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NT 250 - Cyber Threat Detection and Mitigation

Taught by experts in network defense, this course equips you with the skills to build and maintain Intrusion Detection/Prevention Systems (IDS/IPS) and utilize advanced signature-writing techniques to defend large-scale network infrastructures. You will begin with writing basic IDS signatures to identify traffic of interest and advance to creating complex signatures to recognize distributed attacks, multi-stage events, and other more complex threats. The course also teaches you how to apply decoding and other tools to overcome IDS evasion techniques, how to determine gaps in coverage, and how to manage rule sets to maintain system efficiency. Beyond threat detection and mitigation, you will also learn the benefits and limitations of different IDS/IPS system types.

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Attending students will learn

  • „IDS Types and Features
  • „Sensor Placement
  • „Sensor Configuration
  • „Signature Writing Basics
  • „IDS Evasion Techniques
  • „TCP and UDP Conversation Reassembly
  • „Signature Tuning
  • „Sensor Tuning
  • „Event Filtering and Post Detection Event Analysis
  • „Attacks on IDS Sensors and Mitigation Techniques

Who should attend

  • „Incident Responders who need to understand and react to IDS alerts
  • „Network Defenders seeking to automate threat detection
  • „Security Managers who desire to improve their defensive model
  • „IDS administrators who wish to improve their signature writing skills
  • „Security Operations Center Staff seeking to automate traffic analysis
  • „Penetration Testers looking to reduce their network visibility


Course Outline

Day 1

  • „Intrusions (Types and Methodologies)
  • „Common Threats
  • „Intrusion Detection Systems In Depth
  • „Introduction to Snort

Day 2

  • „Snort Configuration and Variables
  • „Snort Output
  • „Output Plugins
  • „Signature Writing
  • „Snort Rule Options

Day 3

  • „Detect Offset Pointer
  • „Doe Content Modifiers
  • „Doe Rule Options
  • „Snort Packet Header Rule Options
  • „Pre-Processors

Day 4

  • „Post Detection Rules
  • „Effective Rule Writing
  • „Perl compatible regular expressions (PCRE)
  • „Tracking State Across Sessions
  • „Group Exercise

Day 5 – Student Practical Demonstration

„Students are given several packet captures containing a variety of scanning and exploitation techniques. They are tasked with identifying the significant elements of the attack and translating them into IDS signatures. Finally, they are tasked with tuning those signatures to reduce false positives and limit excessive events

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