Binary Challenges | Varnesh Gawde

Challenge #1: Binary Analysis

                        48 89 e5    mov    rbp, rsp
                        48 83 ec 10 sub    rsp, 0x10
                        c7 45 fc    mov    DWORD PTR [rbp-0x4], 0x1
                        8b 45 fc    mov    eax, DWORD PTR [rbp-0x4]
                        83 c0 01    add    eax, 0x1
                    

What is the value of eax after these instructions execute?

A) 0x0

B) 0x1

C) 0x2

D) 0x10

Challenge #2: Stack Operations

                        push   rbp
                        mov    rbp, rsp
                        push   0x1337
                        pop    rax
                        xor    rax, 0x42
                    

What is the final value in RAX?

A) 0x1337

B) 0x1375

C) 0x0

D) 0x42

Challenge #3: Control Flow

                        xor    eax, eax
                        test   eax, eax
                        jz     loc_1337
                        mov    eax, 0x1
                        loc_1337:
                        inc    eax
                    

What will be the value of EAX after execution?

A) 0x0

B) 0x1

C) 0x2

D) 0x1337