ARMssembly 3

Problem

What integer does this program print with argument 2541039191? File: chall_3.S Flag format: picoCTF{XXXXXXXX} -> (hex, lowercase, no 0x, and 32 bits. ex. 5614267 would be picoCTF{0055aabb})

• Source

Solution

1. This challenge can be solved using the exact same method as ARMssembly 0.

2. Note that the output was Result: 57. Converting this to hexadecimal produces 39. However, the instructions say that the flag is 32 bits, so we can simply pad out the hexadecimal to 00000039.

Flag

picoCTF{00000039}