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Building IT Risk Scenarios

Risk scenarios · 1 min read

Why scenarios

“Cyber risk” can’t be rated or owned. “A criminal group phishes finance staff and diverts a 500,000 payment” can. Risk scenarios make risk concrete enough for the business to judge likelihood and impact and decide what to do.

Anatomy of a scenario

Actor, threat event, asset, consequence, time and context.

Top-down and bottom-up

Top-down from business objectives; bottom-up from assets and threats; use both.

Example. Top-down, the sales director asks what could stop the online store at peak season. Bottom-up, the security team lists threats to the web platform. Together they produce eight scenarios, each linked to the peak-season objective.

Building them well

  • Involve business owners and technical experts together.
  • Use generic scenario libraries only as a starting point.
  • Keep the number manageable, focused on what matters.
  • Link each scenario to an objective and an owner.

How the exam asks about it

If the question asks…The answer is usually…
PRIMARY benefit of risk scenariosMake risk concrete for business decisions
BEST way to build scenariosWorkshops with business and technical stakeholders
Top-down approach starts withBusiness objectives
Using another firm’s scenario listTailor it to this organisation

In short

  • A risk scenario describes an actor, a threat event, the asset affected, the consequence and the timing or context.
  • Scenarios turn abstract risk into concrete stories that owners can recognise, rate and own.
  • Top-down scenarios start from business objectives; bottom-up scenarios start from assets and threats.
  • Use both approaches: top-down for relevance, bottom-up for realism.
  • Build scenarios with business and technical stakeholders together.
  • Generic risk lists from other organisations are a starting point, not a substitute.

Exam traps

  • Writing one-word scenarios such as 'hackers' or 'cyber'.
  • Building scenarios only with the IT team.
  • Copying another organisation's scenario list without tailoring.
  • Producing hundreds of technical scenarios with no business link.

Slides

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CRISC · Domain 2 · Risk scenarios

Building IT Risk Scenarios

How to write risk scenarios that the business recognises and can rate, using top-down and bottom-up approaches, and why scenarios are the core of IT risk assessment.

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