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Subtle and insubstantial, the expert leaves no trace; divinely mysterious, he is inaudible. Convert Docbook To Pdf Windows Xp on this page. Thus he is the master of his enemy's fate. —S UN T ZU Many books discuss how to penetrate computer systems and software. Many authors have already covered how to run hacker scripts, write buffer-overflow exploits, and craft shellcode. Notable examples include the texts Exploiting Software, [1] The Shellcoder's Handbook, [2] and Hacking Exposed. [3] This book is different. Instead of covering the attacks, this book will teach you how attackers stay in after the break-in.

With the exception of computer forensics books, few discuss what to do after a successful penetration. In the case of forensics, the discussion is a defensive one—how to detect the attacker and how to reverse-engineer malicious code. In this book we take an offensive approach.

This book is about penetrating a computer system without being detected. After all, for a penetration to be successful over time, it cannot be detected.

An open-source system, he reasoned, isn't owned by any one company or person, and so it can't disappear just because a business goes belly-up or key. I found I was often using KDE for day-to-day tasks and for work, but I'd switch over to Xfce to run games because they'd run faster and I'd get smoother.

In this chapter we will introduce you to rootkit technology and the general principals of how it works. Rootkits are only part of the computer-security spectrum, but they are critical for many attacks to be successful. Rootkits are not, in and of themselves, malicious. However, rootkits can be used by malicious programs. Understanding rootkit technology is critical if you are to defend against modern attacks. Understanding Attackers' Motives A back door in a computer is a secret way to get access.

Back doors have been popularized in many Hollywood movies as a secret password or method for getting access to a highly secure computer system. But back doors are not just for the silver screen—they are very real, and can be used for stealing data, monitoring users, and launching attacks deep into computer networks. An attacker might leave a back door on a computer for many reasons. Breaking into a computer system is hard work, so once an attacker succeeds, she will want to keep the ground she has gained. She may also want to use the compromised computer to launch additional attacks deeper into the network. A major reason attackers penetrate computers is to gather intelligence. To gather intelligence, the attacker will want to monitor keystrokes, observe behavior over time, sniff packets from the network, and exfiltrate [4] data from the target.