Question

Difficulty: MediumRisk Identification, Assessment, and Response Strategies

A financial enterprise is conducting a quantitative risk assessment on an internal database cluster. The asset value (AVAV) of the database cluster is estimated at $400,000\$400,000. Threat intelligence estimates that a single ransomware incident would result in an exposure factor (EFEF) of 0.150.15 (15%15\%). Historical occurrence data indicates that such an incident is likely to occur once every four years, giving an annual rate of occurrence (AROARO) of 0.250.25. Which of the following is the estimated Annual Loss Expectancy (ALEALE) for this asset?

  1. $15,000\$15,000Answer
  2. B
    $60,000\$60,000
  3. C
    $100,000\$100,000
  4. D
    $240,000\$240,000

Answer

The estimated Annual Loss Expectancy (ALEALE) for the database cluster is $15,000\$15,000.
The correct formula for Annual Loss Expectancy is ALE=SLE×AROALE = SLE \times ARO, where SLE=AV×EFSLE = AV \times EF. Multiplying $400,000\$400,000 by an exposure factor of 0.150.15 yields a Single Loss Expectancy (SLESLE) of $60,000\$60,000. Multiplying $60,000\$60,000 by an AROARO of 0.250.25 yields an ALEALE of $15,000\$15,000.

Step-by-Step Solution

1
Calculate the Single Loss Expectancy (SLESLE)
SLE=AV×EF=$400,000×0.15=$60,000SLE = AV \times EF = \$400,000 \times 0.15 = \$60,000
Determines the expected monetary loss resulting from a single risk event.
2
Calculate the Annual Loss Expectancy (ALEALE)
ALE=SLE×ARO=$60,000×0.25=$15,000ALE = SLE \times ARO = \$60,000 \times 0.25 = \$15,000
Determines the projected annualized loss by multiplying the single loss expectancy by its annual rate of occurrence.

Key Concept

Quantitative Risk Calculation (ALE, SLE, ARO, EF)
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