The answer is the number of unauthorized remote access attempts. This KRI is most effective for ransomware detection because unauthorized remote access is a common initial vector for ransomware deployment, often preceding encryption events by hours or days. Monitoring spikes in failed or anomalous remote logins provides a direct, detective signal of an active threat, unlike preventive controls such as patch management or corrective measures like backup restoration. On the CRISC exam, this question tests your ability to distinguish between detective, preventive, and corrective KRIs within the risk response lifecycle—a frequent trap is choosing a preventive KRI when the prompt specifically asks for early detection. Remember the memory tip: “Detect the door, don’t just lock it”—unauthorized access attempts are the door being rattled, not the lock itself.
CRISC IT Risk Identification Practice Question
This CRISC practice question tests your understanding of it risk identification. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization has recently suffered a ransomware attack that encrypted critical files. During the post-incident review, the risk team is identifying key risk indicators (KRIs) to improve early detection. Which of the following KRIs would be MOST effective in detecting similar attacks in the future?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Number of unauthorized remote access attempts.
Option A is correct because unauthorized remote access attempts are a direct indicator of potential ransomware vectors. Option B is important but not the most direct for detection. Option C is preventive, not detective. Option D is corrective.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Frequency of antivirus signature updates.
Why it's wrong here
Updates are preventive, not a real-time detection indicator.
✓
Number of unauthorized remote access attempts.
Why this is correct
Direct indicator of possible ransomware entry.
Related concept
Static NAT maps one inside address to one outside address.
✗
Percentage of employees who completed security awareness training.
Why it's wrong here
Training is preventive, not a direct detection metric.
✗
Time to patch critical vulnerabilities.
Why it's wrong here
Patching is a corrective control, not a detection KRI.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CRISC NAT questions on configuration and troubleshooting.
IT Risk Identification — This question tests IT Risk Identification — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Number of unauthorized remote access attempts. — Option A is correct because unauthorized remote access attempts are a direct indicator of potential ransomware vectors. Option B is important but not the most direct for detection. Option C is preventive, not detective. Option D is corrective.
What should I do if I get this CRISC question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CRISC NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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This CRISC practice question is part of Courseiva's free ISACA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CRISC exam.
Question Discussion
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