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Anyone currently digging into kernel-level development knows the struggle: you build a driver, use standard APIs like MmCopyVirtualMemory, and get clapped by the next ban wave. If you’re moving past the "paste kid" phase and actually reading Books like Windows Kernel Programming, you eventually hit the wall of reality. The question isn't just about the method, it's about the workflow of staying ahead of BattlEye (BE) and EasyAntiCheat (EAC).
Common Vectors and Why They Fail
Many newcomers rotate through the same three or four "high-level" concepts, thinking they are original. In reality, modern ACs have spent years hardening against these exact things:
The Real Workflow: Reversing the .sys Files
So, does it really boil down to manual reversing? The short answer: Yes.
If you want to stay UD (Undetected) for more than a week, you can't rely on public windows internal articles. You have to be willing to rip apart BEDaisy.sys or EasyAntiCheat.sys every time they push an update. The goal isn't just to "find a gap," but to understand the heuristic engine being deployed against you.
Technical Reality Check
Whether you are working on Tarkov, Fortnite, or Rust, the anti-cheat is a living product. They are getting better at spotting non-standard PTE entries and walking page tables directly. If you aren't reversing their driver to see how they are walking those tables, you are just gambling with your account.
Architecture-wise, moving toward DMA (Direct Memory Access) with custom firmware is often the play for long-term safety, but even then, you're still dealing with server-side heuristics and detection of the communication hardware itself.
Is anyone here actually maintaining a private hypervisor build, or have most of you moved to DMA hardware to avoid the constant kernel-mode cat-and-mouse game?
Common Vectors and Why They Fail
Many newcomers rotate through the same three or four "high-level" concepts, thinking they are original. In reality, modern ACs have spent years hardening against these exact things:
- Hypervisors / VT-x: Trapping VM exits and shadow EPT pages. It sounds like god-mode, but VM exits are expensive. If you don't handle timing detections (RDTSC/instability checks), you're flagged. Plus, running complex cheat logic inside the hypervisor itself is a nightmare.
- BYOVD (Bring Your Own Vulnerable Driver): Using a signed but vulnerable driver to map physical memory. This is basically a cat-and-mouse game of blacklisting. Once the driver hash is burned by EAC/BE, your "clean" user mode app is useless.
- Manual Mapping: Hiding from the module list and device object list. The problem? BE and EAC are aggressive at scanning the non-paged pool for executable pages that don't belong to a legitimate module. If your code is floating in memory or you have weirdly mapped PTE entries, you're done.
The Real Workflow: Reversing the .sys Files
So, does it really boil down to manual reversing? The short answer: Yes.
If you want to stay UD (Undetected) for more than a week, you can't rely on public windows internal articles. You have to be willing to rip apart BEDaisy.sys or EasyAntiCheat.sys every time they push an update. The goal isn't just to "find a gap," but to understand the heuristic engine being deployed against you.
- Pull the new driver build immediately after an update.
- Diff the new .sys against the previous version to see what callbacks (ObRegisterCallbacks, etc.) or checks were added.
- Identify what they are not currently monitoring. Sometimes they pull back on specific scans due to performance overhead or false positives on certain hardware.
- Build the smallest possible footprint. The less you touch, the less likely you are to trip a heuristic.
- Assume the method will be patched. Keep your core logic decoupled from your injection/comm method so you can swap them out when the sigs get hit.
Technical Reality Check
Whether you are working on Tarkov, Fortnite, or Rust, the anti-cheat is a living product. They are getting better at spotting non-standard PTE entries and walking page tables directly. If you aren't reversing their driver to see how they are walking those tables, you are just gambling with your account.
Architecture-wise, moving toward DMA (Direct Memory Access) with custom firmware is often the play for long-term safety, but even then, you're still dealing with server-side heuristics and detection of the communication hardware itself.
Is anyone here actually maintaining a private hypervisor build, or have most of you moved to DMA hardware to avoid the constant kernel-mode cat-and-mouse game?
