Quick Answer
The answer is to lower the threshold for failed login alerts in the SIEM. This is the most effective immediate action because the core issue is a monitoring gap caused by a threshold set too high, which prevents the SIEM from triggering alerts on anomalous activity. By reducing the threshold, you directly enable the system to detect the surge in failed logins, allowing for timely incident response without a full system overhaul. On the CRISC exam, this scenario tests your ability to prioritize a risk response that addresses the root cause of a control failure—here, a detection control misconfiguration—rather than implementing a new control or conducting a lengthy analysis. A common trap is choosing to investigate the logs manually or implement a new authentication system, but the immediate action must fix the broken alerting mechanism. Memory tip: “Threshold too high? Lower it to spy.”
This CRISC practice question tests your understanding of risk and control monitoring and reporting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A security analyst notices that the number of failed login attempts has significantly increased over the past week. The SIEM alerts are not being triggered because the threshold was set too high. What is the MOST effective immediate action to improve monitoring?
Implement a new authentication system with biometrics.
Why wrong: Too costly and time-consuming for immediate action.
Lower the threshold for failed login alerts in the SIEM.
Directly fixes the issue of missed alerts.
Enable all SIEM rules to capture every event.
Why wrong: Causes alert fatigue and operational overload.
Review logs manually each day to identify anomalies.
Why wrong: Manual review is not scalable and may miss events.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Lower the threshold for failed login alerts in the SIEM.
B is correct because the immediate issue is that the SIEM alert threshold is set too high, causing failed login attempts to go undetected. Lowering the threshold directly addresses the monitoring gap by ensuring that the SIEM generates alerts for anomalous failed login activity, enabling timely incident response without requiring a system overhaul.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Implement a new authentication system with biometrics.
Why it's wrong here
Too costly and time-consuming for immediate action.
Lower the threshold for failed login alerts in the SIEM.
Why this is correct
Directly fixes the issue of missed alerts.
Related concept
Read the scenario before looking for a memorised answer.
Enable all SIEM rules to capture every event.
Why it's wrong here
Causes alert fatigue and operational overload.
Review logs manually each day to identify anomalies.
Why it's wrong here
Manual review is not scalable and may miss events.
Common exam traps
The trap here is that candidates may choose a more 'secure' but non-immediate option like biometrics (A) or a broad-brush approach like enabling all rules (C), failing to recognize that the question specifically asks for the 'most effective immediate action' to fix the monitoring gap caused by a misconfigured threshold.
Detailed technical explanation
SIEM systems like Splunk or QRadar use correlation rules with configurable thresholds (e.g., 'more than 10 failed logins within 5 minutes') to reduce false positives. Lowering the threshold too aggressively can trigger alerts from benign user errors (e.g., mistyped passwords), so tuning should balance sensitivity with specificity, often using baselines derived from historical data. In a real-world scenario, an attacker performing a password spraying attack might generate just under the original threshold per account, evading detection until the threshold is adjusted.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CRISC exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Risk and Control Monitoring and Reporting — This question tests Risk and Control Monitoring and Reporting — Read the scenario before looking for a memorised answer..
The correct answer is: Lower the threshold for failed login alerts in the SIEM. — B is correct because the immediate issue is that the SIEM alert threshold is set too high, causing failed login attempts to go undetected. Lowering the threshold directly addresses the monitoring gap by ensuring that the SIEM generates alerts for anomalous failed login activity, enabling timely incident response without requiring a system overhaul.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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