TECHNIQUES LEARNED FROM THE XZ BACKDOOR

Summary from the TLDR InfoSec newsletter

This blog post discusses techniques used in the XZ backdoor, focusing on locating function addresses, symbol tables, and system information within ELF files. It also explains the process of function hooking and demonstrates a simplified version of the XZ backdoor's logic using library functions and memory address manipulation. The XZ backdoor's method involves finding specific addresses and performing actions based on that information, simulating the process of locating critical functions within programs.