They draw information (like player boxes) on a transparent window layered over the game.

The use of external hacks in Call of Duty: Warzone represents an ongoing arms race between cheat developers and Activision’s system. While "external" cheats are marketed as safer alternatives to traditional "internal" hacks, they still carry significant risks for players. 🛡️ What are External Hacks?

Even if the software isn't caught, "rage hacking" (getting 30+ kills) leads to player reports and manual reviews.

If caught, Activision often bans your hardware ID, preventing you from simply making a new account.

Accounts may be placed in lobbies with other suspected cheaters while under investigation.

They read game data from RAM without modifying the game files.