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maincode.pas
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/// Very simple packer
/// Uses APLib 0.42
/// Packs only section #1
//////////////////////////////////////////////
/// Thanks: -=ALEX=- [KpTeam], vins, MC707 ///
//////////////////////////////////////////////
/// Author: FEUERRADER [AHTeam] ///
//////////////////////////////////////////////
/// Use parts of code with mention of my name!
//////////////////////////////////////////////
unit maincode;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, aPLib, StdCtrls, ComCtrls, PE_Files, Menus, ExtCtrls, shellapi;
type
TForm1 = class(TForm)
aPLib: TaPLib;
pb: TProgressBar;
OpenFiler: TOpenDialog;
StatusBar1: TStatusBar;
clocks: TTimer;
GroupBox1: TGroupBox;
fileedit: TEdit;
XPButton1: TButton;
GroupBox2: TGroupBox;
log: TMemo;
packbutton: TButton;
procedure AddLog(text:string);
procedure ClearLog;
procedure XPButton1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure clocksTimer(Sender: TObject);
procedure packbuttonClick(Sender: TObject);
private
public
CurFileSz : DWORD;
end;
(*$IFDEF DYNAMIC_VERSION*)
function CallBack(w0, w1, w2 : DWORD; cbparam : Pointer) : DWORD;stdcall;
(*$ELSE*)
function CallBack(w0, w1, w2 : DWORD; cbparam : Pointer) : DWORD;cdecl;
(*$ENDIF*)
var
Form1: TForm1;
const
packer_ver:string='AHPacker v0.1 by FEUERRADER [AHTeam]';
implementation
{$R *.dfm}
{$R windowsxp.res}
TYPE
IMAGE_DIR_ITEM=record
VirtualAddress:DWORD;
Size:DWORD;
end;
IMAGE_FILE_HEADER=record
Machine:WORD;
NumberOfSections:WORD;
TimeDateStamp:DWORD;
PointerToSymbolTable:DWORD;
NumberOfSymbols:DWORD;
SizeOfOptionalHeader:WORD;
Characteristics:WORD;
end;
IMAGE_OPTIONAL_HEADER=record
Magic:WORD;
MajorLinkerVersion:BYTE;
MinorLinkerVersion:BYTE;
SizeOfCode:DWORD;
SizeOfInitializedData:DWORD;
SizeOfUninitializedData:DWORD;
AddressOfEntryPoint:DWORD;
BaseOfCode:DWORD;
BaseOfData:DWORD;
ImageBase:DWORD;
SectionAlignment:DWORD;
FileAlignment:DWORD;
MajorOperatingSystemVersion:WORD;
MinorOperatingSystemVersion:WORD;
MajorImageVersion:WORD;
MinorImageVersion:WORD;
MajorSubsystemVersion:WORD;
MinorSubsystemVersion:WORD;
Win32VersionValue:DWORD;
SizeOfImage:DWORD;
SizeOfHeaders:DWORD;
CheckSum:DWORD;
Subsystem:WORD;
DllCharacteristics:WORD;
SizeOfStackReserve:DWORD;
SizeOfStackCommit:DWORD;
SizeOfHeapReserve:DWORD;
SizeOfHeapCommit:DWORD;
LoaderFlags:DWORD;
NumberOfRvaAndSizes:DWORD;
IMAGE_DIRECTORY_ENTRIES:record
_EXPORT:IMAGE_DIR_ITEM;
IMPORT:IMAGE_DIR_ITEM;
RESOURCE:IMAGE_DIR_ITEM;
EXCEPTION:IMAGE_DIR_ITEM;
SECURITY:IMAGE_DIR_ITEM;
BASERELOC:IMAGE_DIR_ITEM;
DEBUG:IMAGE_DIR_ITEM;
COPYRIGHT:IMAGE_DIR_ITEM;
GLOBALPTR:IMAGE_DIR_ITEM;
TLS:IMAGE_DIR_ITEM;
CONFIG:IMAGE_DIR_ITEM;
BOUND_IMPORT:IMAGE_DIR_ITEM;
IAT:IMAGE_DIR_ITEM;
end;
DUMB:ARRAY [1..24] OF BYTE;
end;
SECTION=record
Name:packed array [0..IMAGE_SIZEOF_SHORT_NAME-1] of Char;
VirtualSize:DWORD;
VirtualAddress:DWORD;
SizeOfRawData:DWORD;
PointerToRawData:DWORD;
PointerToRelocations:DWORD;
PointerToLinenumbers:DWORD;
NumberOfRelocations:WORD;
NumberOfLinenumbers:WORD;
Characteristics:DWORD;
end;
CONST
MAX_SECTION_NUMBER= $10;
VAR
PE_HEADER:record
IMAGE_NT_SIGNATURE:DWORD;
FILE_HEADER:IMAGE_FILE_HEADER;
OPTIONAL_HEADER:IMAGE_OPTIONAL_HEADER;
end;
SECTION_HEADER:ARRAY [1..MAX_SECTION_NUMBER] of SECTION;
var
hFile:DWORD;
e_lfanew:DWORD;
EXE:WORD;
i:integer;
bread:dword;
EPreal, EP, imagebase,nv,ns,fa,sa:cardinal;
num,epsec:integer;
pe:pe_file;
PACKEDSECTION:dword;
PACKEDPOS:pointer;
temp1:pointer;
temp2:pointer;
// DEPACKER vars
depbegin:dword;
stra:string;
iat:array[1..$b1] of byte;
sizeofsec:dword;
addrsec:dword;
iatrva:dword;
Function RVA2Offset(RVA:DWORD):DWORD;
var i:integer;
VirtAddr,VA2,szRawData,ptrRawData:DWORD;
begin
for i:=1 to PE_HEADER.FILE_HEADER.NumberOfSections do
begin
VirtAddr:=SECTION_HEADER[i].VirtualAddress;
szRawData:=SECTION_HEADER[i].SizeOfRawData;
ptrRawData:=SECTION_HEADER[i].PointerToRawData;
if RVA>=VirtAddr then
begin
VA2:=VirtAddr+szRawData;
if RVA<VA2 then
begin
RVA:=RVA-VirtAddr;
RVA:=RVA+ptrRawData;
end;
end;
end;
RVA2Offset:=RVA;
end;
function GetLoaderSize(Func:dword):dword;
begin
asm
pushad
mov eax, func
mov esi, 1
@find:
mov dword ptr ebx, [eax]
mov dword ptr ecx, [eax+4]
cmp ebx, $41504544
jnz @notf
cmp ecx, $4E454B43
jnz @notf
mov result, esi
jmp @exit
@notf:
inc esi
inc eax
jmp @find
@exit:
popad
end;
end;
procedure ImportTable;
begin
{
0045F6A4 E8 F6 05 00 00 00 00 00 00 00 00 00 F8 F6 05 00 èö.........øö.
0045F6B4 E8 F6 05 00 E0 F6 05 00 00 00 00 00 00 00 00 00 èö.àö.........
0045F6C4 05 F7 05 00 E0 F6 05 00 00 00 00 00 00 00 00 00 ÷.àö.........
0045F6D4 00 00 00 00 00 00 00 00 00 00 00 00 58 12 DA 77 ............XÚw
0045F6E4 00 00 00 00 79 BB E6 77 1F A0 E6 77 C4 EF ED 77 ....y»æw æwÄïíw
0045F6F4 00 00 00 00 4B 45 52 4E 45 4C 33 32 2E 64 6C 6C ....KERNEL32.dll
0045F704 00 55 53 45 52 33 32 2E 64 6C 6C 00 00 00 47 65 .USER32.dll...Ge
0045F714 74 50 72 6F 63 41 64 64 72 65 73 73 00 00 00 47 tProcAddress...G
0045F724 65 74 4D 6F 64 75 6C 65 48 61 6E 64 6C 65 41 00 etModuleHandleA.
0045F734 00 00 4C 6F 61 64 4C 69 62 72 61 72 79 41 00 00 ..LoadLibraryA..
0045F744 00 4D 65 73 73 61 67 65 42 6F 78 41 00 00 00 00 .MessageBoxA....
}
for i:=1 to $b1 do iat[i]:=0;
iat[1]:=Lo(DEPBEGIN-imagebase+$44);
iat[2]:=Hi(DEPBEGIN-imagebase+$44);
iat[3]:=Lo((DEPBEGIN-imagebase+$44) shr 16);
iat[4]:=Hi((DEPBEGIN-imagebase+$44) shr 16);
iat[13]:=Lo(DEPBEGIN-imagebase+$54);
iat[14]:=Hi(DEPBEGIN-imagebase+$54);
iat[15]:=Lo((DEPBEGIN-imagebase+$54) shr 16);
iat[16]:=Hi((DEPBEGIN-imagebase+$54) shr 16);
iat[17]:=Lo(DEPBEGIN-imagebase+$44);
iat[18]:=Hi(DEPBEGIN-imagebase+$44);
iat[19]:=Lo((DEPBEGIN-imagebase+$44) shr 16);
iat[20]:=Hi((DEPBEGIN-imagebase+$44) shr 16);
iat[21]:=Lo(DEPBEGIN-imagebase+$3C);
iat[22]:=Hi(DEPBEGIN-imagebase+$3C);
iat[23]:=Lo((DEPBEGIN-imagebase+$3C) shr 16);
iat[24]:=Hi((DEPBEGIN-imagebase+$3C) shr 16);
iat[33]:=Lo(DEPBEGIN-imagebase+$61);
iat[34]:=Hi(DEPBEGIN-imagebase+$61);
iat[35]:=Lo((DEPBEGIN-imagebase+$61) shr 16);
iat[36]:=Hi((DEPBEGIN-imagebase+$61) shr 16);
iat[37]:=Lo(DEPBEGIN-imagebase+$3C);
iat[38]:=Hi(DEPBEGIN-imagebase+$3C);
iat[39]:=Lo((DEPBEGIN-imagebase+$3C) shr 16);
iat[40]:=Hi((DEPBEGIN-imagebase+$3C) shr 16);
iat[61]:=Lo(DEPBEGIN-imagebase+$9F);
iat[62]:=Hi(DEPBEGIN-imagebase+$9F);
iat[63]:=Lo((DEPBEGIN-imagebase+$9F) shr 16);
iat[64]:=Hi((DEPBEGIN-imagebase+$9F) shr 16);
iat[69]:=Lo(DEPBEGIN-imagebase+$6C);
iat[70]:=Hi(DEPBEGIN-imagebase+$6C);
iat[71]:=Lo((DEPBEGIN-imagebase+$6C) shr 16);
iat[72]:=Hi((DEPBEGIN-imagebase+$6C) shr 16);
iat[73]:=Lo(DEPBEGIN-imagebase+$7D);
iat[74]:=Hi(DEPBEGIN-imagebase+$7D);
iat[75]:=Lo((DEPBEGIN-imagebase+$7D) shr 16);
iat[76]:=Hi((DEPBEGIN-imagebase+$7D) shr 16);
iat[77]:=Lo(DEPBEGIN-imagebase+$90);
iat[78]:=Hi(DEPBEGIN-imagebase+$90);
iat[79]:=Lo((DEPBEGIN-imagebase+$90) shr 16);
iat[80]:=Hi((DEPBEGIN-imagebase+$90) shr 16);
iat[85]:=byte('K');
iat[86]:=byte('E');
iat[87]:=byte('R');
iat[88]:=byte('N');
iat[89]:=byte('E');
iat[90]:=byte('L');
iat[91]:=byte('3');
iat[92]:=byte('2');
iat[93]:=byte('.');
iat[94]:=byte('D');
iat[95]:=byte('L');
iat[96]:=byte('L');
iat[98]:= byte('U');
iat[99]:= byte('S');
iat[100]:= byte('E');
iat[101]:=byte('R');
iat[102]:=byte('3');
iat[103]:=byte('2');
iat[104]:=byte('.');
iat[105]:=byte('D');
iat[106]:=byte('L');
iat[107]:=byte('L');
iat[111]:=byte('G');
iat[112]:=byte('e');
iat[113]:=byte('t');
iat[114]:=byte('P');
iat[115]:=byte('r');
iat[116]:=byte('o');
iat[117]:=byte('c');
iat[118]:=byte('A');
iat[119]:=byte('d');
iat[120]:=byte('d');
iat[121]:=byte('r');
iat[122]:=byte('e');
iat[123]:=byte('s');
iat[124]:=byte('s');
iat[128]:=byte('G');
iat[129]:=byte('e');
iat[130]:=byte('t');
iat[131]:=byte('M');
iat[132]:=byte('o');
iat[133]:=byte('d');
iat[134]:=byte('u');
iat[135]:=byte('l');
iat[136]:=byte('e');
iat[137]:=byte('H');
iat[138]:=byte('a');
iat[139]:=byte('n');
iat[140]:=byte('d');
iat[141]:=byte('l');
iat[142]:=byte('e');
iat[143]:=byte('A');
iat[147]:=byte('L');
iat[148]:=byte('o');
iat[149]:=byte('a');
iat[150]:=byte('d');
iat[151]:=byte('L');
iat[152]:=byte('i');
iat[153]:=byte('b');
iat[154]:=byte('r');
iat[155]:=byte('a');
iat[156]:=byte('r');
iat[157]:=byte('y');
iat[158]:=byte('A');
iat[162]:=byte('M');
iat[163]:=byte('e');
iat[164]:=byte('s');
iat[165]:=byte('s');
iat[166]:=byte('a');
iat[167]:=byte('g');
iat[168]:=byte('e');
iat[169]:=byte('B');
iat[170]:=byte('o');
iat[171]:=byte('x');
iat[172]:=byte('A');
end;
procedure PE_Loader; assembler;
begin
asm
// IAT
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
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ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
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ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
NOP //177 BYTES
jmp @next
// Allocating memory
// GetProcAddress 14
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
// GetModuleHandle 15
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
// GlobalAlloc 11
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
// Kernel32.dll 12
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
// User32.dll 10
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
// Kernel base
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
// user32 base
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
ADD BYTE PTR [EAX],AL
@next:
PUSHAD
push $11223344
mov eax, $11223344
call [eax] // GetModuleHandleA
push $11223344 // GlobalAlloc
push eax
mov eax, $11223344 // GetProcaAddr
call [eax]
push $11223344 // Size of section
push $40
call eax
mov [$11223344], eax // save globalalloc addr
mov edi,eax
mov esi, $11223344
pushad
cld
mov dl, 80h
xor ebx, ebx
@literal:
movsb
mov bl, 2
@nexttag:
call @getbit
jnc @literal
xor ecx, ecx
call @getbit
jnc @codepair
xor eax, eax
call @getbit
jnc @shortmatch
mov bl, 2
inc ecx
mov al, 10h
@getmorebits:
call @getbit
adc al, al
jnc @getmorebits
jnz @domatch
stosb
jmp @nexttag
@codepair:
call @getgamma_no_ecx
sub ecx, ebx
jnz @normalcodepair
call @getgamma
jmp @domatch_lastpos
@shortmatch:
lodsb
shr eax, 1
jz @donedepacking
adc ecx, ecx
jmp @domatch_with_2inc
@normalcodepair:
xchg eax, ecx
dec eax
shl eax, 8
lodsb
call @getgamma
cmp eax, 32000
jae @domatch_with_2inc
cmp ah, 5
jae @domatch_with_inc
cmp eax, 7fh
ja @domatch_new_lastpos
@domatch_with_2inc:
inc ecx
@domatch_with_inc:
inc ecx
@domatch_new_lastpos:
xchg eax, ebp
@domatch_lastpos:
mov eax, ebp
mov bl, 1
@domatch:
push esi
mov esi, edi
sub esi, eax
rep movsb
pop esi
jmp @nexttag
@getbit:
add dl, dl
jnz @stillbitsleft
mov dl, [esi]
inc esi
adc dl, dl
@stillbitsleft:
ret
@getgamma:
xor ecx, ecx
@getgamma_no_ecx:
inc ecx
@getgammaloop:
call @getbit
adc ecx, ecx
call @getbit
jc @getgammaloop
ret
@donedepacking:
POPAD
// Copy to prog block
mov ecx,$11223344
//mov ecx, $11223344 // sizeofsec
@loopim:
// Reserved
MOV EBX, [ECX+EAX] // MOV EAX, [ECX+GlobalMem]
MOV [ECX+$11223344],EBX // MOV [ECX+SectionAddr+imagebase],EAX
LOOP @loopim
NOP
NOP
// import recoverer
MOV EDX, $11223344 //imagebase
MOV ESI, $11223344 // original iat rva
ADD ESI, EDX
@dum6:
MOV EAX, [ESI+$0C]
TEST EAX,EAX
JE @end
ADD EAX,EDX
MOV EBX,EAX
push eax
mov eax, $11223344
call [eax] // GetModuleHandleA
TEST EAX,EAX
JNZ @dum1
PUSH EBX
mov eax, $11223344
call [eax] // LoadLibraryA
@dum1:
MOV [$11223344],EAX //somebuf1
MOV [$11223344],0 //somebuf2
@dum5:
MOV EDX, $1122344
MOV EAX, [ESI]
TEST EAX, EAX
JNZ @dum2
MOV EAX,[ESI+$10]
@dum2:
ADD EAX, EDX
ADD EAX, [$11223344] //somebuf2
MOV EBX,[EAX]
MOV EDI,[ESI+$10]
ADD EDI,EDX
ADD EDI,[$11223344] //somebuf2
TEST EBX, EBX
JE @dum3
TEST EBX, $80000000
JNZ @dum4
ADD EBX,EDX
INC EBX
INC EBX
@dum4:
AND EBX, $0FFFFFFF
PUSH EBX
PUSH [$11223344] //somebuf
mov eax, $11223344
call [eax] // GetProcAddress
MOV [EDI],EAX
ADD [$11223344],4 //somebuf2
JMP @dum5
@dum3:
ADD ESI,$14
MOV EDX, $11223344 //imagebase
JMP @dum6
@end:
// Free mem
push $11223344
mov eax, $11223344
call [eax] // GetModuleHandleA
push $11223344 // GlobalFree
push eax
mov eax, $11223344 // GetProcaAddr
call [eax]
mov edx, [$11223344] // get pointer to mem
push edx
call eax
// Jmp to oep
popad
mov edx, $11223344
jmp edx
nop
//=============================
retn
INC ESP //'D'
INC EBP //'E'
PUSH EAX//'P'
INC ECX //'A'
INC EBX //'C'
DEC EBX //'K'
INC EBP //'E'
DEC ESI //'N'
INC ESP //'D'
end;
end;
function CallBack(w0, w1, w2 : DWORD; cbparam : Pointer) : DWORD;
begin
with form1 do
begin
PB.Position := Round(w1/CurFileSz*100);
ClearLog;
AddLog('Please wait...');
Application.ProcessMessages;
Result := aP_pack_continue;
end;
end;
function PackSection(source1:pointer; size:dword):pointer;
begin
form1.CurFileSz:=size;
form1.aPLib.Source := source1;
form1.aPLib.Length := size;
form1.aPlib.CallBack := @CallBack;
form1.aPLib.Pack;
form1.ClearLog;
PACKEDSECTION:= form1.aPLib.Length;
if form1.aPLib.Length = 0 then Exit;
form1.AddLog(' Size of section: '+inttostr(form1.CurFileSz)+' byte(s)');
form1.AddLog('Packed of section: '+inttostr(PACKEDSECTION)+' byte(s)');
form1.AddLog(' Size of depacker: '+inttostr(GetLoaderSize(dword(@PE_Loader)))+' byte(s)');
form1.AddLog(FormatFloat(' Ratio: ##%', (packedsection*100)/form1.CurFileSz));
result:=form1.aPLib.Destination;
end;
procedure InsertString(where:pointer; str:string; offs:dword);
var writ:cardinal;
begin
asm
mov eax, where
add eax, offs
mov where, eax
end;
WriteProcessMemory(GetCurrentProcess(),where,pointer(str),length(str),writ);
end;
procedure InsertBytes(where:pointer; to1:string; size:dword; offs:dword);
var writ:cardinal;
begin
asm
mov eax, where
add eax, offs
mov where, eax
end;
WriteProcessMemory(GetCurrentProcess(),where,pointer(to1),size,writ);
end;
function Reversed(slovo:dword):dword; assembler;
asm
mov eax, slovo
XCHG AL,AH
ROL EAX,16
XCHG AL,AH
mov result, eax
end;
procedure TForm1.packbuttonClick(Sender: TObject);
var
wr:cardinal;
FS: TFileStream;
jk: integer;
begin
if (form1.fileedit.Text='') or (fileexists(form1.fileedit.Text)=false) then
begin
ClearLog;
AddLog('Cannot open file!');
Exit;
end;
//
FS:=TFileStream.Create(fileedit.Text,fmOpenRead);
jk:=FS.Size;
FS.Free;
//
hFile:=CreateFileA(pchar(form1.fileedit.Text), GENERIC_READ + GENERIC_WRITE, FILE_SHARE_READ + FILE_SHARE_WRITE, NIL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if hFile=INVALID_HANDLE_VALUE then
begin
ClearLog;
AddLog('Cannot open file!');
Exit;
end;
ReadFile(hFile,EXE,2,bread,NIL);
if EXE<>$5A4D then
begin
CloseHandle(hFile);
Exit;
end;
SetFilePointer(hFile,$3C,NIL,FILE_BEGIN);
ReadFile(hFile,e_lfanew,4,bread,NIL);
SetFilePointer(hFile,e_lfanew,NIL,FILE_BEGIN);
ReadFile(hFile,PE_HEADER,SizeOF(PE_HEADER),bread,NIL);
if PE_HEADER.IMAGE_NT_SIGNATURE<>$00004550 then
begin
ClearLog;
AddLog('Invalid executable file !');
CloseHandle(hFile);
Exit;
end;
for i:=1 to PE_HEADER.FILE_HEADER.NumberOfSections Do
ReadFile(hFile,SECTION_HEADER[i],SizeOF(Section),bread,NIL);
form1.StatusBar1.Panels.Items[0].Text:='Packing....';
ClearLog;
epreal:=PE_HEADER.OPTIONAL_HEADER.AddressOfEntryPoint+PE_HEADER.OPTIONAL_HEADER.ImageBase;
ImageBase:=PE_HEADER.OPTIONAL_HEADER.ImageBase;
EP := RVA2Offset(epreal - ImageBase);
num:=PE_HEADER.FILE_HEADER.NumberOfSections;
fa:=PE_HEADER.OPTIONAL_HEADER.FileAlignment;
sa:=PE_HEADER.OPTIONAL_HEADER.SectionAlignment;
// SECTION_HEADER[num].SizeOfRawData:=FileSize(fileedit.Text)-SECTION_HEADER[num].PointerToRawData;
SECTION_HEADER[num].SizeOfRawData:=jk-SECTION_HEADER[num].PointerToRawData;
SECTION_HEADER[num].VirtualSize:=SECTION_HEADER[num].SizeOfRawData;
// Adding depacker section
PE_HEADER.FILE_HEADER.NumberOfSections:=PE_HEADER.FILE_HEADER.NumberOfSections+1;
SECTION_HEADER[num+1].Name:='.data';
SECTION_HEADER[num+1].Characteristics:=$C0000040; // NOT EXECUTABLE!
SECTION_HEADER[num+1].PointerToRawData:=((SECTION_HEADER[num].PointerToRawData+SECTION_HEADER[num].SizeOfRawData+fa-1) div fa)*fa;
SECTION_HEADER[num+1].VirtualAddress:=((SECTION_HEADER[num].VirtualAddress+SECTION_HEADER[num].VirtualSize+sa-1) div sa)*sa;
SECTION_HEADER[num+1].VirtualSize:=$400;
SECTION_HEADER[num+1].SizeOfRawData:=$400;
PE_HEADER.OPTIONAL_HEADER.SizeOfImage:=SECTION_HEADER[num+1].VirtualAddress+SECTION_HEADER[num+1].VirtualSize;
ns:= SECTION_HEADER[num].PointerToRawData+SECTION_HEADER[num].SizeOfRawData;
nv:=SECTION_HEADER[num+1].VirtualAddress;
for i:=1 to PE_HEADER.FILE_HEADER.NumberOfSections do
begin
if (ep>=SECTION_HEADER[i].PointerToRawData)and
(ep<(SECTION_HEADER[i].SizeOfRawData+SECTION_HEADER[i].PointerToRawData)) then begin
epsec:=i; break;
end;
end;
DEPBEGIN:=nv+imagebase;
sizeofsec:=SECTION_HEADER[1].SizeOfRawData;
iatrva:=PE_HEADER.OPTIONAL_HEADER.IMAGE_DIRECTORY_ENTRIES.IMPORT.VirtualAddress;
// Writing Loader data //
// REALLY LAME METHOD //
// DONT USE iT! //
stra:='1234';
InsertString(@PE_Loader,'GlobalAlloc',179);
InsertString(@PE_Loader,'GlobalFree',191);
// Write number of sections
// Push Kernel32
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, $54
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$101);
// mov eax, GetModuleHandleA
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, $48
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$106);
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, 179
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$10D);
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, $44
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$113);
// push section size
asm
mov eax, stra
mov ebx, sizeofsec
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$11A);
// save globalalloc address
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, 202
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$124);
// mov edi, SECTION_HEADER[1].PointerToRawData
addrsec:=SECTION_HEADER[1].VirtualAddress+imagebase;
asm
mov eax, stra
mov ebx, addrsec
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$12B);
// mov ecx, sizeofsec
asm
mov eax, stra
mov ebx, sizeofsec
sub ebx, 4
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$1C8);
// loop addr
asm
mov eax, stra
mov ebx, addrsec
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$1D1);
// write imagebase
asm
mov eax, stra
mov ebx, imagebase
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$1DA);
// original iat rva
asm
mov eax, stra
mov ebx, iatrva
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$1DF);
// mov eax, GetModuleHandle
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, $48
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$1F6);
// LoadLibraryA
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, $4C
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$202);
// mov somebuf1
asm
mov eax, stra
mov ebx, DEPBEGIN
add ebx, 206
mov [eax], ebx
end;
InsertBytes(@PE_Loader,stra,4,$20A);