Elastic Certified SIEM Analyst case studies
Elastic Certified SIEM Analyst · Put your knowledge to work in context.
The Elastic Certified SIEM Analyst credential is aimed at security operations practitioners who work day to day inside Elastic Security - SOC analysts, detection engineers, and threat hunters who need to prove they can run the platform rather than just describe it. The exam blueprint spans the full analyst workflow: cluster architecture and space configuration; onboarding data through Elastic Agent and integrations while normalizing to the Elastic Common Schema; building and tuning detection rules, alerts, and exceptions; investigating and hunting in Kibana with Discover, Timeline, and the query languages; case management, alert triage, and automated response; and endpoint prevention with host and network visibility. The Elastic Certified SIEM Analyst case studies are 6 cases and about 4,982 words.
1Missing alerts after an ingest spike and a new tenant space
You run a self-managed 8.13 cluster: three hot nodes (16 vCPU / 64 GB, 30-day hot tier), three warm nodes, three dedicated master-eligible nodes. Ingest was 2 TB/day until a new APAC region brought it to 3.6 TB/day.
880 words, about 4 min2CIDR rule fires on Windows but never on firewall data
Your Fleet deployment manages 1,800 agents. Ingest includes logs-windows.security- from domain controllers, logs-endpoint.events.process- , and a custom TCP integration receiving roughly 400 M events/day of PAN-OS traffic plus 90 M/day of Fortinet traffic.
822 words, about 4 min31,400 alerts/day: tuning two rules without going blind
Fourteen custom rules plus prebuilt rules generate about 1,400 alerts on a weekday. Roughly 1,290 come from Potential Credential Access via LSASS Memory Dump and Suspicious Rundll32 Network Activity .
835 words, about 4 min4EQL sequence returns zero rows for known lateral movement
You are hunting suspected lateral movement after a helpdesk ticket about a locked account. Sources are logs-windows.security- (4624, 4625, 4771) and logs-endpoint.events.process- , with 30 days hot and 6 months warm.
807 words, about 4 min5Auto-isolation that took out a domain controller
Elastic Defend runs on 5,200 endpoints: 9 domain controllers, 400 production servers, 4,800 workstations. Twenty-two rules generate about 380 alerts/day.
785 words, about 4 min6One Defend policy for 5,000 heterogeneous endpoints
Elastic Defend 8.13 runs on 5,000 endpoints: 4,800 Windows, 150 Linux, 50 macOS. All agents share one policy with event capture set to all events, malware protection set to prevent, ransomware protection set to prevent, and memory protection on.
853 words, about 4 min