Designing BSD Rootkits: An Introduction to Kernel Hacking PDF Download Ebook. Joseph Kong describes the fundamentals of programming and developing rootkits under the FreeBSD operating system. Author Joseph Kong's goal is to make you smarter, not to teach you how to write exploits or launch attacks. You'll learn how to maintain root access long after gaining access to a computer and how to hack FreeBSD.
Kongs liberal use of examples assumes no prior kernel-hacking experience but doesn't water down the information. All code is thoroughly described and analyzed, and each chapter contains at least one real-world application. Though rootkits have a fairly negative image, they can be used for both good and evil. This book arms you with the knowledge you need to write offensive rootkits, to defend against malicious ones, and to explore the FreeBSD kernel and operating system in the process.
This book covers much of the same sorts of material found in the earlier Rootkits: Subverting the Windows Kernel by Greg Hoglund and James Butler, except Kong's book is all about FreeBSD. I actually read the Windows text first, but found Kong's more direct language and examples easier than the Hoglund/Butler text.
After reading this book, I have a stronger understanding of each of the main chapters' techniques, i.e., kernel modules, hooking, direct kernel object manipulation, kernel object hooking, run-time kernel memory patching, and detection mechanisms. I particularly liked the author showing his sample rootkit's effectiveness against Tripwire, simply to demonstrate his methods.
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