hardening-windows-endpoint-with-cis-benchmark

Hardens Windows endpoints using CIS (Center for Internet Security) Benchmark recommendations to reduce attack surface, enforce security baselines, and meet compliance requirements. Use when deploying new Windows workstations or servers, remediating audit findings, or establishing organization-wide security baselines. Activates for requests involving Windows hardening, CIS benchmarks, GPO security baselines, or endpoint configuration compliance.

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Repository: autohandai/community-skills
Last source activity: March 16, 2026 at 00:59
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name	hardening-windows-endpoint-with-cis-benchmark
description	Hardens Windows endpoints using CIS (Center for Internet Security) Benchmark recommendations to reduce attack surface, enforce security baselines, and meet compliance requirements. Use when deploying new Windows workstations or servers, remediating audit findings, or establishing organization-wide security baselines. Activates for requests involving Windows hardening, CIS benchmarks, GPO security baselines, or endpoint configuration compliance.
domain	cybersecurity
subdomain	endpoint-security
tags	["endpoint","hardening","windows-security","CIS-benchmark","GPO","baseline-configuration"]
version	1.0.0
author	mahipal
license	Apache-2.0

Hardening Windows Endpoint with CIS Benchmark

When to Use

Use this skill when:

Deploying new Windows 10/11 or Server 2019/2022 endpoints that require security hardening
Establishing organization-wide security baselines using CIS Level 1 or Level 2 profiles
Remediating findings from compliance audits (PCI DSS, HIPAA, SOC 2) that reference CIS benchmarks
Validating existing endpoint configurations against current CIS benchmark versions

Do not use this skill for Linux endpoints (use hardening-linux-endpoint-with-cis-benchmark) or for cloud-native workloads that require CIS cloud benchmarks.

Prerequisites

Windows 10/11 Enterprise or Windows Server 2019/2022 target endpoints
Active Directory Group Policy Management Console (GPMC) for enterprise deployment
CIS-CAT Pro Assessor or CIS-CAT Lite for automated benchmark assessment
Administrative access to target endpoints or domain controller
Current CIS Benchmark PDF for the target Windows version (download from cisecurity.org)

Workflow

Step 1: Select CIS Benchmark Profile Level

CIS provides two profile levels for Windows endpoints:

Level 1 (L1) - Corporate/Enterprise Environment:

Practical hardening settings that can be applied to most organizations
Minimal impact on functionality and user experience
Covers: password policy, audit policy, user rights, security options, Windows Firewall

Level 2 (L2) - High Security/Sensitive Data:

Includes all L1 settings plus additional restrictions
May impact usability (disabling autorun, restricting remote desktop, enhanced audit logging)
Appropriate for systems handling PII, PHI, PCI data, or classified information

Select profile based on data classification and risk tolerance of the endpoint.

Step 2: Import CIS GPO Baselines

CIS provides pre-built GPO templates (Build Kits) for each benchmark version:

# Download CIS Build Kit from CIS WorkBench (requires CIS SecureSuite membership)
# Extract the GPO backup to a staging directory

# Import the CIS GPO into Active Directory
Import-GPO -BackupGpoName "CIS Microsoft Windows 11 Enterprise v3.0.0 L1" `
  -TargetName "CIS-Win11-L1-Baseline" `
  -Path "C:\CIS-GPO-Backups\Win11-Enterprise" `
  -CreateIfNeeded

# Link GPO to target OU
New-GPLink -Name "CIS-Win11-L1-Baseline" `
  -Target "OU=Workstations,DC=corp,DC=example,DC=com" `
  -LinkEnabled Yes

Step 3: Apply Key CIS Benchmark Categories

Password Policy:
  - Minimum password length: 14 characters (1.1.4)
  - Maximum password age: 365 days (1.1.3)
  - Password complexity: Enabled (1.1.5)
  - Store passwords using reversible encryption: Disabled (1.1.6)

Account Lockout Policy:
  - Account lockout threshold: 5 invalid logon attempts (1.2.1)
  - Account lockout duration: 15 minutes (1.2.2)
  - Reset account lockout counter after: 15 minutes (1.2.3)

Audit Policy Configuration:
  - Audit Credential Validation: Success and Failure (17.1.1)
  - Audit Security Group Management: Success (17.2.5)
  - Audit Logon: Success and Failure (17.5.1)
  - Audit Process Creation: Success (17.6.1)
  - Audit Removable Storage: Success and Failure (17.6.4)

  - Interactive logon: Do not display last user name: Enabled (2.3.7.1)
  - Interactive logon: Machine inactivity limit: 900 seconds (2.3.7.3)
  - Network access: Do not allow anonymous enumeration of SAM accounts: Enabled (2.3.10.2)
  - Network security: LAN Manager authentication level: Send NTLMv2 response only (2.3.11.7)
  - UAC: Run all administrators in Admin Approval Mode: Enabled (2.3.17.6)

  - Domain Profile: Firewall state: On (9.1.1)
  - Domain Profile: Inbound connections: Block (9.1.2)
  - Private Profile: Firewall state: On (9.2.1)
  - Public Profile: Firewall state: On (9.3.1)
  - Public Profile: Inbound connections: Block (9.3.2)

# Run CIS-CAT Pro Assessor against target endpoint
# CIS-CAT produces an HTML/XML report with pass/fail per recommendation

.\Assessor-CLI.bat `
  -b "benchmarks\CIS_Microsoft_Windows_11_Enterprise_Benchmark_v3.0.0-xccdf.xml" `
  -p "Level 1 (L1) - Corporate/Enterprise Environment" `
  -rd "C:\CIS-Reports" `
  -nts

# Review report for failed controls
# Score target: 95%+ for L1, 90%+ for L2 (due to operational exceptions)

Recommendation: 2.3.7.3 - Interactive logon: Machine inactivity limit: 900 seconds
Exception: Kiosk systems in manufacturing floor require 1800 seconds
Compensating Control: Physical badge-access to manufacturing area, CCTV monitoring
Review Date: 2026-06-01
Approved By: CISO

# Create scheduled task for weekly CIS-CAT assessment
$action = New-ScheduledTaskAction -Execute "C:\CIS-CAT\Assessor-CLI.bat" `
  -Argument "-b benchmarks\CIS_Win11_v3.0.0-xccdf.xml -p Level1 -rd C:\CIS-Reports -nts"
$trigger = New-ScheduledTaskTrigger -Weekly -DaysOfWeek Sunday -At 2am
$principal = New-ScheduledTaskPrincipal -UserId "SYSTEM" -RunLevel Highest
Register-ScheduledTask -TaskName "CIS-Benchmark-Scan" -Action $action `
  -Trigger $trigger -Principal $principal

Term	Definition
CIS Benchmark	Consensus-based security configuration guide developed by CIS with input from government, industry, and academia
Level 1 Profile	Practical security baseline suitable for most organizations with minimal operational impact
Level 2 Profile	Extended security baseline for high-security environments that may reduce functionality
CIS-CAT	CIS Configuration Assessment Tool that automates benchmark compliance checking
Build Kit	Pre-configured GPO templates provided by CIS that implement benchmark recommendations
Scoring	CIS recommendations are either Scored (compliance-measurable) or Not Scored (best-practice guidance)