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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

Chapter 3. Linux Process Tracing

In the last chapter, we covered the internals of the ELF format and explained its internal workings. In Linux and other Unix-flavored OSes that use ELF, the ptrace system call goes hand in glove with analyzing, debugging, reverse engineering, and modifying programs that use the ELF format. The ptrace system call is used to attach to a process and access the entire range of code, data, stack, heap, and registers.

Since an ELF program is completely mapped in a process address space, you can attach to the process and parse or modify the ELF image very similarly to how you would do this with the actual ELF file on disk. The primary difference is that we use ptrace to access the program instead of using the open/mmap/read/write calls that would be used for the ELF file.

With ptrace, we can have full control over a program's execution flow, which means that we can do some very interesting things, ranging from memory virus infection and virus analysis...

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