Book Image

Hands-On Network Forensics

By : Nipun Jaswal
2 (2)
Book Image

Hands-On Network Forensics

2 (2)
By: Nipun Jaswal

Overview of this book

Network forensics is a subset of digital forensics that deals with network attacks and their investigation. In the era of network attacks and malware threat, it’s now more important than ever to have skills to investigate network attacks and vulnerabilities. Hands-On Network Forensics starts with the core concepts within network forensics, including coding, networking, forensics tools, and methodologies for forensic investigations. You’ll then explore the tools used for network forensics, followed by understanding how to apply those tools to a PCAP file and write the accompanying report. In addition to this, you will understand how statistical flow analysis, network enumeration, tunneling and encryption, and malware detection can be used to investigate your network. Towards the end of this book, you will discover how network correlation works and how to bring all the information from different types of network devices together. By the end of this book, you will have gained hands-on experience of performing forensics analysis tasks.
Table of Contents (16 chapters)
Free Chapter
1
Section 1: Obtaining the Evidence
4
Section 2: The Key Concepts
8
Section 3: Conducting Network Forensics

Automation through pyshark – Python's tshark

We wrote the preceding script with some complexity. We could have also achieved this using pyshark. Pyshark is a Python library that provides an API for accessing tshark. Let's create a small Python script using the pyshark library, as follows:

import pyshark
import struct

#Place your PCAP here
cap = pyshark.FileCapture(r'C:\Users\Apex\Desktop\loki-bot_network_traffic.pcap')
def Exfil(pkt):
try:
if pkt.http.request_method == "POST":
if pkt.http.user_agent == "Mozilla/4.08 (Charon; Inferno)":
print "Infected IP:" + pkt.ip.src
print "Communicating From:" + pkt[pkt.transport_layer].srcport
print "Malicious HTTP Request:" + pkt.http.request_uri
print "Malicious User...