Make anticheat for unity engine

[er132]

Hi im trying to code anticheat in c# for unity games 

But i cant detcted dll injection actually i try loaded dll and moudel but itsnt work becuse its mono inejection

Any buddy can help me?

[NOP]

There is already a few anti cheat plugins for Unity in case you didn't know...

Code Stage - Anti Cheat Toolkit is one I have seen in lots of unity games, its not free but does detect injections

[er132]

im not access to main source to add codestage toolkit im want to detect by processe do you have any idea for this??

[atom0s]

Before you potentially dump $50 on CodeStage, look around for free options. 
Most of what's offered in his library is already free. 

Protected memory/variables:
 - https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.protectedmemory
 - https://gamedev.stackexchange.com/a/9851 (Xor'd value, same as how CodeStage protects.)
 - https://www.alanzucconi.com/2015/09/02/a-practical-tutorial-to-hack-and-protect-unity-games/
 - https://github.com/Ymiku/SafeInt
 - https://github.com/pedro15/UniToolKit

Protected player prefs:
 - https://www.alanzucconi.com/2015/09/02/a-practical-tutorial-to-hack-and-protect-unity-games/
 - https://gist.github.com/ftvs/5299600
 - https://github.com/rawandnf/SecurePlayerPrefs
 - Any kind of encryption you prefer works for this.

Generate Code Hashes:
 - Use System.Reflection for this. (MethodBody -> GetILAsByteArray -> hash etc.)

Detect Speed Hack:
 - This is done by monitoring the ticks of an application in a timer/thread checking for any sudden increases that cause the timing of the app/process to be considered fast/slow. 
 - https://github.com/WizardVan/UnityDetector

Detect Wall Hacks:
 - This is done a number of ways depending on what kind of detection you are looking for.

Detect Injections:
 - Walk/monitor the app domains assembly list for unknown modules. (AppDomain.CurrentDomain.GetAssemblies())
 - Track a list of valid/allowed modules + checksum hashes.
 - Track IL edits to functions via hash checks.

Keep in mind all of this is bypassable, editable, etc. by a hack/cheat/mod so while you are adding a layer of security it will only work against certain people whom are not familiar with bypassing this kind of stuff.
 

[GautamGreat]

@kao,  Reversed some really cool "Unity3D protection" checkout his blog. You will get some idea about protection.