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Support hypervisor assisted hooking for analysis

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This commit is contained in:
momo5502 2022-06-07 20:42:13 +02:00
parent 4df6a9ee5b
commit e5d0058301
2 changed files with 95 additions and 53 deletions
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120
src/common/utils/hook.cpp
View File

@ -5,6 +5,7 @@
#include "concurrency.hpp"
#include "string.hpp"
#include "nt.hpp"
#ifdef max
#undef max
@ -18,6 +19,17 @@ namespace utils::hook
{
namespace
{
void install_ept_hook(const void* addr, const void* data, const size_t length)
{
static const auto hyperhook_lib = utils::nt::library::load(std::string("hyperhook.dll"));
hyperhook_lib.invoke<void>("hyperhook_patch_data", GetCurrentProcessId(), addr, data, length);
}
void install_ept_hook(const uint64_t addr, const void* data, const size_t length)
{
install_ept_hook(reinterpret_cast<void*>(addr), data, length);
}
uint8_t* allocate_somewhere_near(const void* base_address, const size_t size)
{
size_t offset = 0;
@ -30,7 +42,8 @@ namespace utils::hook
return nullptr;
}
const auto res = VirtualAlloc(const_cast<uint8_t*>(target_address), size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
const auto res = VirtualAlloc(const_cast<uint8_t*>(target_address), size, MEM_RESERVE | MEM_COMMIT,
PAGE_READWRITE);
if (res)
{
if (is_relatively_far(base_address, target_address))
@ -48,6 +61,7 @@ namespace utils::hook
{
public:
memory() = default;
memory(const void* ptr)
: memory()
{
@ -75,7 +89,7 @@ namespace utils::hook
memory& operator=(memory&& obj) noexcept
{
if(this != &obj)
if (this != &obj)
{
this->~memory();
this->buffer_ = obj.buffer_;
@ -92,11 +106,13 @@ namespace utils::hook
void* allocate(const size_t length)
{
if(!this->buffer_) {
if (!this->buffer_)
{
return nullptr;
}
if(this->offset_ + length > this->length_) {
if (this->offset_ + length > this->length_)
{
return nullptr;
}
@ -122,12 +138,12 @@ namespace utils::hook
return memory_container.access<void*>([&](std::vector<memory>& memories)
{
for(auto& memory : memories)
for (auto& memory : memories)
{
if(!is_relatively_far(address, memory.get_ptr()))
if (!is_relatively_far(address, memory.get_ptr()))
{
const auto buffer = memory.allocate(size);
if(buffer)
if (buffer)
{
return buffer;
}
@ -150,17 +166,17 @@ namespace utils::hook
get_original_data_map().access([data, length](std::map<const void*, uint8_t>& og_map)
{
const auto data_ptr = static_cast<const uint8_t*>(data);
for(size_t i = 0; i < length; ++i)
for (size_t i = 0; i < length; ++i)
{
const auto pos = data_ptr + i;
if(!og_map.contains(pos))
if (!og_map.contains(pos))
{
og_map[pos] = *pos;
}
}
});
}
void* initialize_min_hook()
{
static class min_hook_init
@ -358,8 +374,16 @@ namespace utils::hook
return true;
}
void nop(void* place, const size_t length)
void nop(void* place, const size_t length, const bool use_ept)
{
if (use_ept)
{
std::vector<uint8_t> nops{};
nops.resize(length, 0x90);
install_ept_hook(place, nops.data(), nops.size());
return;
}
store_original_data(place, length);
DWORD old_protect{};
@ -371,13 +395,19 @@ namespace utils::hook
FlushInstructionCache(GetCurrentProcess(), place, length);
}
void nop(const size_t place, const size_t length)
void nop(const size_t place, const size_t length, const bool use_ept)
{
nop(reinterpret_cast<void*>(place), length);
nop(reinterpret_cast<void*>(place), length, use_ept);
}
void copy(void* place, const void* data, const size_t length)
void copy(void* place, const void* data, const size_t length, const bool use_ept)
{
if (use_ept)
{
install_ept_hook(place, data, length);
return;
}
store_original_data(place, length);
DWORD old_protect{};
@ -389,9 +419,9 @@ namespace utils::hook
FlushInstructionCache(GetCurrentProcess(), place, length);
}
void copy(const size_t place, const void* data, const size_t length)
void copy(const size_t place, const void* data, const size_t length, const bool use_ept)
{
copy(reinterpret_cast<void*>(place), data, length);
copy(reinterpret_cast<void*>(place), data, length, use_ept);
}
bool is_relatively_far(const void* pointer, const void* data, const int offset)
@ -401,7 +431,7 @@ namespace utils::hook
return diff != int64_t(small_diff);
}
void call(void* pointer, void* data)
void call(void* pointer, void* data, const bool use_ept)
{
if (is_relatively_far(pointer, data))
{
@ -411,27 +441,30 @@ namespace utils::hook
throw std::runtime_error("Too far away to create 32bit relative branch");
}
call(pointer, trampoline);
call(pointer, trampoline, use_ept);
jump(trampoline, data, true, true);
return;
}
uint8_t copy_data[5];
copy_data[0] = 0xE8;
*reinterpret_cast<int32_t*>(&copy_data[1]) = int32_t(size_t(data) - (size_t(pointer) + 5));
auto* patch_pointer = PBYTE(pointer);
set<uint8_t>(patch_pointer, 0xE8);
set<int32_t>(patch_pointer + 1, int32_t(size_t(data) - (size_t(pointer) + 5)));
copy(patch_pointer, copy_data, sizeof(copy_data), use_ept);
}
void call(const size_t pointer, void* data)
void call(const size_t pointer, void* data, const bool use_ept)
{
return call(reinterpret_cast<void*>(pointer), data);
return call(reinterpret_cast<void*>(pointer), data, use_ept);
}
void call(const size_t pointer, const size_t data)
void call(const size_t pointer, const size_t data, const bool use_ept)
{
return call(pointer, reinterpret_cast<void*>(data));
return call(pointer, reinterpret_cast<void*>(data), use_ept);
}
void jump(void* pointer, void* data, const bool use_far, const bool use_safe)
void jump(void* pointer, void* data, const bool use_far, const bool use_safe, const bool use_ept)
{
static const unsigned char jump_data[] = {
0x48, 0xb8, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11, 0xff, 0xe0
@ -444,11 +477,11 @@ namespace utils::hook
if (!use_far && is_relatively_far(pointer, data))
{
auto* trampoline = get_memory_near(pointer, 14);
if(!trampoline)
if (!trampoline)
{
throw std::runtime_error("Too far away to create 32bit relative branch");
}
jump(pointer, trampoline);
jump(pointer, trampoline, false, false, use_ept);
jump(trampoline, data, true, true);
return;
}
@ -459,30 +492,39 @@ namespace utils::hook
{
if (use_safe)
{
copy(patch_pointer, jump_data_safe, sizeof(jump_data_safe));
copy(patch_pointer + sizeof(jump_data_safe), &data, sizeof(data));
uint8_t copy_data[sizeof(jump_data_safe) + sizeof(data)];
memcpy(copy_data, jump_data_safe, sizeof(jump_data_safe));
memcpy(copy_data + sizeof(jump_data_safe), &data, sizeof(data));
copy(patch_pointer, copy_data, sizeof(copy_data), use_ept);
}
else
{
copy(patch_pointer, jump_data, sizeof(jump_data));
copy(patch_pointer + 2, &data, sizeof(data));
uint8_t copy_data[sizeof(jump_data)];
memcpy(copy_data, jump_data, sizeof(jump_data));
memcpy(copy_data + 2, &data, sizeof(data));
copy(patch_pointer, copy_data, sizeof(copy_data), use_ept);
}
}
else
{
set<uint8_t>(patch_pointer, 0xE9);
set<int32_t>(patch_pointer + 1, int32_t(size_t(data) - (size_t(pointer) + 5)));
uint8_t copy_data[5];
copy_data[0] = 0xE9;
*reinterpret_cast<int32_t*>(&copy_data[1]) = int32_t(size_t(data) - (size_t(pointer) + 5));
copy(patch_pointer, copy_data, sizeof(copy_data), use_ept);
}
}
void jump(const size_t pointer, void* data, const bool use_far, const bool use_safe)
void jump(const size_t pointer, void* data, const bool use_far, const bool use_safe, const bool use_ept)
{
return jump(reinterpret_cast<void*>(pointer), data, use_far, use_safe);
return jump(reinterpret_cast<void*>(pointer), data, use_far, use_safe, use_ept);
}
void jump(const size_t pointer, const size_t data, const bool use_far, const bool use_safe)
void jump(const size_t pointer, const size_t data, const bool use_far, const bool use_safe, const bool use_ept)
{
return jump(pointer, reinterpret_cast<void*>(data), use_far, use_safe);
return jump(pointer, reinterpret_cast<void*>(data), use_far, use_safe, use_ept);
}
void* assemble(const std::function<void(assembler&)>& asm_function)
@ -572,10 +614,10 @@ namespace utils::hook
get_original_data_map().access([data, length, &og_data](const std::map<const void*, uint8_t>& og_map)
{
auto* ptr = static_cast<const uint8_t*>(data);
for(size_t i = 0; i < length; ++i)
for (size_t i = 0; i < length; ++i)
{
auto entry = og_map.find(ptr + i);
if(entry != og_map.end())
if (entry != og_map.end())
{
og_data[i] = entry->second;
}

28
src/common/utils/hook.hpp
View File

@ -149,21 +149,21 @@ namespace utils::hook
bool iat(const nt::library& library, const std::string& target_library, const std::string& process, void* stub);
void nop(void* place, size_t length);
void nop(size_t place, size_t length);
void nop(void* place, size_t length, bool use_ept = false);
void nop(size_t place, size_t length, bool use_ept = false);
void copy(void* place, const void* data, size_t length);
void copy(size_t place, const void* data, size_t length);
void copy(void* place, const void* data, size_t length, bool use_ept = false);
void copy(size_t place, const void* data, size_t length, bool use_ept = false);
bool is_relatively_far(const void* pointer, const void* data, int offset = 5);
void call(void* pointer, void* data);
void call(size_t pointer, void* data);
void call(size_t pointer, size_t data);
void call(void* pointer, void* data, bool use_ept = false);
void call(size_t pointer, void* data, bool use_ept = false);
void call(size_t pointer, size_t data, bool use_ept = false);
void jump(void* pointer, void* data, bool use_far = false, bool use_safe = false);
void jump(size_t pointer, void* data, bool use_far = false, bool use_safe = false);
void jump(size_t pointer, size_t data, bool use_far = false, bool use_safe = false);
void jump(void* pointer, void* data, bool use_far = false, bool use_safe = false, bool use_ept = false);
void jump(size_t pointer, void* data, bool use_far = false, bool use_safe = false, bool use_ept = false);
void jump(size_t pointer, size_t data, bool use_far = false, bool use_safe = false, bool use_ept = false);
void* assemble(const std::function<void(assembler&)>& asm_function);
@ -184,15 +184,15 @@ namespace utils::hook
void* follow_branch(void* address);
template <typename T>
static void set(void* place, T value)
static void set(void* place, T value, const bool use_ept = false)
{
copy(place, &value, sizeof(value));
copy(place, &value, sizeof(value), use_ept);
}
template <typename T>
static void set(const size_t place, T value)
static void set(const size_t place, T value, const bool use_ept = false)
{
return set<T>(reinterpret_cast<void*>(place), value);
return set<T>(reinterpret_cast<void*>(place), value, use_ept);
}
template <typename T, typename... Args>