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https://github.com/Cc28256/CcRemote.git
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部分汇编 区段分配到申请的内存
This commit is contained in:
Cc28257
parent
383be8f669
commit
fcae666dfd
@ -347,7 +347,7 @@ inline DWORD calc_name_hash()
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enum LocalEnum
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{
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Nop,
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memAddress = 4,
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PEAddress = 4,
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pLoadLibraryA = 8,
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pGetProcAddress = 0xC,
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pVirtualAlloc = 0x10,
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@ -385,20 +385,20 @@ extern "C" __declspec(dllexport) void ReflectiveLoader()
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call GetCurrentPositionAddress // 获取当前位置地址
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mov eax, buffer
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mov [ebp + memAddress], eax // 保存当前代码所在的地址 memAddress
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mov [ebp + PEAddress], eax // 保存当前代码所在的地址 PEAddress
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addressAdd :
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mov eax, 1
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test eax, eax // 判断eax是否获取到当前地址
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jz find_success
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mov ecx, [ebp + memAddress] // 查找DOS头
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mov ecx, [ebp + PEAddress] // 查找DOS头
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movzx edx, word ptr[ecx]
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cmp edx, 0x5A4D
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jnz noFindFlag
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mov eax, [ebp + memAddress]
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mov eax, [ebp + PEAddress]
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mov ecx, [eax + 0x3C] // + 0x3C 找到DOS Header e_lfanew
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mov [ebp + varLocalFindPE], ecx
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cmp dword ptr[ebp + varLocalFindPE], 0x40
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@ -407,7 +407,7 @@ extern "C" __declspec(dllexport) void ReflectiveLoader()
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jnb noFindFlag // 地址address - 1
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mov edx, [ebp + varLocalFindPE]
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add edx, [ebp + memAddress]
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add edx, [ebp + PEAddress]
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mov [ebp + varLocalFindPE], edx
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mov eax, [ebp + varLocalFindPE]
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cmp dword ptr[eax], 0x4550 // 判断PE Header Signature PE标志
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@ -415,9 +415,9 @@ extern "C" __declspec(dllexport) void ReflectiveLoader()
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jmp find_success // 找到了singtrue 跳转
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noFindFlag :
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mov ecx, [ebp + memAddress] // 地址address - 1
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mov ecx, [ebp + PEAddress] // 地址address - 1
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sub ecx, 1
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mov [ebp + memAddress], ecx
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mov [ebp + PEAddress], ecx
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jmp addressAdd
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find_success:
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@ -430,9 +430,9 @@ extern "C" __declspec(dllexport) void ReflectiveLoader()
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mov eax, [edx + 0x14] // 获取结构中InMemoryOrderModuleList 顺序模块列表
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mov [ebp + varLocalFS30_B], eax
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loc_46327B:
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continue_find:
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cmp [ebp + varLocalFS30_B], 0
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jz find_moudle_null
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jz find_moudle_over
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mov ecx, [ebp + varLocalFS30_B]
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mov edx, [ecx + 0x28] // FullDllName_buff 模块名称
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mov [ebp + BaseDllName], edx
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@ -584,11 +584,11 @@ extern "C" __declspec(dllexport) void ReflectiveLoader()
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jmp find_next_ker_fun
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cmp_need_function:
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jmp loc_463506
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jmp check_function
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no_Kernel32_hash:
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cmp [ebp+name_hash], 0x3CFA685D //; 3CFA685D = ntdll
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jnz loc_463506
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jnz check_function
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mov ecx, [ebp+varLocalFS30_B]
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mov edx, [ecx+0x10] //; +10偏移获取DllBase基址
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mov [ebp+varLocalFS30_A], edx
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@ -617,12 +617,12 @@ extern "C" __declspec(dllexport) void ReflectiveLoader()
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mov [ebp+var_4], ax
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find_next_nt_fun: // 同上面一样
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movzx ecx, [ebp+var_4]
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movzx ecx, [ebp+var_4] // 需要一个函数 var_4 = 1
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test ecx, ecx
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jle loc_463506
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mov edx, [ebp+exp_AddressOfNames]
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mov eax, [ebp+varLocalFS30_A]
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add eax, [edx]
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jle check_function
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mov edx, [ebp+exp_AddressOfNames] // exp_AddressOfNames = 函数名称表[]
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mov eax, [ebp+varLocalFS30_A] // varLocalFS30_A = 基地址
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add eax, [edx] // 计算hash
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push eax
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call calc_name_hash
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add esp, 4
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@ -659,12 +659,104 @@ extern "C" __declspec(dllexport) void ReflectiveLoader()
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mov [ebp+AddressOfNameOrdinals], edx
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jmp find_next_nt_fun
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check_function:
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cmp [ebp+LoadLibraryA], 0
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jz continue_find_function
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cmp [ebp+GetProcAddress], 0
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jz continue_find_function
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cmp [ebp+VirtualAlloc], 0
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jz continue_find_function
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cmp [ebp+pNtFlushInstructionCache], 0
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jz continue_find_function
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jmp find_moudle_over
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find_moudle_null:
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continue_find_function:
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mov eax, [ebp+var_C]
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mov ecx, [eax]
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mov [ebp+var_C], ecx
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jmp continue_find
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loc_463506:
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find_moudle_over:
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mov edx, [ebp+PEAddress]
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mov eax, [ebp+PEAddress]
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add eax, [edx+3Ch]
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mov [ebp+var_24], eax
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push 0x04 // PAGE_READWRITE 区域不可执行代码，应用程序可以读写该区域
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push 0x3000 // MEM_COMMIT | MEM_RESERV
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mov ecx, [ebp+var_24]
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mov edx, [ecx+0x50] // PE signature 0x18 + 0x38 SizeOfImage 映像装入内存后的总大小
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add edx, 0x3C00000 // dwSize
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push edx
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push 0x0
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call [ebp+VirtualAlloc] // 申请一块 3C0000+SizeOfImage大小的内存
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mov [ebp+var_8], eax // var_8 = mem_address
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mov eax, [ebp+var_24] // var_24 = signature
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mov ecx, [eax+0x54] // ecx = SizeOfHeaders 0x18 + 0x3c
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mov [ebp+var_C], ecx
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mov edx, [ebp+PEAddress] // PEAddress = 4D5A address
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mov [ebp+BaseDllName], edx // BaseDllName = PEAddress
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mov eax, [ebp+var_8]
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mov [ebp+name_hash], eax // name_hash = mem_address
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mov ecx, [ebp+var_24]
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movzx edx, word ptr [ecx+0x14] // edx = WORD SizeOfOptionalHeader
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mov eax, [ebp+var_24]
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lea ecx, [eax+edx+0x18] // signature + SizeOfOptionalHeader + sizeof signature = struct _IMAGE_SECTION_HEADER address 区段地址
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mov [ebp+var_C], ecx // var_C = 区段地址
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mov edx, [ebp+var_24]
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movzx eax, word ptr [edx+0x06] // signature + 0x04 + 0x02
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mov [ebp+var_3C], eax // var_3C = NumberOfSections 节的数量
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loc_463585:
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mov ecx, [ebp+var_3C]
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mov [ebp+var_58], ecx // var_58 = 剩余要处理的Sections数量 index
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mov edx, [ebp+var_3C]
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sub edx, 1
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mov [ebp+var_3C], edx
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cmp [ebp+var_58], 0 // 区段是否都处理了
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jz loc_463614
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mov eax, [ebp+var_C] // var_C = 区段地址
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mov ecx, [ebp+var_8] // var_8 = mem_address
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add ecx, [eax+0x0C] // 申请的地址计算 基址 + 区段地址 +0x0c = struct _IMAGE_SECTION_HEADER->VirtualAddress 节区的 RVA 地址
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mov [ebp+BaseDllName], ecx // BaseDllName = SECTION VirtualAddress new mem 新地址
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mov edx, [ebp+var_C]
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mov eax, [ebp+PEAddress] // eax = 4D5A address
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add eax, [edx+0x14] // 取值 4D5A address + PointerToRawData = 区段地址 + 0x14 = struct _IMAGE_SECTION_HEADER->PointerToRawData 文件中区段偏移
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mov [ebp+name_hash], eax // name_hash = _IMAGE_SECTION_HEADER->PointerToRawData 在文件中的偏移量
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mov ecx, [ebp+var_C] // var_C = 区段地址
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mov edx, [ecx+0x10] //
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mov [ebp+var_14], edx // var_14 = _IMAGE_SECTION_HEADER->SizeOfRawData 在文件中对齐后的尺寸
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cmp [ebp+var_50], 0
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jnz loc_4635C7
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mov eax, [ebp+BaseDllName]
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mov [ebp+var_50], eax // var_50 = SECTION VirtualAddress new mem 新地址
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loc_4635C7:
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cmp [ebp+var_4C], 0
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jnz loc_4635D3
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mov ecx, [ebp+var_14]
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mov [ebp+var_4C], ecx // var_4C = SizeOfRawData
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loc_4635D3:
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mov edx, [ebp+var_14]
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mov [ebp+var_5C], edx // var_5C = SizeOfRawData
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mov eax, [ebp+var_14]
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sub eax, 1 // 拷贝计数size - 1
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mov [ebp+var_14], eax // var_14 = SizeOfRawData 在文件中对齐后的尺寸 - 1
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cmp [ebp+var_5C], 0 // 为 0 拷贝完成
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jz short loc_463606
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mov ecx, [ebp+BaseDllName] // BaseDllName = SECTION VirtualAddress new mem 新地址
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mov edx, [ebp+name_hash] // PointerToRawData
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mov al, [edx] // 得到文件中的区段数据
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mov [ecx], al // 拷贝到申请的mem中 算出来的偏移VirtualAddress
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mov ecx, [ebp+BaseDllName]
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add ecx, 1 // 新的内存地址 + 1
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mov [ebp+BaseDllName], ecx
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mov edx, [ebp+name_hash] // 文件内存地址 + 1
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add edx, 1
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mov [ebp+name_hash], edx
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jmp loc_4635D3 //跳转后文件对其尺寸 - 1 为 0 时区段拷贝完毕
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}
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}
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