Modern Xigncode3 enumerates all running threads every 500ms. If a thread exists that is not signed by Microsoft or the game publisher, and it attempts to call NtReadVirtualMemory on the game process, the thread is terminated. Cheat Engine’s VEH (Vectored Exception Handler) debugger method relies on creating new threads—immediately detectable.
: These methods are most effective on games that do not require a constant "heartbeat" communication between the anti-cheat and the server.
: Platforms like Guided Hacking provide updated tutorials and source codes for bypassing various anti-cheats, including XIGNCODE3. Undetected Cheat Engine Tutorial Bypass Anticheat