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Anyone digging into the older private server scene lately? I took a look at Freestyle GunZ and their current protection scheme. It is heavily packed with VMProtect and seems to have inherited some legacy anti-cheat modules that have been Frankenstein-ed together over the years.
The Protection Mechanism
The client sets memory pages to PAGE_EXECUTE_READ and specifically hooks NtProtectVirtualMemory within ntdll. Their implementation is quite aggressive—it's not just a simple integrity check. If you attempt to unhook NtProtectVirtualMemory and then proceed to write to memory, you will trigger a fingerprinting routine. This results in an immediate client closure followed by an IP ban and HWID fingerprinting. They are essentially baiting you to restore the function so they can catch the subsequent write attempt.
Bypass Strategies
To get around this without getting your hardware flagged, you need to be surgical with how you handle the process state and ntdll hooks. Testing confirms a couple of viable paths:
If you're trying to inject basic internal hacks or even simple K-Style macros that require memory modification, you'll hit this wall immediately. The server-side doesn't seem to have much advanced telemetry, so as long as you bypass the local ntdll trap, you're usually golden. Just be careful with the fingerprinting—if you mess up the timing on the suspension, you'll be cycling IPs for the rest of the night.
Anyone else found a more elegant way to spoof the integrity check without a full suspend/resume cycle?
The Protection Mechanism
The client sets memory pages to PAGE_EXECUTE_READ and specifically hooks NtProtectVirtualMemory within ntdll. Their implementation is quite aggressive—it's not just a simple integrity check. If you attempt to unhook NtProtectVirtualMemory and then proceed to write to memory, you will trigger a fingerprinting routine. This results in an immediate client closure followed by an IP ban and HWID fingerprinting. They are essentially baiting you to restore the function so they can catch the subsequent write attempt.
Bypass Strategies
To get around this without getting your hardware flagged, you need to be surgical with how you handle the process state and ntdll hooks. Testing confirms a couple of viable paths:
- The Suspension Method: First, you must suspend the target process. Only then do you unhook the function, change the page protection, place your own hooks, and then—critically—restore the previous protection and reapply their original hook before resuming the process.
- The Fresh Mapping Method: This is cleaner but requires more overhead. Suspend the process, copy the ntdll bytes, or better yet, map a fresh ntdll from disk. Change the protection on your fresh map, place your hooks, restore protection, and then write back the original ntdll state with their hook intact before resuming.
Code:
// Logical flow for a successful hook placement:
1. OpenProcess / SuspendThread
2. Read ntdll.dll from disk or fresh memory
3. Patch NtProtectVirtualMemory trap
4. Write your payload / place hooks
5. Restore original ntdll state to satisfy the check
6. ResumeThreadIf you're trying to inject basic internal hacks or even simple K-Style macros that require memory modification, you'll hit this wall immediately. The server-side doesn't seem to have much advanced telemetry, so as long as you bypass the local ntdll trap, you're usually golden. Just be careful with the fingerprinting—if you mess up the timing on the suspension, you'll be cycling IPs for the rest of the night.
Anyone else found a more elegant way to spoof the integrity check without a full suspend/resume cycle?
