Anti-Cheat Systems & Analysis

Overview

This skill covers anti-cheat systems used in games, their detection mechanisms, and research techniques. Understanding anti-cheat helps both defenders (game developers) and security researchers.

Major Anti-Cheat Systems

Easy Anti-Cheat (EAC)

• Kernel-mode driver protection

• Process integrity verification

• Memory scanning

• Used by: Fortnite, Apex Legends, Rust

BattlEye

• Kernel driver with ring-0 access

• Screenshot capture capability

• Network traffic analysis

• Used by: PUBG, Rainbow Six Siege, DayZ

Vanguard (Riot Games)

• Always-on kernel driver

• Boot-time initialization

• Hypervisor detection

• Used by: Valorant, League of Legends

Valve Anti-Cheat (VAC)

• User-mode detection

• Signature-based scanning

• Delayed ban waves

• Used by: CS2, Dota 2, TF2

Other Systems

• PunkBuster: Legacy FPS anti-cheat

• FairFight: Server-side statistical analysis

• nProtect GameGuard: Korean anti-cheat solution

• XIGNCODE3: Mobile game protection

• ACE (Tencent): Chinese market protection

Detection Mechanisms

Memory Detection

• Signature scanning for known cheats
• Code integrity verification
• Injected module detection
• Memory modification monitoring

Process Detection

• Handle enumeration
• Thread context inspection
• Debug register monitoring
• Stack trace analysis

Kernel-Level Detection

• Driver verification
• Callback registration monitoring
• System call hooking detection
• PatchGuard integration

Behavioral Analysis

• Input pattern analysis
• Movement anomaly detection
• Statistical improbability flagging
• Network packet inspection

Anti-Cheat Architecture

User-Mode Components

• Process scanner

• Module verifier

• Overlay detector

• Screenshot capture

Kernel-Mode Components

• Driver loader

• Memory protection

• System callback registration

• Hypervisor detection

Server-Side Components

• Statistical analysis

• Replay verification

• Report processing

• Ban management

Research Techniques

Static Analysis

• Dump and analyze AC drivers

• Reverse engineer detection routines

• Identify signature patterns

• Map callback registrations

Dynamic Analysis

• Monitor system calls

• Track driver communications

• Analyze network traffic

• Debug with hypervisor tools

Bypass Categories

Memory Access

• Physical memory read/write

• DMA-based access

• Hypervisor memory virtualization

• Driver-based access

Code Execution

• Manual mapping

• Thread hijacking

• APC injection

• Kernel callbacks

Detection Evasion

• Signature mutation

• Timing attack mitigation

• Stack spoofing

• Module hiding

Security Features Interaction

Windows Security

• Driver Signature Enforcement (DSE)

• PatchGuard/Kernel Patch Protection

• Hypervisor Code Integrity (HVCI)

• Secure Boot

Virtualization

• VT-x/AMD-V detection

• Hypervisor presence checks

• VM escape detection

• Timing-based detection

Ethical Considerations

Research Guidelines

• Focus on understanding, not exploitation

• Report vulnerabilities responsibly

• Respect Terms of Service implications

• Consider impact on gaming communities

Legal Aspects

• DMCA considerations

• CFAA implications

• Regional regulations

• ToS enforcement

Resources Organization

Detection Research

• Anti-cheat driver analysis
• Detection routine documentation
• Callback enumeration tools

Bypass Research

• Memory access techniques
• Injection methods
• Evasion strategies

Tools

• Custom debuggers
• Driver loaders
• Analysis frameworks

Data Source

Important: This skill provides conceptual guidance and overview information. For detailed information including:

• Specific GitHub repository links

• Complete project lists with descriptions

• Up-to-date tools and resources

• Code examples and implementations

Please fetch the complete data from the main repository:

https://raw.githubusercontent.com/gmh5225/awesome-game-security/refs/heads/main/README.md

The main README contains thousands of curated links organized by category. When users ask for specific tools, projects, or implementations, retrieve and reference the appropriate sections from this source.