Easy CTF 2018

Giải qua lâu rồi mà giờ mới có thời gian đăng một số bài dễ trong các bài dễ.
1. The Oldest Trick in the Book 10 points
miagkbn{e3tk0u3_70_345gk7n_4n5586} ROT18 => easyctf{w3lc0m3_70_345yc7f_4f5586}
2. Intro: Web 10 points
Mở source code ra thấy ngay

 

easyctf{hidden_from_the_masses_1f1196}

3. Soupreme Encoder 20 points

>>’68657869745f6d6174655f6264383563633931313362333033356466633434′.decode(‘hex’)

>>’hexit_mate_bd85cc9113b3035dfc44′

easyctf{ hexit_mate_bd85cc9113b3035dfc44}

4. Intro: Netcat 20 points

$ nc c1.easyctf.com 12481

enter your player key: 900062576

thanks! here’s your key: easyctf{hello_there!_D6365DA0EC8cF9E6}

5. Look At Flag 30 points

6. Haystack 30 points

Ctr+F : “easyctf” => easyctf{PraTBqbjTeXszjeAQDiexoCCg}

7. hexedit 50 points

Ctr+F : “easyctf” => easyctf{cc9990fc}

8. Substitute 50 points

https://quipqiup.com/ => HERE: EASYCTF{THIS_IS_AN_EASY_FLAG_TO_GUESS}

9. xor 50 points

s = ‘\XJ@ZM_B@NJLO^UAXI\Q\QRCUJJVHRZJMD’

for i in range(0, 256):

    flag = ”

    for x in s:

         flag += chr(ord(x)^i)

    print flag

EASYCTF{YWSUVGLXAPEHEHKZLSSOQKCST}
10. Intro: Linux 10 points
$ cat .flag

easyctf{i_know_how_2_find_hidden_files!}