Monitoring

SIEM & Monitoring Stack

Deploying centralized logging and security monitoring

50+

Log Sources

75+

Alert Rules

60%

MTTR Reduction

The Problem

Security events were scattered across individual systems with no centralized visibility. When investigating potential incidents, the IT team had to manually check logs on multiple servers and devices, making thorough investigation impractical.

Key Challenges

  • Logs existed but weren't being actively monitored or retained long-term
  • No correlation of events across different systems
  • Investigation of security incidents took days instead of hours
  • Compliance requirements mandated centralized log retention

Business Impact: Security blind spots, slow incident response, and inability to demonstrate compliance with log retention requirements.

The Solution

Deployed Elastic Stack for centralized log aggregation with custom dashboards and alerting rules tailored to the organization's infrastructure and threats.

Implementation Steps

  1. 1Deployed Elasticsearch cluster with appropriate sizing for retention requirements
  2. 2Configured Beats agents on Windows servers, network devices, and cloud services
  3. 3Built Kibana dashboards for security monitoring and operational visibility
  4. 4Created detection rules based on MITRE ATT&CK framework
  5. 5Integrated with Microsoft 365 and Azure AD for cloud visibility
  6. 6Established alert triage procedures and escalation paths

Technologies Used

ElasticsearchKibanaBeatsLogstashElastic AgentMicrosoft Graph API

The Outcome

Results Achieved

  • 50+ log sources centralized with 90-day online retention
  • 75+ detection rules covering common attack techniques
  • Mean time to detect (MTTD) reduced from days to minutes
  • 60% reduction in mean time to respond (MTTR)
  • Achieved compliance with audit log retention requirements

Lessons Learned

  • Start with high-value log sources and expand - don't try to collect everything at once
  • Tune alert thresholds based on environment - false positives cause alert fatigue
  • Dashboards are only useful if someone is actually looking at them
  • Document what each alert means and how to investigate it

Related Topics

ElasticSIEMKibanaSecurity Monitoring