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

Getting started with ECFS


At the time of writing this chapter, the complete ECFS project and source code is available at http://github.com/elfmaster/ecfs. Once you have cloned the repository with git, you should compile and install the software as described in the README file.

Currently, ECFS has two modes of use:

  • Plugging ECFS into the core handler

  • ECFS snapshots without killing the process

Note

In this chapter, the terms ECFS files, ECFS snapshots, and ECFS core files are used interchangeably.

Plugging ECFS into the core handler

The first thing is to plug the ECFS core handler into the Linux kernel. The make install will accomplish this for you, but it must be done after every reboot or stored in an init script. The manual way of setting up the ECFS core handler is by modifying the /proc/sys/kernel/core_pattern file.

This is the command used to activate the ECFS core handler:

echo '|/opt/ecfs/bin/ecfs_handler -t -e %e -p %p -o \ /opt/ecfs/cores/%e.%p' > /proc/sys/kernel/core_pattern

Note

Notice...