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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

image

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

image

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

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

Apache License, Version 2.0


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