EasyCTF_2018: Adder

Category: Reverse Engineering Points: 80 Description:

This program adds numbers. Find the flag! adder

Write-up

This challenge is really simple, just load up the decompiler,

│           0x00400b9c      01d0           add eax, edx
│           0x00400b9e      3d39050000     cmp eax, 0x539              ; 1337
│       ┌─< 0x00400ba3      7527           jne 0x400bcc

Add 3 numbers!

# ./adder 
Enter three numbers!
0
1000
337
easyctf{y0u_added_thr33_nums!}

Therefore, the flag is easyctf{y0u_added_thr33_nums!}.

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