Phase 1: Initial Access & AV Evasion

Your first hurdle is getting a payload to execute without getting nuked by Windows Defender. Standard Metasploit payloads will be flagged instantly. You must craft custom droppers.

• Phishing & Client-Side Attacks: The exam often starts with an assumed breach or a phishing scenario. You must be comfortable weaponizing Microsoft Office macros (VBA) or leveraging Windows Script Host (JScript/VBScript) to execute shellcode in memory.
• AMSI Bypass: Before running post-exploitation frameworks or PowerShell scripts, you must patch AMSI in memory. Relying on public, un-obfuscated bypass strings will lead to immediate failure.
• Process Injection: Learn to implement process hollowing or shellcode injection using C# (P/Invoke) to migrate your payload into a legitimate process like explorer.exe or svchost.exe to maintain a stealthy foothold.

Phase 2: Lateral Movement & AppLocker Bypass

Once inside, the network gets tighter. You will encounter strict Application Whitelisting (AppLocker) policies that prevent unauthorized executables from running.

To move laterally, you have to "live off the land" (LOLBins). Instead of dropping custom binaries, you must abuse trusted Microsoft utilities. Bypassing AppLocker often involves utilizing InstallUtil.exe, MSBuild.exe, or Regasm.exe to compile and execute malicious C# assemblies on the fly.

Furthermore, your network pivots must be rock solid. You will routinely need to route traffic through multiple compromised hosts using tools like Chisel, Ligolo-ng, or native SSH port forwarding to reach internal Active Directory domain controllers.

Phase 3: Cracking Complex Labs (The DeHospital Scenario)

The OSEP exam network consists of interlocking systems that require complex exploit chains. Many candidates struggle with specific, highly-secured internal architectures.

For example, scenarios similar to the notorious osep exam dehospital lab require you to seamlessly chain web application vulnerabilities (like deserialization or SQL injection) with local privilege escalation, all while maintaining an undetected reverse shell. Navigating these specific environments blindly wastes precious exam hours. This is where studying professional OSEP writeups and detailed lab solutions becomes invaluable. Understanding the logical flow of these complex architectures allows you to spot misconfigurations faster on exam day.

Phase 4: Active Directory Exploitation & MSSQL

The heart of the PEN-300 curriculum is advanced Active Directory and database exploitation. You aren't just looking for weak passwords; you are manipulating trust boundaries.

• Cross-Forest Trusts: You must know how to forge Golden Tickets and hop across domain trusts to compromise entirely separate Active Directory forests.
• MSSQL Database Links: A major component of the exam involves enumerating linked SQL servers. You will need to execute queries via xp_cmdshell or utilize custom assemblies across linked databases to achieve remote code execution on backend servers.