Linux Function Hooking
Task 1 Introduction
#1 :- I am ready to learn!
Answer :- No Needed Answer
Task 2 What are Shared Libraries?
#2 :- What is the name of the dynamic linker/loader on linux?
Answer :- ld.so, ld-linux.so*
Task 3 Getting A Tad Bit Technical
#3.1:- What environment variable let's you load your own shared library before all others?
Answer :- LD_PRELOAD
#3.2:- Which file contains a whitespace-separated list of ELF shared objects to be loaded before running a program?
Answer :- /etc/ld.so.preload
#3.3:- If both the environment variable and the the file are employed, the libraries specified by which would be loaded first?
Answer :- environment variable
Task 4 Putting On Our Coding Hats
#4.1 :- How many arguments does write() take?
Answer :- 3
#4.2 :- Which feature test macro must be defined in order to obtain the definitions of RTLD_NEXT from <dlfcn.h>?
Answer :- _GNU_SOURCE
Task 5 Let’s Gooooooooo
#5.1 :- When compiling our code to produce a Shared Object, which flag is used to create position independent code?
Answer :- -fPIC
#5.2 :- Can hooking libc functions affect the behavior of Python3? (Yay/Nay)
Answer :- yay
Task 6 Hiding Files From ls
#6.1 :- There are two mandatory fields of a dirent structure. One is d_name, and the other one is?
Answer :- d_ino
#6.2 :- I have read and understood how I can hide files using shared objects!
Answer :- No Needed Answer
Task 7 Conclusion
#7 :- Hooray! You made it to the end!
Answer :- No Needed Answer
