Book Image

Learning Linux Binary Analysis

By : Ryan "elfmaster" O'Neill
5 (1)
Book Image

Learning Linux Binary Analysis

5 (1)
By: Ryan "elfmaster" O'Neill

Overview of this book

Learning Linux Binary Analysis is packed with knowledge and code that will teach you the inner workings of the ELF format, and the methods used by hackers and security analysts for virus analysis, binary patching, software protection and more. This book will start by taking you through UNIX/Linux object utilities, and will move on to teaching you all about the ELF specimen. You will learn about process tracing, and will explore the different types of Linux and UNIX viruses, and how you can make use of ELF Virus Technology to deal with them. The latter half of the book discusses the usage of Kprobe instrumentation for kernel hacking, code patching, and debugging. You will discover how to detect and disinfect kernel-mode rootkits, and move on to analyze static code. Finally, you will be walked through complex userspace memory infection analysis. This book will lead you into territory that is uncharted even by some experts; right into the world of the computer hacker.
Table of Contents (17 chapters)
Learning Linux Binary Analysis
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Index

readecfs


The readecfs utility will be used throughout the rest of this chapter while demonstrating the different ECFS features. Here is a synopsis of the tool from readecfs -h:

Usage: readecfs [-RAPSslphega] <ecfscore>
-a  print all (equiv to -Sslphega)
-s  print symbol table info
-l  print shared library names
-p  print ELF program headers
-S  print ELF section headers
-h  print ELF header
-g  print PLTGOT info
-A  print Auxiliary vector
-P  print personality info
-e  print ecfs specific (auiliary vector, process state, sockets, pipes, fd's, etc.)

-[View raw data from a section]
-R <ecfscore> <section>

-[Copy an ELF section into a file (Similar to objcopy)]
-O <ecfscore> .section <outfile>

-[Extract and decompress /proc/$pid from .procfs.tgz section into directory]
-X <ecfscore> <output_dir>

Examples:
readecfs -e <ecfscore>
readecfs -Ag <ecfscore>
readecfs -R <ecfscore> .stack
readecfs -R <ecfscore> .bss
readecfs -eR ...