这个是修改PE头骗过PEID的小工具。也就是大家通常所说的给程序添加花指令。原理非常简单，就是给EXE文件加一个PE头，然后写我们的“花指令”。如果你读懂过jingtao的“谈Delphi编程中流的应用”那篇文章的话。相信对这段代码不会陌生，因为这基本原理是一样的。只是代码中有几个数据结构可能是平时极少用到的，都是用来存放PE结构的变量。大家可以参考PE结构方面的资料。（其实看名字应该也能猜出个十有八九）注释我懒得写了，有问题直接跟贴。



unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    Bevel1: TBevel;
    Button3: TButton;
    OpenDialog1: TOpenDialog;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure obtain;
  private
    { Private declarations }
    FImageBase: DWORD;
  public
    { Public declarations }
  end;

  THEAD = array[0..63] of byte;

var
  Form1: TForm1;

const
  MYSECTION = 'Fi7ke';  //添加的节名，自定义
  JMPOFF = 43;  //花指令的机器码,Ollydbg加载后随便取
  OEPCODE: THEAD = ($55, $8B, $EC, $6A, $FF, $68, $2A, $2C, $0A, $00, $68, $38,
    $90, $0D, $00, $64, $A1, $00, $00, $00, $00, $50, $64, $89,
    $25, $00, $00, $00, $00, $58, $64, $A3, $00, $00, $00, $00,
    $58, $58, $58, $58, $8B, $E8, $B8, $00, $10, $40, $00, $FF,
    $E0, $90, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,
    $00, $00, $00, $00);

procedure AddSection(FName: string);

implementation

{$R *.dfm}

procedure AddSection(FName: string);
var
  DOSHEADER: IMAGE_DOS_HEADER;
  PEHEADER: IMAGE_NT_HEADERS;
  SectionHeader: IMAGE_SECTION_HEADER;
  MySectionHeader: IMAGE_SECTION_HEADER;
  fs: TFileStream;
  AddressOfEntryPoint: DWORD;
begin
  fs := TFileStream.Create(FName, fmOpenReadWrite +
    fmShareDenyWrite);
  try
    fs.Seek(0, soFromBeginning);
    fs.Read(DOSHEADER, sizeof(DOSHEADER));

    fs.Seek(DOSHEADER._lfanew, soFromBeginning);
    fs.Read(PEHEADER, sizeOf(PEHEADER));

    fs.Seek(sizeOf(SectionHeader) *
      (PEHEADER.FileHeader.NumberOfSections - 1), soFromCurrent);

    fs.Read(SectionHeader, sizeof(IMAGE_SECTION_HEADER));

    MySectionHeader.Name[0] := ord('F');
    MySectionHeader.Name[1] := ord('i');
    MySectionHeader.Name[2] := ord('7');
    MySectionHeader.Name[3] := ord('k');
    MySectionHeader.Name[4] := ord('e');
    MySectionHeader.Name[5] := 0;
    MySectionHeader.Name[6] := 0;
    MySectionHeader.Name[7] := 0;

    MySectionHeader.VirtualAddress := PEHEADER.OptionalHeader.SizeOfImage;
    MySectionHeader.Misc.VirtualSize := $200;
    MySectionHeader.SizeOfRawData := (MySectionHeader.VirtualAddress div
      PEHEADER.OptionalHeader.FileAlignment + 1) * PEHEADER.OptionalHeader.FileAlignment -
      PEHEADER.OptionalHeader.SizeOfImage;
    MySectionHeader.PointerToRawData :=
      SectionHeader.SizeOfRawData + SectionHeader.PointerToRawData;
    MySectionHeader.Characteristics := $E0000020;

    Inc(PEHEADER.FileHeader.NumberOfSections);
    fs.Write(MySectionHeader, sizeOf(MySectionHeader));

    fs.Seek(DOSHEADER._lfanew, soFromBeginning);

    AddressOfEntryPoint := PEHEADER.OptionalHeader.AddressOfEntryPoint;

    PEHEADER.OptionalHeader.AddressOfEntryPoint :=
      MySectionHeader.VirtualAddress;

    PEHEADER.OptionalHeader.MajorLinkerVersion := 7;
    PEHEADER.OptionalHeader.MinorLinkerVersion := 0;
    AddressOfEntryPoint := AddressOfEntryPoint +
      PEHEADER.OptionalHeader.ImageBase;

    asm   //这里说明一下，这是嵌入的汇编代码,寄存器—CPU暂时储存数据的东西，比内存更快，以提高效率
      PUSHAD
      LEA eax, OEPCODE  //将OEPCODE的地址交给寄存器
      ADD eax, JMPOFF   添加JMPOFF值给寄存器

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