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Attack Simulation & Offensive Security

Find the gaps
before the
attackers do.

AI-augmented penetration testing that goes deeper, faster and wider than conventional assessments. CHECK-accredited, CREST-certified, and built around your actual threat landscape — not a generic checklist.

AI-Augmented Web Applications Infrastructure Red Teaming Social Engineering
CHECK
Team Leader & Member certified — approved for HMG and public sector engagements
7
Industry certifications — CREST CRT, CCT APP, CCT INF, OSCP, GPEN, GWAPT and more
100%
Written reports with executive summary, risk-rated findings and technical remediation guidance
All engagements conducted under signed Rules of Engagement. Full written reports with executive summary and technical remediation guidance delivered to every client.
Our Capabilities

Penetration testing across every attack surface.

Modern attack surfaces span web applications, cloud infrastructure, internal networks, human behaviour and increasingly — AI systems. Our offensive security practice covers all of them, using AI-driven tooling to augment human expertise and deliver findings that are faster, deeper and more actionable than conventional assessments.

We don't run automated scans and call them penetration tests. Every engagement is led by experienced, certified professionals who understand how attackers actually operate — and how to find what automated tools miss.

AI-Augmented Penetration Testing

Industry-leading offensive testing enhanced by AI-driven attack pattern recognition and automated vulnerability correlation. Faster, deeper and more comprehensive coverage across modern attack surfaces — including the attack vectors that purely manual testing routinely misses under time pressure.

LLM / GenAI Security Testing API & Microservices Testing AI Model Red-Teaming Prompt Injection Assessment Automated Exploit Correlation
Application Security

Web Application Pentesting

OWASP Top 10, business logic, auth bypass, injection flaws. Covering SPAs, REST/GraphQL APIs, and complex enterprise web platforms.

  • OWASP Top 10 and beyond — business logic, IDOR, SSRF
  • Authentication & authorisation bypass testing
  • REST, GraphQL and gRPC API security assessment
  • Single-page application (SPA) and JavaScript analysis
  • OAuth 2.0 and SAML/SSO misconfiguration testing
  • Session management and token security review
  • Source code review (on request)
Network & Cloud

Infrastructure Pentesting

Internal/external network, Active Directory, cloud environments (AWS, Azure, GCP). Credential harvesting, privilege escalation, lateral movement.

  • External perimeter assessment and attack surface mapping
  • Internal network segmentation and lateral movement
  • Active Directory and Azure AD attack paths
  • AWS, Azure and GCP misconfigurations and IAM abuse
  • Credential harvesting and password spray simulation
  • Privilege escalation chains on Windows and Linux
  • VPN, firewall and network device hardening review
Adversary Simulation

Red Team Exercises

Full-scope adversary simulation against people, processes and technology. TIBER-EU, CBEST, and custom threat-intelligence-led engagements.

  • Threat-intelligence-led scenario design
  • TIBER-EU and CBEST framework delivery
  • Physical intrusion and tailgating assessment
  • Command-and-control infrastructure simulation
  • Assumed-breach and purple team variants
  • Detection and response capability evaluation
  • Full debrief and lessons-learned workshop
Human Layer

Social Engineering & Phishing

Spear phishing campaigns, vishing, physical intrusion, pretexting. Testing your human firewall under realistic attack conditions.

  • Targeted spear phishing campaigns with payload delivery
  • Vishing (voice phishing) and pretexting scenarios
  • Physical security and access control bypass
  • USB drop and removable media testing
  • Executive and privileged user targeting
  • Security awareness measurement and benchmarking
  • Staff awareness training follow-up available
Certifications & Accreditations

Certified to test the most sensitive environments.

Our consultants hold the most rigorous offensive security certifications in the industry — including CHECK accreditation for government and public sector engagements.

CHECK Team
Leader
NCSC-approved for HMG systems
CHECK Team
Member
NCSC-approved certification
CREST
CRT
Registered Tester
CREST CCT
APP
Certified — Applications
CREST CCT
INF
Certified — Infrastructure
OSCP
Offensive Security Certified Professional
GPEN &
GWAPT
GIAC Pen Tester & Web App

All tests conducted under signed Rules of Engagement · Full written reports with executive summary and technical remediation guidance

Our Approach

A methodology built around your real risk — not a template.

Every penetration test we conduct follows a structured methodology designed to maximise findings quality and minimise false positives. We spend more time on manual exploitation and business-logic testing than any automated tooling can deliver — because the most critical vulnerabilities are rarely found by scanners.

Our reports are written for two audiences: technical teams who need to fix findings, and boards who need to understand business risk. Every finding is risk-rated, evidenced and accompanied by specific remediation guidance.

  1. 01

    Scoping & Rules of Engagement

    Define scope, objectives, out-of-bounds systems, testing windows and emergency escalation contacts. All signed before testing begins.

  2. 02

    Reconnaissance & Attack Surface Mapping

    OSINT, passive and active enumeration to build a complete picture of your exposed attack surface before exploitation begins.

  3. 03

    Exploitation & Post-Exploitation

    Manual-led exploitation of identified vulnerabilities, followed by privilege escalation, lateral movement and objective completion within agreed scope.

  4. 04

    Reporting & Remediation Guidance

    Full written report with executive summary, risk-rated findings (CVSS), proof-of-concept evidence, and specific technical remediation steps.

  5. 05

    Debrief & Retest

    Live debrief with technical and senior stakeholders. Optional retest of critical findings at no additional charge within 90 days.

What we test

External Perimeter

Internet-facing assets, subdomains, APIs, authentication portals, cloud-hosted services

Internal Network

On-premise infrastructure, Active Directory, internal applications, network devices, segmentation controls

Cloud Environments

AWS, Azure, GCP — IAM policies, storage misconfigurations, serverless, container security

Web & Mobile Applications

Customer-facing and internal applications, APIs, mobile backends, authentication systems

AI & LLM Systems

LLM-integrated applications, prompt injection, model exfiltration, AI pipeline security

People & Processes

Phishing resilience, vishing, physical security controls, security awareness baselines

Why Musketeers

Offensive security without the compromise.

CHECK & CREST Certified

Accredited to test government, CNI and regulated environments where uncertified providers cannot operate.

AI-Enhanced Coverage

Attack pattern recognition and automated correlation finds vulnerabilities that time-constrained manual testing misses.

Board-Ready Reports

Every report is written for two audiences — technical teams who fix issues, and boards who need to understand business risk.

SC & DV Cleared

Security-cleared consultants available for government, defence and CNI engagements requiring personnel vetting.

FAQ

Common questions

Everything you need to know about commissioning a penetration test.

AI-augmented penetration testing combines traditional manual testing expertise with AI-driven attack pattern recognition and automated vulnerability correlation. This delivers faster, deeper and more comprehensive coverage across modern attack surfaces — including LLM security, AI model red-teaming, and API security — while retaining the human judgement essential for complex exploitation chains and business logic testing.
CHECK is a UK government-backed scheme administered by NCSC that certifies penetration testing companies and individuals to test government and public sector systems. CHECK Team Leaders and Members must pass rigorous assessments. Musketeers Security holds CHECK Team Leader and Member certifications, enabling us to conduct HMG-approved penetration tests for government, CNI and public sector clients where standard commercial certifications are not accepted.
A penetration test is a structured assessment of a defined scope for vulnerabilities — typically time-bounded and breadth-focused. A red team exercise is a full-scope adversary simulation that tests your organisation's people, processes and technology against specific objectives — such as accessing sensitive data or disrupting operations — using the same tactics as sophisticated threat actors. Red teaming evaluates detection and response capability, not just vulnerability presence. TIBER-EU and CBEST are regulated variants for financial institutions.
Our penetration testers hold industry-leading certifications including CHECK Team Leader, CHECK Team Member, CREST CRT (Registered Tester), CREST CCT APP (Certified — Applications), CREST CCT INF (Certified — Infrastructure), OSCP (Offensive Security Certified Professional), GPEN (GIAC Penetration Tester), and GWAPT (GIAC Web Application Penetration Tester). All tests are conducted under signed Rules of Engagement with full written reports delivered to every client.
Duration depends on scope and complexity. A standard web application test typically takes 3–5 days. Infrastructure assessments range from 5–10 days. Full red team exercises are typically 4–8 weeks including planning, execution and reporting. We always agree scope, timeline and deliverables before any engagement begins, and provide a fixed-price quote with no scope creep surprises.
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