The Valve Anti-Cheat (VAC) system and VAC Live for CS2 scan for these specific injections. Using them will lead to a permanent account ban and a loss of all in-game skins.
To give you the most helpful information, are you this file, or were you looking for a way to practice specific skills (like smokes or aim) safely? csgocheat.dll
Using or downloading unknown .dll files for gaming carries significant risks to your computer and your accounts: The Valve Anti-Cheat (VAC) system and VAC Live