Reverse engineering has been around for years and has been a useful technique to understand how things work. In the software industry, reverse engineering helps validate and fix code flow and structures. The information from such tasks can improve the security of various aspects of software, network infrastructure, and human awareness. As a core skill requirement for the anti-malware industry, reverse engineering helps create detection and remediation information; the same information that is used to build safeguards for an institution's servers. It is also used by authorities and forensic experts to hunt down syndicates.

There are basic steps that help build reverse engineering information. Once an analyst has approval from the original author to carry out reverse engineering, they can begin with static analysis, dynamic analysis, and then low-level analysis. This is then followed by reporting the overview and details about the software.

When doing analysis, various types of tools are used, including static analysis tools, disassemblers, decompilers, debuggers, and system monitoring tools. When doing reverse engineering on malware, it is best to use these tools in an environment that has limited or no access to the network you use for personal purposes or work. This should prevent your infrastructure from being compromised. Malware should be handled properly, and we listed a couple of ways to prevent accidental double-clicks.

Malware analysis nonetheless requires the internet to get further information on how the malware works and what it does. There may be some legal issues that require you to consult the laws of your country and the policies of your local ISP, to ensure that you are not violating any of them.

The core requirement for the setup of an analysis lab is that the target operating system can be reverted back to its unmodified state.

Malware samples can be obtained from the following link: https://github.com/PacktPublishing/Mastering-Reverse-Engineering/tree/master/tools. These samples will be used throughout this book.

Now that we have our basic setup, let's embark on our journey through reverse engineering.