Wireshark for Security Professionals

Introduction xiii Chapter 1 Introducing Wireshark 1 What Is Wireshark? 2 A Best Time to Use Wireshark? 2 Avoiding Being Overwhelmed 3 The Wireshark User Interface 3 Packet List Pane 5 Packet Details Pane 6 Packet Bytes Pane 8 Filters 9 Capture Filters 9 Display Filters 13 Summary 17 Exercises 18 Chapter 2 Setting Up the Lab 19 Kali Linux 20 Virtualization 22 Basic Terminology and Concepts 23 Benefi ts of Virtualization 23 VirtualBox 24 Installing VirtualBox 24 Installing the VirtualBox Extension Pack 31 Creating a Kali Linux Virtual Machine 33 Installing Kali Linux 40 The W4SP Lab 46 Requirements 46 A Few Words about Docker 47 What Is GitHub? 48 Creating the Lab User 49 Installing the W4SP Lab on the Kali Virtual Machine 50 Setting Up the W4SP Lab 53 The Lab Network 54 Summary 55 Exercises 56 Chapter 3 The Fundamentals 57 Networking 58 OSI Layers 58 Networking between Virtual Machines 61 Security 63 The Security Triad 63 Intrusion Detection and Prevention Systems 63 False Positives and False Negatives 64 Malware 64 Spoofi ng and Poisoning 66 Packet and Protocol Analysis 66 A Protocol Analysis Story 67 Ports and Protocols 71 Summary 73 Exercises 74 Chapter 4 Capturing Packets 75 Sniffi ng 76 Promiscuous Mode 76 Starting the First Capture 78 TShark 82 Dealing with the Network 86 Local Machine 87 Sniffi ng Localhost 88 Sniffi ng on Virtual Machine Interfaces 92 Sniffi ng with Hubs 96 SPAN Ports 98 Network Taps 101 Transparent Linux Bridges 103 Wireless Networks 105 Loading and Saving Capture Files 108 File Formats 108 Ring Buffers and Multiple Files 111 Recent Capture Files 116 Dissectors 118 W4SP Lab: Managing Nonstandard HTTP Traffi c 118 Filtering SMB Filenames 120 Packet Colorization 123 Viewing Someone Else's Captures 126 Summary 127 Exercises 128 Chapter 5 Diagnosing Attacks 129 Attack Type: Man-in-the-Middle 130 Why MitM Attacks Are Effective 130 How MitM Attacks Get Done: ARP 131 W4SP Lab: Performing an ARP MitM Attack 133 W4SP Lab: Performing a DNS MitM Attack 141 How to Prevent MitM Attacks 147 Attack Type: Denial of Service 148 Why DoS Attacks Are Effective 149 How DoS Attacks Get Done 150 How to Prevent DoS Attacks 155 Attack Type: Advanced Persistent Threat 156 Why APT Attacks Are Effective 156 How APT Attacks Get Done 157 Example APT Traffi c in Wireshark 157 How to Prevent APT Attacks 161 Summary 162 Exercises 162 Chapter 6 Off ensive Wireshark 163 Attack Methodology 163 Reconnaissance Using Wireshark 165 Evading IPS/IDS 168 Session Splicing and Fragmentation 168 Playing to the Host, Not the IDS 169 Covering Tracks and Placing Backdoors 169 Exploitation 170 Setting Up the W4SP Lab with Metasploitable 171 Launching Metasploit Console 171 VSFTP Exploit 172 Debugging with Wireshark 173 Shell in Wireshark 175 TCP Stream Showing a Bind Shell 176 TCP Stream Showing a Reverse Shell 183 Starting ELK 188 Remote Capture over SSH 190 Summary 191 Exercises 192 Chapter 7 Decrypting TLS, Capturing USB, Keyloggers, and Network Graphing 193 Decrypting SSL/TLS 193 Decrypting SSL/TLS Using Private Keys 195 Decrypting SSL/TLS Using Session Keys 199 USB and Wireshark 202 Capturing USB Traffi c on Linux 203 Capturing USB Traffi c on Windows 206 TShark Keylogger 208 Graphing the Network 212 Lua with Graphviz Library 213 Summary 218 Exercises 219 Chapter 8 Scripting with Lua 221 Why Lua? 222 Scripting Basics 223 Variables 225 Functions and Blocks 226 Loops 228 Conditionals 230 Setup 230 Checking for Lua Support 231 Lua Initialization 232 Windows Setup 233 Linux Setup 233 Tools 234 Hello World with TShark 236 Counting Packets Script 237 ARP Cache Script 241 Creating Dissectors for Wireshark 244 Dissector Types 245 Why a Dissector Is Needed 245 Experiment 253 Extending Wireshark 255 Packet Direction Script 255 Marking Suspicious Script 257 Snooping SMB File Transfers 260 Summary 262 Index 265