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OFFENSIVE SECURITY / ADVERSARY SIMULATION

Think Like an Attacker.
Build Like a Defender.

Modern organizations operate across applications, APIs, cloud infrastructure, mobile platforms, networks and increasingly AI-powered systems. Our offensive security practice helps organizations identify weaknesses across these attack surfaces through structured, authorized security testing.

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YOURORGANIZATION
WEBAPIMOBILENETWORKCLOUDAI / LLMIDENTITY
ATTACK PATHATTACK SURFACE
// THE MODERN ATTACK SURFACE

Your Attack Surface Is Bigger Than Your Website.

Security testing scoped to “the website” made sense when the website was the product. Most organizations now run on a surface several times that size.

TRADITIONAL3 SURFACES
  • WEB
  • NETWORK
  • SERVER

A perimeter, a website and the servers behind them.

MODERN8 SURFACES
  • WEB
  • API
  • MOBILE
  • CLOUD
  • IDENTITY
  • THIRD-PARTY
  • AI
  • AGENTS

Each one is reachable, and each one fails differently.

As technology expands, the attack surface expands with it — and the parts added most recently are usually the parts tested least.

// OFFENSIVE SECURITY CAPABILITIES

Test Every Layer of the Attack Surface.

Seven testing services, scoped individually or combined into a programme.

01Web Application SecurityIdentify security weaknesses across modern web applications before attackers exploit them.EXPLORE →02API SecurityAPIs are the connective layer behind modern applications. Test them as seriously as the applications they power.EXPLORE →03Mobile App SecurityAssess mobile applications and the backend systems they depend on.EXPLORE →04Network Penetration TestingIdentify weaknesses across authorized network infrastructure, exposed services and segmentation boundaries.EXPLORE →05Cloud Penetration TestingModern cloud environments introduce new identities, services and trust relationships. Assess them before those relationships become attack paths.EXPLORE →06Red TeamingSimulate realistic adversarial scenarios to evaluate how people, technology and security operations respond to an attack.EXPLORE →07AI & LLM SecurityAI systems are creating a new layer of application risk. Test models, prompts, agents, tools and data flows as part of the modern attack surface.EXPLORE →
// METHODOLOGY

A Methodology Built Around Attack Paths.

  1. 01RECONNAISSANCEUnderstand the authorized attack surface.
  2. 02ENUMERATIONMap applications, APIs, infrastructure and exposed functionality.
  3. 03VALIDATIONValidate potential security weaknesses safely.
  4. 04EXPLOITATIONDemonstrate exploitability within the agreed scope.
  5. 05IMPACT ANALYSISUnderstand business and technical impact.
  6. 06REPORTINGProvide evidence, severity and remediation guidance.
  7. 07RETESTValidate that identified issues have been addressed.

Every stage operates inside a scope and rules of engagement agreed in writing before testing begins.

// WHAT WE LOOK FOR

What We Look For

These are categories of weakness we assess, described at a level useful for scoping. Findings are documented with reproduction detail privately to your team — this page is a description of the service, not exploitation guidance.

// FROM FINDING TO FIXING

A Finding Is Only Useful If You Can Act On It.

  1. DISCOVERIdentify the weakness.
  2. VALIDATEConfirm it is real and reproducible.
  3. PRIORITIZERank it against your environment.
  4. REMEDIATEGuidance your team can act on.
  5. RETESTVerify the fix holds.

We don’t want security findings to become another spreadsheet your team never revisits. Reporting should let both technical and business stakeholders answer four questions without needing us in the room.

01

What is wrong

The weakness, described precisely enough to locate.

02

Why it matters

What it means in your environment, not a generic score.

03

What can be done

Practical remediation direction, including where it belongs.

04

What to fix first

Ordering, so limited engineering time goes to the right place.

Remediation outcomes depend on the changes your team implements. We provide findings, context and guidance — not a guarantee of a particular result.

// WHO NEEDS OFFENSIVE SECURITY

Different sectors, the same question.

What is reachable, and what would it cost us if someone reached it?

FINTECHPayment flows, account access and transaction logic.
HEALTHCAREPatient data, portals and third-party integrations.
SAASMulti-tenancy, role separation and customer data isolation.
E-COMMERCECheckout, pricing logic, accounts and payment integrations.
ENTERPRISEInternal networks, identity estates and legacy systems.
TECHNOLOGYProduct security across applications, APIs and infrastructure.
STARTUPSEstablishing a security baseline before scale makes it harder.
DIGITAL SERVICESClient-facing platforms and the data they hold.

Sector experience is described in general terms. We do not claim industry-specific certification or accreditation on this page.

// WHEN SHOULD YOU TEST

Testing tracks change, not the calendar.

An annual test on a system that ships weekly measures a version that no longer exists. These are the moments where testing tends to be worth most.

  1. 01BEFORE LAUNCHFind issues while changing the design is still cheap.
  2. 02MAJOR RELEASESignificant functional change means significant new surface.
  3. 03NEW API / FEATURENew endpoints bring new authorization decisions.
  4. 04INFRASTRUCTURE CHANGEMigrations and re-platforming move trust boundaries.
  5. 05PERIODIC VALIDATIONEnvironments drift even when nothing is deliberately changed.
  6. 06AFTER REMEDIATIONConfirm the fix works and did not introduce something new.
// WHAT YOU RECEIVE

A report your team can actually act on.

Exact deliverables and their format are confirmed during scoping.

EXECUTIVE SUMMARY

What was assessed, what was found and what it means, written to be read by people who will not read the technical detail.

TECHNICAL FINDINGS

Each finding described with enough precision for an engineer to locate and understand it.

EVIDENCE

Reproduction detail and supporting evidence, so findings can be verified rather than taken on trust.

RISK CONTEXT

Severity considered against your environment, not only against a generic scoring table.

REMEDIATION GUIDANCE

Practical direction on addressing each finding, including where a change belongs architecturally.

RETEST / VALIDATION

Verification that addressed findings no longer reproduce, within the agreed retest scope.

// WHY TMG SECURITY

How this practice is put together.

01 — PRACTICAL SECURITY THINKING

Findings you can act on

The objective is not a longer report. It is a clear account of what is exposed, what it would take to abuse it and what to do about it.

02 — MULTI-LAYER ATTACK SURFACE

Tested as one surface

Web, API, mobile, network, cloud and AI are assessed as connected layers, because attack paths rarely stay inside one of them.

03 — APPLICATION + API + INFRASTRUCTURE

The whole path

An application finding often resolves to an API control, and an API finding often resolves to infrastructure. We follow it through.

04 — EMERGING AI SECURITY

The newest layer

AI, LLM and agent security is an active part of the practice, assessed with the same structure as the rest of the surface.

05 — TECHNICAL REPORTING

Written to be used

Enough detail for an engineer to reproduce a finding, and enough context for a decision-maker to prioritise it.

06 — SECURITY + EDUCATION ECOSYSTEM

Testing that teaches

TMG operates security services and cybersecurity education together, so engagements can leave a team better equipped, not just informed.

Know Your Attack Surface Before Someone Else Does.

Whether you are launching a new application, securing APIs, moving workloads to the cloud, assessing mobile applications or evaluating emerging AI systems, TMG Security can help you understand where security weaknesses may exist within an authorized scope.

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