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@ -14,26 +14,40 @@ but is removed after every syscall into NtShutdownSystem to prevent possible det
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In this example VDM syscalls into an inline hook placed on NtShutdownSystem to call memcpy exported from ntoskrnl.exe.
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#### Demo Code
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```cpp
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vdm::vdm_ctx vdm;
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const auto ntoskrnl_base =
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reinterpret_cast<void*>(
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util::get_module_base("ntoskrnl.exe"));
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const auto ntoskrnl_memcpy =
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util::get_kernel_export("ntoskrnl.exe", "memcpy");
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std::printf("[+] drv_handle -> 0x%x, drv_key -> %s\n", drv_handle, drv_key.c_str());
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std::printf("[+] %s physical address -> 0x%p\n", vdm::syscall_hook.first, vdm::syscall_address.load());
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std::printf("[+] ntoskrnl base address -> 0x%p\n", ntoskrnl_base);
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std::printf("[+] ntoskrnl memcpy address -> 0x%p\n", ntoskrnl_memcpy);
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short mz_bytes = 0;
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vdm.syscall<decltype(&memcpy)>(ntoskrnl_memcpy, &mz_bytes, ntoskrnl_base, sizeof mz_bytes);
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std::printf("[+] kernel MZ -> 0x%x\n", mz_bytes);
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vdm::vdm_ctx vdm;
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const auto ntoskrnl_base =
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reinterpret_cast<void*>(
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util::get_module_base("ntoskrnl.exe"));
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const auto ntoskrnl_memcpy =
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util::get_kernel_export("ntoskrnl.exe", "memcpy");
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std::printf("[+] drv_handle -> 0x%x, drv_key -> %s\n", drv_handle, drv_key.c_str());
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std::printf("[+] %s physical address -> 0x%p\n", vdm::syscall_hook.first, vdm::syscall_address.load());
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std::printf("[+] ntoskrnl base address -> 0x%p\n", ntoskrnl_base);
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std::printf("[+] ntoskrnl memcpy address -> 0x%p\n", ntoskrnl_memcpy);
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short mz_bytes = 0;
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vdm.syscall<decltype(&memcpy)>(
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ntoskrnl_memcpy,
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&mz_bytes,
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ntoskrnl_base,
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sizeof mz_bytes
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);
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std::printf("[+] kernel MZ -> 0x%x\n", mz_bytes);
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```
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#### Demo Code Result
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```
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[+] drv_handle -> 0x70, drv_key -> frAQBc8Wsa1xVPfv
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[+] NtShutdownSystem physical address -> 0x00000000109BB3A0
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[+] ntoskrnl base address -> 0xFFFFF80075200000
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[+] ntoskrnl memcpy address -> 0xFFFFF800755F0980
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[+] kernel MZ -> 0x5a4d
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[+] press any key to close...
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```
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# Usage
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