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0x01_arm_32_hacking_hello_world

ARM 32-bit Raspberry Pi Hacking Hello World example in Kali Linux.

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Schematic

Parts

Raspberry Pi 4
64GB Micro SD Card
Micro SD Card Reader/Writer

STEP 1: Download Kali Linux ARM Image - Raspberry Pi 32-bit

Download [https://www.offensive-security.com/kali-linux-arm-images/]

STEP 2: Download balenaEtcher

Download

STEP 3: Flash Kali Linux ARM Image

Watch YT Null Byte Video

STEP 4: Power Up RPI & Login

POWER UP DEVICE AND LOGIN AS KALI AND SET UP SSH

STEP 5: Create File In VIM

.global _start

_start:

print_hello_world:
    mov R0, #1                      @ 1 = stdout
    ldr R1, =hello_world            @ str pointer
    mov R2, #13                     @ str len
    mov R7, #4                      @ linux write syscall
    svc 0                           @ software interrupt call write

exit:
    mov R0, #0                      @ return code
    mov R7, #1                      @ linux exit syscall
    svc 0                           @ software interrupt call exit

.data
hello_world:                        .ascii "Hello World!\n"

STEP 6: Save File As - 0x01_arm_32_hacking_hello_world.s [:wq]

STEP 7: Build & Link

as -o 0x01_arm_32_hacking_hello_world.o 0x01_arm_32_hacking_hello_world.s
ld -o 0x01_arm_32_hacking_hello_world 0x01_arm_32_hacking_hello_world.o

STEP 8: Run Binary

./0x01_arm_32_hacking_hello_world
Hello World!

STEP 9: Run Radare2 - Debug Mode

r2 -d ./0x01_arm_32_hacking_hello_world

STEP 10: Run Radare2 - Debug Step 1 [Examine Binary @ Entry Point]

aaa
s entry0
vv

STEP 11: Run Radare2 - Debug Step 2 [Examine str]

q
[0x00010074]> pf S @0x00010094
0x00010094 = 0x00010094 -> 0x00020098 "Hello World!
A�"

STEP 12: Run Radare2 - Debug Step 3 [Hack str]

w Hacked World\n @0x00020098

STEP 13: Run Radare2 - Debug Step 4 [Review Hack]

[0x00010074]> pf S @0x00010094
0x00010094 = 0x00010094 -> 0x00020098 "Hacked World
A�"

STEP 14: Run Radare2 - Debug Step 5 [Hack Binary Permanently]

q
r2 -w ./0x01_arm_32_hacking_hello_world
[0x00010074]> w Hacked World\n @0x00020098
[0x00010074]> q

STEP 15: Prove Hack

./0x01_arm_32_hacking_hello_world
Hacked World

License

Apache License, Version 2.0