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Curriculum lobby
0s75 min Loop75 min★ 150 XP
Syllabus

Operating System Security

Operating System Security FundamentalsCommon OS Security Concepts (Trusted Computing Base, Security Kernel)OS Attack Surface Overview (Services, Ports, Processes, Registry/FS)Secure Installation & Baseline Configuration
User Account & Privilege ManagementPrinciple of Least Privilege (PoLP) in PracticeWindows User Accounts (Administrator vs. Standard User, UAC)Linux User Accounts (root vs. Regular User, sudo Mechanics)macOS User Accounts (Admin vs. Standard, Privacy Preferences)Group Policies & Role-Based Access Control (RBAC)
File System Permissions & Access ControlWindows NTFS Permissions (Full Control, Modify, Read & Execute)Linux/macOS POSIX Permissions (chmod, chown, umask, SUID/SGID/Sticky Bit)Access Control Lists (ACLs) – Windows icacls & Linux setfacl/getfaclShared Folder & Network Drive SecurityFile Integrity Monitoring (AIDE, Tripwire, Windows SFC)
Windows HardeningLocal Security Policy & Security Configuration WizardWindows Defender Firewall & Advanced Security RulesBitLocker Drive Encryption & TPM UsageDisabling Unnecessary Services (Print Spooler, SMBv1, RDP lockdown)Windows 10/11 Security Baselines & Microsoft Defender for EndpointWindows Registry Hardening (LSA, UAC, AutoRun)
Linux HardeningSecuring GRUB Bootloader & Single-User ModeSSH Hardening (Disable root login, key-only auth, fail2ban)AppArmor & SELinux (Enforcing/Targeted/Disabled modes)Unnecessary Package Removal & Service Disabling (systemd)iptables/nftables & TCP Wrappers/etc/security/limits.conf & PAM Configuration
macOS HardeningSystem Integrity Protection (SIP) & GatekeeperFileVault Full-Disk Encryption & Firmware PasswordmacOS Built-in Firewall & Application Firewall (pf)Privacy Settings (Camera, Microphone, Location, Accessibility)MDM Configuration Profiles & Security ConfiguratorXProtect, MRT, & Notarization
Patch Management & Update LifecycleVulnerability Lifecycle & Zero-Day RiskWindows Update (WSUS, Windows Update for Business)Linux Patch Management (apt, yum/dnf, zypper, unattended-upgrades)macOS Software Update & Nudge FrameworkThird-Party Patching (Chocolatey, Patch My PC, Munki)Testing Patches & Rollback Strategies
OS Hardening Automation & ComplianceCIS Benchmarks & DISA STIGs OverviewAutomated Hardening Scripts (PowerShell DSC, Ansible, Bash)OpenSCAP, Lynis, & Osquery for Compliance ScanningContinuous Hardening with Infrastructure as Code (IaC)
Real-World OS Attacks & DefensesWindows Privilege Escalation (Potato Attacks, PrintNightmare)Linux Privilege Escalation (Sudo Bypass, SUID Binaries, Dirty Pipe)macOS TCC Database Bypass & Persistence TechniquesDefensive Logging & Monitoring (Sysmon, Auditd, Unified Logging)
Capstone LabHarden a Windows 10 VM Against CIS Level 1Harden an Ubuntu 22.04 Server Using Lynis & SELinuxPatch Management Simulation (Identifying & Deploying Critical Patches)Post-Hardening Vulnerability Scan (Nessus/OpenVAS Comparison)
operating-system-security / local-security-policy-scw

Local Security Policy & Security Configuration Wizard

#One Misconfigured Audit Policy Can Hide an Entire Attack#link

The Local Security Policy (secpol.msc) and Security Configuration Wizard (SCW) are the Swiss army knives of Windows hardening. Yet many admins either ignore them or blindly apply templates without understanding the implications. This lesson teaches you to craft a security policy that aligns with your server's role—web server, database, or domain controller—while avoiding common pitfalls like disabling necessary services or creating blind spots in audit logs.

User Rights Assignment: The Backbone of Security Policy

User Rights Assignments control who can log on locally, shut down the system, debug programs, and dozens of other sensitive actions. The default 'Access this computer from the network' includes Everyone; you should restrict it to 'Authenticated Users' or specific groups. 'Debug programs' (SeDebugPrivilege) is a critical right—attackers use it to inject into lsass.exe. Remove it from all non-admin accounts. Always configure these via Group Policy for consistency.

Export current security policy template
root@vulnarex:~#secedit /export /cfg C:\SecurityBaseline.inf

The exported INF file contains every local policy setting. You can diff it against a CIS benchmark template to identify deviations.

powershell
# List user rights assignments using PowerShell
Get-Policy -Type "User Rights" | Format-Table Identity, Access, NTAccount

Security Configuration Wizard: Role-Based Hardening

SCW (scw.exe) is a role-based tool that analyzes a server's functions, services, and network ports, then produces an XML security policy that disables unnecessary services, configures firewall rules, and sets audit policies. It's far more granular than a blanket GPO. After running SCW, review the generated policy carefully—it might disable a service needed by a third-party app. The resulting XML can be applied with scwcmd configure.

info

💡 SCW is not installed by default on newer Windows Server versions; add it via Server Manager or dism. It's still a powerful one-time hardening tool for standalone servers.

Security Policy AreaKey SettingRecommended Value
Account PoliciesPassword history24 passwords remembered
Local PoliciesAudit object accessSuccess, Failure
User RightsDeny log on through Remote DesktopLocal account
Security OptionsNetwork security: LAN Manager authentication levelSend NTLMv2 response only. Refuse LM & NTLM

Audit Policy: Logging What Matters

A common mistake is enabling 'Success' audit for everything and flooding the security log. Use SCW or GPO to set a targeted audit policy: Audit Logon Events (Success, Failure), Account Management, Privilege Use, and Object Access only on sensitive folders. On domain controllers, also enable Directory Service Access. Test the log volume and adjust with auditpol.exe before pushing to production.

  • ▪Export and review the current security policy with secedit before making changes.
  • ▪Run SCW for each server role; don't apply the same policy to a web server and a DC.
  • ▪Restrict SeDebugPrivilege to Administrators only—remove even from 'Power Users'.
  • ▪Configure audit policy to capture account logons, privilege use, and policy changes.
STRICT SECURE AUDIT RULE

⚠️ Changing User Rights Assignments on a domain controller can break domain replication if not carefully tested. Always test in a staging environment.

quiz BLOCK (★ 50 XP)

You need to allow the IT team to shut down a server remotely but prevent them from logging on interactively. Which policy setting achieves this?

Select your proof vectors above
challenge BLOCK (★ 100 XP)

SCW Policy Creation

Select your proof vectors above

Verification Proof Checkpoint

Verify exercises to earn ★ 150 XP and unlock next lab level.

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Checkpoints
One Misconfigured Audit Policy Can Hide an Entire Attack
Laboratory Sanity Code

Isolate active probes on matched virtual networks. Keep execution streams fully sandboxed.