You're reading from Windows APT Warfare

Product typeBook

Published inMar 2023

Reading LevelIntermediate

PublisherPackt

ISBN-139781804618110

Edition1st Edition

Languages

C++

Tools

MiniGW

Concepts

Cybersecurity

Author (1)

Sheng-Hao Ma

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...

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Windows APT Warfare

Published in: Mar 2023Publisher: PacktISBN-13: 9781804618110

Author (1)

Sheng-Hao Ma

Sheng-Hao Ma is currently working as a threat researcher at TXOne Networks, specializing in Windows reverse engineering analysis for over 10 years. In addition, he is currently a member of CHROOT, an information security community in Taiwan. He has served as a speaker and instructor for various international conferences and organizations such as Black Hat USA, DEFCON, CODE BLUE, HITB, VXCON, HITCON, ROOTCON, Ministry of National Defense, and Ministry of Education.
Read more about Sheng-Hao Ma

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