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Packet Analysis Summary

Objectives

  • Understand Packet Analysis: Learn the fundamental concepts of packet analysis and its critical role in network security.
  • Tool Proficiency: Gain practical experience with tools like Wireshark to analyze network packets effectively.
  • Protocol Identification: Identify and understand common network protocols and their headers within captured packets.
  • Traffic Pattern Analysis: Analyze network traffic to identify anomalies and potential security threats.

TLO Knowledge and Skills

Condition

Given a classroom setting, relevant references, and practical exercises, Cyber Mission Force students will demonstrate a comprehensive understanding of packet analysis.

Knowledge

  • Packet Analysis Overview: Introduction to the principles and methodologies used in packet analysis.
  • Nmap Capabilities: Understanding the features and functionalities of Nmap for network scanning and security auditing.
  • Netcat/Cryptcat: Learn about Netcat and Cryptcat tools for reading from and writing to network connections.
  • Network Scan Methodologies: Explore different techniques for scanning networks to identify active hosts and services.
  • Host Scan Methodologies:
  • No-Operation (NOOP) Sled: Techniques for creating buffer overflow exploits using NOOP instructions.
  • One-Byte NOOP Sled: Utilizing single-byte NOOP instructions for exploit development.
  • Multi-Byte NOOP Sled: Employing multiple bytes in NOOP sleds for more complex exploits.
  • Trampoline Sled: Advanced exploit method involving trampoline techniques to redirect execution flow.
  • Defense Packet Analysis:
  • Shell Code: Analysis and detection of shell code used in exploits.
  • Connect Back: Understanding reverse shell techniques where the target machine connects back to the attacker's machine.
  • Port Bind: Analysis of bind shell techniques where a port on the target machine is bound to a shell.
  • Defense Mechanisms:
  • Man in the Middle Attack: Techniques to detect and prevent interception of communications.
  • IP Spoofing: Identification and mitigation of IP address spoofing.
  • IPv6 Vulnerabilities: Understanding security vulnerabilities specific to IPv6.
  • Neighborhood Discovery Protocol: Security implications and defenses related to Neighbor Discovery Protocol in IPv6.
  • Trespassing: Detecting unauthorized access within a network.
  • Routing Headers:
  • Ethernet: Analyzing Ethernet frames and their components.
  • IPv4 and IPv6: Detailed examination of IPv4 and IPv6 headers.
  • TCP and UDP: Understanding the headers and functionalities of TCP and UDP protocols.
  • HTTP: Analysis of HTTP headers and message structures.
  • ICMP: Understanding ICMP messages and their roles in network diagnostics.

Skills

  • Port Scanning: Conducting basic port scans and interpreting the output to identify open ports and services.
  • Header Analysis: Identifying source and destination addresses, TTL, and fragmentation status from packet headers.
  • ICMP Message Identification: Recognizing and understanding different message types within ICMP headers.
  • SMTP Header Analysis: Extracting host information from SMTP headers.
  • HTTP Binary Data Identification: Identifying and analyzing binary data within HTTP message bodies.

Relevant "Practical" PE Questions

Netcat/Cryptcat:

01-0001, 01-0002

NMAP:

01-0003, 01-0004, 01-0005, 01-0007, 01-0010

Wireshark:

01-0008, 01-0009, 01-0011 through 01-0024, 01-0124 through 01-0130

What are your questions?