SPLK-5002 Exam Dumps - Splunk Certified Cybersecurity Defense Engineer

How to Reduce False Positives in Correlation Searches?

High false positives can overwhelm SOC teams, causing alert fatigue and missed real threats. The best solution is to fine-tune suppression rules and refine thresholds.

🔹How Suppression Rules & Threshold Tuning Help:✅Suppression Rules: Prevent repeated false positives from low-risk recurring events (e.g., normal system scans).✅Threshold Refinement: Adjust sensitivity to focus on true threats (e.g., changing a login failure alert from 3 to 10 failed attempts).

💡Example in Splunk ES:🚀Scenario: A correlation search generates too many alerts for failed logins.✅Fix: SOC analysts refine detection thresholds:

Suppress alerts if failed logins occur within a short timeframe but are followed by a successful login.

Only trigger an alert if failed logins exceed 10 attempts within 5 minutes.

Why Not the Other Options?

❌A. Increase the frequency of the correlation search – Increases search load without reducing false positives.❌C. Disable the correlation search temporarily – Leads to blind spots in detection.❌D. Limit the search to a single index – May exclude critical security logs from detection.

References & Learning Resources

📌Splunk ES Correlation Search Optimization Guide: https://docs.splunk.com/Documentation/ES 📌Reducing False Positives in SOC Workflows: https://splunkbase.splunk.com 📌Fine-Tuning Security Alerts in Splunk: https://www.splunk.com/en_us/blog/security

Security metrics help organizations assess their security posture and make data-driven decisions.

Primary Purpose of Security Metrics in Splunk:

Measure Security Effectiveness (B)

Tracks incident response times, threat detection rates, and alert accuracy.

Helps SOC teams and leadership evaluate security program performance.

Improve Threat Detection & Incident Response

Identifies gaps in detection logic and false positives.

Helps fine-tune correlation searches and notable events.

Threat intelligence in Splunk Enterprise Security (ES) enhances SOC capabilities by identifying known attack patterns, suspicious activity, and malicious indicators.

Essential Steps in Developing Threat Intelligence:

Collecting Data from Trusted Sources (A)

Gather data from threat intelligence feeds (e.g., STIX, TAXII, OpenCTI, VirusTotal, AbuseIPDB).

Include internal logs, honeypots, and third-party security vendors.

Analyzing and Correlating Threat Data (C)

Use correlation searches to match known threat indicators against live data.

Identify patterns in network traffic, logs, and endpoint activity.

Operationalizing Intelligence Through Workflows (E)

Automate responses using Splunk SOAR (Security Orchestration, Automation, and Response).

Enhance alert prioritization by integrating intelligence into risk-based alerting (RBA).

Why Are These Practices Essential for SOP Development?

Standard Operating Procedures (SOPs)are crucial for ensuring consistent, repeatable, and effective security operations in aSecurity Operations Center (SOC). Strengthening SOP development ensuresefficiency, clarity, and adaptabilityin responding to incidents.

1️⃣Regular Updates Based on Feedback (Answer A)

Security threats evolve, andSOPs must be updatedbased onreal-world incidents, analyst feedback, and lessons learned.

Example: Anew ransomware variantis detected; theSOP is updatedto include aspecific containment playbookin Splunk SOAR.

2️⃣Collaborating with Cross-Functional Teams (Answer C)

Effective SOPs requireinput from SOC analysts, threat hunters, IT, compliance teams, and DevSecOps.

Ensures thatall relevant security and business perspectivesare covered.

Example: ASOC team collaborates with DevOpsto ensure that acloud security response SOPaligns with AWS security controls.

3️⃣Including Detailed Step-by-Step Instructions (Answer D)

SOPs should provideclear, actionable, and standardizedsteps for security analysts.

Example: ASplunk ES incident response SOPshould include:

How to investigate a security alertusing correlation searches.

How to escalate incidentsbased on risk levels.

How to trigger a Splunk SOAR playbookfor automated remediation.

Why Not the Other Options?

❌B. Focusing solely on high-risk scenarios–All security events matter, not just high-risk ones.Low-level alertscan be early indicators of larger threats.❌E. Excluding historical incident data– Past incidents providevaluable lessonsto improveSOPs and incident response workflows.

References & Learning Resources

📌Best Practices for SOPs in Cybersecurity:https://www.nist.gov/cybersecurity-framework 📌Splunk SOAR Playbook SOP Development: https://docs.splunk.com/Documentation/SOAR 📌Incident Response SOPs with Splunk: https://splunkbase.splunk.com

How Splunk SOAR Improves Phishing Response?

Phishing attacks require fast detection and response. Manual investigation delays can be eliminated using Splunk SOAR automation.

🔹Why Use Playbooks for Automated Email Triage? (Answer B)✅Extracts email headers and attachments for analysis✅Checks links & attachments against threat intelligence feeds✅Automatically quarantines or deletes malicious emails✅Escalates high-risk cases to SOC analysts

💡Example Playbook Workflow in Splunk SOAR:🚀Scenario: A suspicious email is reported.✅Splunk SOAR playbook automatically:

Extracts sender details & checks against threat intelligence

Analyzes URLs & attachments using VirusTotal/Sandboxing

Tags the email as "Malicious" or "Safe"

Quarantines the email & alerts SOC analysts

Why Not the Other Options?

❌A. Prioritizing phishing cases manually – Still requires manual effort, leading to delays.❌C. Assigning cases to analysts in real-time – Doesn’t solve the issue of slow manual investigations.❌D. Increasing the indexing frequency of email logs – Helps with log retrieval but doesn’t automate phishing response.

References & Learning Resources

📌Splunk SOAR Phishing Playbook Guide: https://docs.splunk.com/Documentation/SOAR 📌Phishing Detection Automation in Splunk: https://splunkbase.splunk.com 📌Email Threat Intelligence with SOAR: https://www.splunk.com/en_us/blog/security