Book Image

Windows APT Warfare

By : Sheng-Hao Ma
5 (2)
Book Image

Windows APT Warfare

5 (2)
By: Sheng-Hao Ma

Overview of this book

An Advanced Persistent Threat (APT) is a severe form of cyberattack that lies low in the system for a prolonged time and locates and then exploits sensitive information. Preventing APTs requires a strong foundation of basic security techniques combined with effective security monitoring. This book will help you gain a red team perspective on exploiting system design and master techniques to prevent APT attacks. Once you’ve understood the internal design of operating systems, you’ll be ready to get hands-on with red team attacks and, further, learn how to create and compile C source code into an EXE program file. Throughout this book, you’ll explore the inner workings of how Windows systems run and how attackers abuse this knowledge to bypass antivirus products and protection. As you advance, you’ll cover practical examples of malware and online game hacking, such as EXE infection, shellcode development, software packers, UAC bypass, path parser vulnerabilities, and digital signature forgery, gaining expertise in keeping your system safe from this kind of malware. By the end of this book, you’ll be well equipped to implement the red team techniques that you've learned on a victim's computer environment, attempting to bypass security and antivirus products, to test its defense against Windows APT attacks.
Table of Contents (17 chapters)
1
Part 1 – Modern Windows Compiler
5
Part 2 – Windows Process Internals
9
Part 3 – Abuse System Design and Red Team Tips

RAiLaunchAdminProcess callback

In the previous section, we mentioned a very important point: when anyone tries to create a privilege elevation process from a low-privilege program, the UAC privilege service will be notified and will confirm whether to delegate privileges or not. If the elevation request is granted, the UAC privilege service will then proceed to hatch the low-privilege program with high privileges.

At this point, the UAC privilege service must have a callback function that is responsible for receiving requests, validating them, and delegating the privileges while generating the process. This callback function is the RAiLaunchAdminProcess function located in appinfo.dll.

Figure 10.5 shows a screenshot of the dynamic analysis of the UAC privilege service by the well-known binary decompiler IDA and the dynamic debugging of its RAiLaunchAdminProcess callback function breakpoints. We will now explain this entirely in terms of IDA-generated pseudocode and dynamic debugging...