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Learning Linux Binary Analysis

You're reading from   Learning Linux Binary Analysis Learning Linux Binary Analysis

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Product type Paperback
Published in Feb 2016
Publisher Packt
ISBN-13 9781782167105
Length 282 pages
Edition 1st Edition
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Author (1):
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Ryan "elfmaster" O'Neill Ryan "elfmaster" O'Neill
Author Profile Icon Ryan "elfmaster" O'Neill
Ryan "elfmaster" O'Neill
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Table of Contents (11) Chapters Close

Preface 1. The Linux Environment and Its Tools FREE CHAPTER 2. The ELF Binary Format 3. Linux Process Tracing 4. ELF Virus Technology – Linux/Unix Viruses 5. Linux Binary Protection 6. ELF Binary Forensics in Linux 7. Process Memory Forensics 8. ECFS – Extended Core File Snapshot Technology 9. Linux /proc/kcore Analysis Index

The importance of ptrace


In Linux, the ptrace(2) system call is the userland means of accessing a process address space. This means that someone can attach to a process that they own and modify, analyze, reverse, and debug it. Well-known debugging and analysis applications such as gdb, strace, and ltrace are ptrace assisted applications. The ptrace command is very useful for both reverse engineers and malware authors.

It gives a programmer the ability to attach to a process and modify the memory, which can include injecting code and modifying important data structures such as the Global Offset Table (GOT) for shared library redirection. In this section, we will cover the most commonly used features of ptrace, demonstrate memory infection from the attacker's side, and process analysis by writing a program to reconstruct a process image back into an executable. If you have never used ptrace, then you will see that you have been missing out on a lot of fun!

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