Gather user data, machine data, and historical activity related to the alert.
Beyond reactive alert handling, analysts conduct structured threat hunts based on hypotheses related to specific adversary tactics, techniques, and procedures (TTPs). Common proactive techniques include:
An integrated Threat Intelligence Platform weaves intelligence directly into SOC operations, helping detect with precision and respond faster. By ingesting intelligence from commercial feeds (Recorded Future, ReversingLabs), open-source sources (MISP, AlienVault OTX), and industry ISACs, analysts can enrich indicators with verdicts, context, and historical threat actor associations. effective threat investigation for soc analysts pdf
: Data Loss Prevention (DLP) alerts, cloud storage access logs (SharePoint/OneDrive), and USB mass storage device logs.
Once you confirm the alert is not an obvious false positive, analyze the host and network artifacts deeply. Host-Based Analysis (EDR Focus) Look for signs of adversary activity on the endpoint: Gather user data, machine data, and historical activity
: Does the compromised account belong to a standard employee, an administrator, or an executive?
Analyzing network firewall and web proxy logs for C&C communication. Host-Based Analysis (EDR Focus) Look for signs of
Master Guide: Effective Threat Investigation for SOC Analysts
Finding all compromised systems, accounts, and data. 2. Core Frameworks for SOC Investigations
Effective threat investigation is a skill developed through practice and curiosity. Every closed alert provides an opportunity to tune your Security Information and Event Management (SIEM) rules, update your playbooks, and strengthen your organization's security posture.
Author new SIEM detection rules or Yara signatures specifically tailored to catch the nuances of the attack you just mitigated.