soc-endpoint-security-monitor

--| | DLP | Data Loss Prevention; technology that detects and prevents unauthorized transmission of sensitive data | | SIT | Sensitive Information Type; pattern matching rules for identifying sensitive data (regex, keywords, ML classifiers) | | Policy Tip | User-facing notification explaining why an action was blocked and how to request an override | | Content Inspection | Deep inspection of file contents to identify sensitive data patterns | | Exact Data Match (EDM) | DLP matching against a specific database of known sensitive values (exact SSNs, employee records) |

Tools & Systems

• Microsoft Purview DLP: Cloud-managed endpoint DLP included in M365 E5
• Symantec DLP (Broadcom): Enterprise DLP with endpoint, network, and cloud modules
• Digital Guardian: Endpoint DLP with data classification and protection
• Forcepoint DLP: Unified DLP platform with endpoint agent
• Code42 Incydr: Insider risk detection with file exfiltration monitoring

Common Pitfalls

• Over-blocking in enforcement mode: Deploy DLP in audit mode first. Blocking common workflows without warning causes productivity loss.
• Too many SIT false positives: Phone numbers, dates, and random number sequences can match PCI/SSN patterns. Tune confidence levels and require corroborating keywords.
• Ignoring user education: DLP is most effective when users understand why data is protected. Policy tips should explain the restriction and provide approved alternatives.
• Not monitoring overrides: If users frequently override DLP blocks, the policy is either too restrictive or users are ignoring data protection requirements. Review override reasons.