Jeff_ITBlog

풀이 rcity13@35e08a7255bf:~$ ls -al total 48 drwxr-xr-x 1 root root 4096 Mar 6 08:04 . drwxr-xr-x 1 root root 4096 Mar 6 08:03 .. -rw-r--r-- 1 root root 220 Jan 6 2022 .bash_logout -rw-r--r-- 1 root root 3817 Mar 6 08:04 .bashrc -rw-r--r-- 1 root root 807 Jan 6 2022 .profile -r-sr-x--- 1 rcity14 rcity13 16448 Mar 6 08:04 rcity13-binary rcity13@35e08a7255bf:~$ file rcity13-binary rcity13-binary: se..

풀이 rcity12@35e08a7255bf:~$ head rcity12-flag1.txt Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed blandit elit quis bibendum consectetur. Sed elementum, libero ut rhoncus auctor, metus purus vestibulum arcu, eu eleifend nunc augue et est. Integer ultricies vel ipsum eu varius. Nunc blandit lacus ac tellus fringilla, a accumsan mi pellentesque. Etiam bibendum varius justo. Quisque a ..

풀이 rcity11@35e08a7255bf:~$ ls -l total 8 -r--r----- 1 root rcity11 1876 Mar 6 08:04 id_rsa.rcity12 -rw-r--r-- 1 root root 1556 Mar 6 08:04 wordlist.txt 우선 ssh 접속한 이후에 파일을 확인한다 문제에서 wordlist.txt 를 다운 받을 수 있지만 id_rsa.rcity12를 이동 시켜야하기 때문에 rcity11이 아닌 호스트에서 진행하기 위하여 scp 를 이용하여 파일을 가져와 준다 ┌──(root㉿kali)-[~/raccoon/rcity/11] └─# scp -P 31338 rcity11@ctf.redraccoon.kr:/home/rcity11/* . rcity11@ctf.red..

풀이 압축파일이 겹겹히 압축되어있는 것으로 추정된다 rcity10@f5532245be95:~$ ls flag.txt rcity10@f5532245be95:~$ mkdir /tmp/20240331 rcity10@f5532245be95:~$ cd /tmp/20240331 rcity10@f5532245be95:/tmp/20240331$ ls rcity10@f5532245be95:/tmp/20240331$ cp /home/rcity10/flag.txt . rcity10@f5532245be95:/tmp/20240331$ ls flag.txt rcity10@f5532245be95:/tmp/20240331$ 7z x flag.txt 7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor..

풀이 rcity9@04d1eb9322c1:~$ ls flag.txt nmap-result.txt rcity9@04d1eb9322c1:~$ cat flag.txt U2FsdGVkX1+leDPhZC2pHbHzQIm53MhRqDVCJb2LcjMP1GDsGRCyOwImPRC8WlYt rcity9@04d1eb9322c1:~$ head nmap-result.txt 21/tcp open FTP Microsoft ftpd v.1.3 22/tcp open ssh OpenSSH 7.9 (protocol 2.0) 23/tcp open telnet Linux telnetd 25/tcp open smtp Postfix smtpd 53/tcp open domain ISC BIND 9.8.2rc1-RedHat-9.8.2-0.62...

풀이 동일하게 로그인 한 후에 cat 명령어로 flag를 확인하면 엄청나게 많은 양의 디코딩된 파일이 있을 것이다 그래서 스크립트로 문자열을 찾아낼 수 있게 while 이나 for 문을 이용하여 스크립트를 짜야한다 #!/bin/bash encode_file=$(cat "/home/rcity8/flag.txt"0 while true; do decode_string=$(echo "$encode_file" | base64 --decode) echo "$decode_string" encode_file=$deocde_string done Vm1wSmQyVkZOVWhTYTJScVVrWndjRlJYTVZOamJGcHlWMnQwVkdKR1JqTlhhMmgzWWtaYWMxTnNXbFpXZWxaUVZtcEtWMk5zWkZ..

풀이 ┌──(root㉿kali)-[~/raccoon/rcity] └─# ssh rcity7@ctf.redraccoon.kr -p 31338 rcity7@ctf.redraccoon.kr's password: rcity7@04d1eb9322c1:~$ ls -l total 0 rcity7@04d1eb9322c1:~$ ss -bash: ss: command not found rcity7@04d1eb9322c1:~$ lsof -bash: lsof: command not found rcity7@04d1eb9322c1:~$ nestat -bash: nestat: command not found rcity7@04d1eb9322c1:~$ nmap localhost Starting Nmap 7.80 ( https://nm..

풀이 ┌──(root㉿kali)-[~/raccoon/rcity] └─# ssh rcity6@ctf.redraccoon.kr -p 31338 rcity6@ctf.redraccoon.kr's password: rcity6@04d1eb9322c1:~$ cat flag @@@@�▒▒▒���� ���-�=�=���-�=�=�888 XXXDDS�td888 P�td\#\#\#

풀이 ┌──(root㉿kali)-[~/raccoon/rcity] └─# ssh rcity5@ctf.redraccoon.kr -p 31338 rcity5@ctf.redraccoon.kr's password: rcity5@04d1eb9322c1:~$ ls flag.txt rcity5@04d1eb9322c1:~$ cat flag.txt flag is base64 encoded string - ZmxhZzogTTJwTjl6UTFzVzN5SDhnUjZkMAo=rcity5@04d1eb9322c1:~$ rcity5@04d1eb9322c1:~$ echo "ZmxhZzogTTJwTjl6UTFzVzN5SDhnUjZkMAo=" | base64 --decode flag: M2pN9zQ1sW3yH8gR6d0 base64 명령어..

풀이 ┌──(root㉿kali)-[~/raccoon/rcity] └─# ssh rcity4@ctf.redraccoon.kr -p 31338 rcity4@ctf.redraccoon.kr's password: rcity4@04d1eb9322c1:~$ cat flag.txt | grep -riw "flag" flag.txt:syncope Nucula vicissitous Minos orrhology gustation multicarinate flag deuterogelatose pachycephalia derivational flag.txt:millrace za Spartacist flag here euhemerist Araby sphacelus licorn nonconstruable flag.txt:Amii..