Writeup of HTB Machine called “Jeeves”
Enum
I started with the nmap scan:
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$ nmap -sS -A -T4 -p- 10.10.10.63
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-07-08 12:03 CEST
Nmap scan report for 10.10.10.63
Host is up (0.31s latency).
Not shown: 65531 filtered tcp ports (no-response)
PORT STATE SERVICE VERSION
80/tcp open http Microsoft IIS httpd 10.0
|_http-server-header: Microsoft-IIS/10.0
|_http-title: Ask Jeeves
| http-methods:
|_ Potentially risky methods: TRACE
135/tcp open msrpc Microsoft Windows RPC
445/tcp open microsoft-ds Microsoft Windows 7 - 10 microsoft-ds (workgroup: WORKGROUP)
50000/tcp open http Jetty 9.4.z-SNAPSHOT
|_http-server-header: Jetty(9.4.z-SNAPSHOT)
|_http-title: Error 404 Not Found
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running (JUST GUESSING): Microsoft Windows 2008 (86%)
OS CPE: cpe:/o:microsoft:windows_server_2008:r2
Aggressive OS guesses: Microsoft Windows Server 2008 R2 (86%)
No exact OS matches for host (test conditions non-ideal).
Network Distance: 2 hops
Service Info: Host: JEEVES; OS: Windows; CPE: cpe:/o:microsoft:windows
Host script results:
| smb-security-mode:
| authentication_level: user
| challenge_response: supported
|_ message_signing: disabled (dangerous, but default)
| smb2-security-mode:
| 3:1:1:
|_ Message signing enabled but not required
| smb2-time:
| date: 2024-07-08T15:05:32
|_ start_date: 2024-07-08T15:03:20
|_clock-skew: mean: 4h59m59s, deviation: 0s, median: 4h59m59s
TRACEROUTE (using port 445/tcp)
HOP RTT ADDRESS
1 479.87 ms 10.10.14.1
2 480.67 ms 10.10.10.63
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 143.80 seconds
The http page on port 80 is just a fake askJeeves page and there’s nothing to be found, even after dirbusting.
The next thing I checked was the 50000 port. The initial page looks like this:
When I saw this, I immediately started dirbusting.
The /askjeeves turned out to be a Jenkins page left without anything to stop me from using Groovy console whatsoever. So, I used that to get my foothold
The script that I used, was taken from this awesome site.
I recently found cool shell handler called penelope.py and I think it’s really useful especially with linux shells since it automatically upgrades them to fully interactive ones!
Script worked and I got my shell!
PrivEsc
Quick enumeration led me to finding privilege “SeImpersonatePrivilege” set to enabled.
Right away, I thought of potato attack, so I quickly migrated to metasploit.
I used the module called exploit/local/ms16_075_reflection_juicy and got the NT AUTHORITY\SYSTEM shell!
Unfortunately it’s not the end of this box, finding the root flag was challenging as well. To find the flag I had to use Alternate Data Streams, since the root.txt on Administrator’s Desktop was fake.
To find the real flag you have to use command dir /R in the Administrator’s Desktop, from there you can type it out using
more < 'full file's path from dir /R'
And that’s all, thank you for reading!