SiriusOne:

Penetration Testing for Enterprise Systems

Manual-first penetration testing — simulating real attacker behavior across web, API, mobile, and cloud layers.

Client & Project Overview

A global technology company asked SiriusOne to go beyond automated scanners and validate how its systems behave under pressure. The assessment focused on attacker-like tactics to uncover chained vulnerabilities, misconfigurations, and CI/CD exposure risks. The outcome was not only a list of issues but a clear plan to reduce risk and strengthen engineering practices across teams.

Business Problem

Traditional vulnerability scans flag surface defects but miss business-logic flaws and multi-step attack paths. Previous audits produced static reports that lacked impact and prioritization, leaving development unsure where to act first. The client needed a manual engagement that proves exploitability, ranks risk by business impact, and guides remediation to durable results.

"We don’t just test systems — we challenge assumptions. Our goal was to turn scanning into validation and reports into decisions."

Eugene Fateev

Eugene Fateev

Lead Cybersecurity Engineer, SiriusOne

Tech Stack

Cloud: AWS (IAM, WAF)

Apps: Web, APIs, iOS, Android

CI/CD: GitLab

Security: Burp Suite, OWASP ZAP, Nmap, Metasploit, Intruder, Gitleaks, Docker Scout, Dependency-Track

Frameworks: OWASP Top 10, NIST 800-115, OSSTMM, ASVS

#Cybersecurity

#Penetration Testing

#DevSecOps

Penetration Testing for Enterprise Systems Case Image

Project Timeline

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We followed a clear roadmap — from reconnaissance to delivery — ensuring transparency, repeatability, and measurable outcomes.

Duration

3 weeks

Effort

240 hours

Discovery & Research

Days 1–3

External footprinting, asset inventory, tech-stack mapping, scoping and rules of engagement confirmed.

Design & Prototyping

Days 4–8

Threat modeling, test design, abuse-case mapping, data-flow validation, safe-test constraints and success criteria.

Development

Days 9–15

Manual exploitation of prioritized vectors, auth and access control validation, API chaining, mobile app review, and WAF probe tests.

Testing & Security Audit

Days 16–18

Risk validation, impact confirmation, SBOM/dependency checks, CI/CD secrets audit, cloud/IAM spot checks, and evidence collection.

Deployment & Training

Days 19–21

Executive report, risk matrix and remediation plan; stakeholder workshop, developer hand-off, and retest window scheduling.

Team involved

Cybersecurity Architect team member 1

Cybersecurity Architect

OWASP/NIST alignment, threat modeling, risk policy.

Red Team Lead team member 1

Red Team Lead

Manual exploitation, lateral movement, bypass tactics.

DevSecOps Engineer team member 1

DevSecOps Engineer

CI/CD, secrets management, pipeline hardening.

Cloud Architect team member 1

Cloud Architect

AWS IAM/WAF review, perimeter and posture checks.

Project Manager team member 1

Project Manager

Governance, cadence, delivery and stakeholder alignment.

Solution Overview

SiriusOne’s penetration testing engagement combined the power of automation with manual expertise — going beyond traditional vulnerability scanning. Each vulnerability was mapped to business impact and exploitation path, transforming the report from static documentation into a real security roadmap.

Web & API Testing

Injection, authz/authn, access control and data-exposure validation with chained-attack scenarios.

Mobile App Testing

Transport security, storage risks, code/obfuscation review, API linkage and device-level misconfig checks.

Cloud & IAM Review

Privilege paths, public exposure, WAF rules, logging, and least-privilege hygiene.

CI/CD & Secrets Audit

Token leakage, runner permissions, artifact trust, dependency risk and SBOM verification.

WAF & Edge Validation

OWASP Top 10 probes, false-negative checks and rule-tuning guidance with reproducible evidence.

Results

60% Reduction in Exposure Window

Faster discovery-to-fix through prioritized remediation and playbooks.

Critical Findings Uncovered

Business-logic chains and 5 critical issues missed by prior automated scans were validated and fixed.

Hardened CI/CD & Dependencies

Secrets protection, runner isolation, SBOM and dependency governance improved.

Compliance & Confidence

ASVS/OWASP coverage demonstrated; clearer audit trail for internal and external stakeholders.

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