Detects whether the memory of your process has been scanned

Antiscan

// Link with psapi.lib

#define NOMINMAX
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include <Psapi.h>

int main (void)
{
	// Allocate some non-physically backed memory
	auto address = VirtualAlloc (nullptr, 0x1000,
		MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

	while (true)
	{
		// Usually performed in some detection thread
		PSAPI_WORKING_SET_EX_INFORMATION info = { 0 };
		info.VirtualAddress = address;

		// Check if our non-physically backed memory is valid
		auto result = QueryWorkingSetEx (GetCurrentProcess(),
			&info, sizeof (PSAPI_WORKING_SET_EX_INFORMATION));

		// Shouldn't happen
		if (result == FALSE)
			return 1;

		// Check if a scan was preformed
		if (info.VirtualAttributes.Valid)
			return 2; // Scan detected!!

		Sleep (50);
	}

	return 0;
}