SIEM Basics: Log Analysis & Correlation

Logs are useless if nobody looks at them. A SIEM (Security Information and Event Management) system centralizes and correlates logs.

Log Sources

Ingest logs from Firewalls, Active Directory, Endpoint Anti-Virus, and critical Application servers.

Correlation Rules

Write rules to detect patterns. Example: "5 Failed Logins followed by 1 Successful Login from the same IP within 1 minute" might indicate a successful brute-force attack.