-joined workstation user
- •Multi-domain forest trust and Tier-0 administrative boundary security review
- •Objective-focused red team exercise evaluating path-to-Domain-Admin and defensive alerting fidelity
Assessment Methodology & Standards
- MITRE ATT&CK Enterprise Matrix (Identity, Credential Access, Lateral Movement, Privilege Escalation)
- PTES & Objective-Driven Assumed-Breach Methodology
Client Deliverables
- Step-by-step Attack Path Walkthrough illustrating initial foothold to domain privilege escalation
- Active Directory Configuration & Identity Risk Findings Report
- Defensive Detection & Blue Team Telemetry Recommendations mapped to MITRE ATT&CK techniques
- Tiered remediation roadmap (Quick Wins vs. Structural AD Tiering)
SERVICE 06•Strategic & Technical Advisory
Security Architecture & Advisory
Pragmatic technical risk assessments, security posture reviews, and remediation governance that bridge the gap between deep offensive findings and executive security decision-making.
Who This Assessment Is For
- •CTOs, CISOs, and VPs of Engineering needing independent, senior-level security architecture evaluation
- •Growing technology companies preparing for enterprise vendor security due diligence or regulatory readiness
- •Leadership teams seeking to prioritize complex vulnerability backlogs by actual exploitability and business risk
Typical Security Problems Uncovered
- ›Disconnect between raw vulnerability reports and engineering capacity—leading to remediation paralysis
- ›Architectural security gaps introduced during rapid product scaling, M&A integration, or cloud migration
- ›Need for clear, credible executive reporting that translates technical debt into board-level risk priorities
Technical Assessment Coverage
- Application and infrastructure security posture reviews
- Architectural threat modeling for new platforms, APIs, and multi-tenant systems
- Technical risk assessment and exploitability-driven backlog prioritization
- Defense-in-depth control evaluation (authentication architecture, network segmentation, secrets management)
- Executive and board-level security reporting and audit readiness advisory
- Remediation governance and engineering team security workshops
Representative Scope Examples
- •Pre-production architecture threat modeling and security design review for a new SaaS platform
- •Quarterly independent technical security advisory and penetration test remediation governance
- •Executive security posture assessment ahead of enterprise client onboarding or compliance certification
Assessment Methodology & Standards
- EC-Council C|CISO Governance, Risk & Security Program Domains
- OWASP SAMM (Software Assurance Maturity Model) & ASVS Architecture Principles
- ISO/IEC 27001 & NIST Cybersecurity Framework Alignment
Client Deliverables
- Security Architecture & Posture Assessment Report
- Threat Model Diagrams & Trust Boundary Risk Register
- Prioritized 30-60-90 Day Technical Remediation Roadmap
- Executive Briefing Deck for Leadership & Stakeholders
Relevant Credentials
Associate C|CISOLPT MasterCPENTCMSE
Request Scoping for Security Architecture & AdvisorySERVICE 07•Web3 & Distributed Infrastructure
Blockchain Security Advisory
Specialized security advisory for blockchain-enabled platforms and Web3 infrastructure—focusing on threat modeling, node/RPC architecture, custodial/non-custodial key management, and off-chain web/API attack surfaces.
Who This Assessment Is For
- •Web3 platforms, digital asset exchanges, and fintechs integrating blockchain infrastructure
- •Enterprises building permissioned or hybrid distributed ledger systems
- •Engineering teams securing the critical bridge between off-chain web/mobile applications and on-chain operations
Typical Security Problems Uncovered
- ›Compromise of Web3 platforms through traditional off-chain vectors: vulnerable web frontends, APIs, admin portals, or RPC nodes
- ›Weaknesses in cryptographic key lifecycle management, signing workflows, or identity/access boundaries
- ›Architectural blind spots across consensus assumptions, oracle dependencies, and node infrastructure
Scope Transparency: Blockchain Security Advisory focuses on blockchain infrastructure security, architectural threat modeling, key/identity management, and off-chain web/API/mobile penetration testing. It does not claim standalone formal verification or line-by-line smart contract source code auditing unless specifically co-scoped.
Technical Assessment Coverage
- Blockchain infrastructure & node/RPC endpoint security architecture review
- End-to-end threat modeling across on-chain and off-chain system boundaries
- Cryptographic key management, wallet integration, and transaction-signing workflow security
- Penetration testing of Web3 companion web applications, mobile wallets, and backend APIs
- Identity, privileged access, and administrative governance risk assessment
Representative Scope Examples
- •Security architecture and threat model review for a digital asset platform's signing and API infrastructure
- •Full-stack penetration test of a Web3 platform's web portal, mobile app, and backend RPC gateway
- •Key management and operational security advisory for a blockchain technology venture
Assessment Methodology & Standards
- Blockchain Council CBSP Security Domains
- OWASP Web, API & Mobile Security Standards (for off-chain interfaces)
- NIST Cryptographic Key Management Guidelines
Client Deliverables
- Blockchain Infrastructure Threat Model & Risk Assessment Report
- Key Management & Transaction Signing Security Review
- Off-Chain Web/API/Mobile Penetration Testing Findings (where scoped)
- Prioritized Architectural Hardening Recommendations
How Engagement Scoping & Quotes Work
Because offensive security depth depends on architectural complexity—such as the number of user privilege tiers, API endpoints, mobile binaries, or Active Directory domains—engagements are never priced via arbitrary fixed-price tiers. Submit your high-level architecture parameters on the project inquiry page to receive a tailored scoping proposal under mutual NDA.
Engagement Scoping
Discuss Your Security Testing Requirements
Tell me what you need assessed—whether a multi-tenant web application, REST/GraphQL API, Android/iOS mobile build, or internal Active Directory environment. You will deal directly with the senior specialist executing the assessment.
• Direct Senior Execution• Mutual NDA Available• Reproducible PoC Reporting• Post-Remediation Retesting