Rating: 5.0
This is an ELF requiring guessing the correct hero out of 20 heros for 50 times. Since it uses the c random with current time as the seed, we can set the seed and predict the exact random number generated and thus the hero.
```python=
from pwn import *
import time
from ctypes import CDLL
from ctypes.util import find_library
libc = CDLL(find_library("c"))
# Set up pwntools for the correct architecture
exe = './mr_unlucky'
# This will automatically get context arch, bits, os etc
elf = context.binary = ELF(exe, checksec=False)
# Change logging level to help with debugging (error/warning/info/debug)
context.log_level = 'debug'
context.terminal = "cmd.exe /c start wsl".split()
heroes = [
"Anti-Mage",
"Axe",
"Bane",
"Bloodseeker",
"Crystal Maiden",
"Drow Ranger",
"Earthshaker",
"Juggernaut",
"Mirana",
"Morphling",
"Phantom Assassin",
"Pudge",
"Shadow Fiend",
"Sniper",
"Storm Spirit",
"Sven",
"Tiny",
"Vengeful Spirit",
"Windranger",
"Zeus",
]
io = remote('52.59.124.14', 5021)
io.recvuntil(b'me guess the names?')
libc.srand(int(time.time()))
for _ in range(50):
name = heroes[libc.rand() % 20]
io.sendlineafter(b'!!!): ', name.encode())
print(io.recvall())
io.close()
```
