我在互联网上找到了这段代码,但它说要在Windows XP上运行。我尝试在 Windows 7 上运行它并且它有效,但我想知道它是否安全,不仅运行此代码,而且在 Windows 7 上运行。
//
// Self-deleting exe under Windows XP
//
#include <windows.h>
#include <tchar.h>
// get this right!
#define EXPLORER_PID 1444
typedef UINT (WINAPI * WAIT_PROC)(HANDLE, DWORD); // WaitForSingleObject
typedef BOOL (WINAPI * CLOSE_PROC)(HANDLE); // CloseHandle
typedef BOOL (WINAPI * DELETE_PROC)(LPCTSTR); // DeleteFile
typedef VOID (WINAPI * EXIT_PROC)(DWORD); // ExitProcess
typedef struct
{
WAIT_PROC fnWaitForSingleObject;
CLOSE_PROC fnCloseHandle;
DELETE_PROC fnDeleteFile;
EXIT_PROC fnExitProcess;
HANDLE hProcess;
TCHAR szFileName[MAX_PATH];
} INJECT;
#pragma optimize("gsy", off)
#pragma check_stack(off) // doesn't work :-(
DWORD WINAPI RemoteThread(INJECT *remote)
{
remote->fnWaitForSingleObject(remote->hProcess, INFINITE);
remote->fnCloseHandle(remote->hProcess);
remote->fnDeleteFile(remote->szFileName);
remote->fnExitProcess(0);
return 0;
}
#pragma check_stack
HANDLE GetRemoteProcess()
{
STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;
//return OpenProcess(PROCESS_ALL_ACCESS, FALSE, EXPLORER_PID);
if(CreateProcess(0, "explorer.exe", 0, 0, FALSE, CREATE_SUSPENDED|CREATE_NO_WINDOW|IDLE_PRIORITY_CLASS, 0, 0, &si, &pi))
{
CloseHandle(pi.hThread);
return pi.hProcess;
}
else
{
return 0;
}
}
PVOID GetFunctionAddr(PVOID func)
{
#ifdef _DEBUG
// get address of function from the JMP <relative> instruction
DWORD *offset = (BYTE *)func + 1;
return (PVOID)(*offset + (BYTE *)func + 5);
#else
return func;
#endif
}
BOOL SelfDelete()
{
INJECT local, *remote;
BYTE *code;
HMODULE hKernel32;
HANDLE hRemoteProcess;
HANDLE hCurProc;
DWORD dwThreadId;
HANDLE hThread = 0;
char ach[80];
hRemoteProcess = GetRemoteProcess();
if(hRemoteProcess == 0)
return FALSE;
// Allocate memory in remote process
code = VirtualAllocEx(hRemoteProcess, 0, sizeof(INJECT) + 128, MEM_RESERVE|MEM_COMMIT, PAGE_EXECUTE_READWRITE);
if(code == 0)
{
CloseHandle(hRemoteProcess);
return FALSE;
}
hKernel32 = GetModuleHandle(_T("kernel32.dll"));
// setup remote structure
remote = (INJECT *)(code + 128);
local.fnWaitForSingleObject = (WAIT_PROC)GetProcAddress(hKernel32, "WaitForSingleObject");
local.fnCloseHandle = (CLOSE_PROC)GetProcAddress(hKernel32, "CloseHandle");
local.fnExitProcess = (EXIT_PROC)GetProcAddress(hKernel32, "ExitProcess");
#ifdef UNICODE
local.fnDeleteFile = (DELETE_PROC)GetProcAddress(hKernel32, "DeleteFileW");
#else
local.fnDeleteFile = (DELETE_PROC)GetProcAddress(hKernel32, "DeleteFileA");
#endif
// duplicate our own process handle for remote process to wait on
hCurProc = GetCurrentProcess();
DuplicateHandle(hCurProc, hCurProc, hRemoteProcess, &local.hProcess, 0, FALSE, DUPLICATE_SAME_ACCESS);
// find name of current executable
GetModuleFileName(NULL, local.szFileName, MAX_PATH);
// write in code to execute, and the remote structure
WriteProcessMemory(hRemoteProcess, code, GetFunctionAddr(RemoteThread), 128, 0);
WriteProcessMemory(hRemoteProcess, remote, &local, sizeof(local), 0);
wsprintf(ach, "%x %xn", code, remote);
OutputDebugString(ach);
// execute the code in remote process
hThread = CreateRemoteThread(hRemoteProcess, 0, 0, code, remote, 0, &dwThreadId);
if(hThread != 0)
{
CloseHandle(hThread);
}
return TRUE;
}
int main(void)
{
SelfDelete();
return 0;
}
顺便问一下,这怎么能用作 C/C++ 中的库?我的目标是,例如,
#include "selfdel.h"
这样我就可以只使用C++程序中SelfDelete()
函数。
你应该意识到这段代码是什么。它是将代码注入到另一个进程中,该进程将作为该进程执行,然后该进程将退出。它应该可以正常工作(尽管请查看下面的评论)。我认为这个代码片段的作者在 Win Vista 发布之前就已经写好了它,因此您有顾虑。
您可以在"selfdel.h"中声明SelfDelete()
。调用此函数并立即退出应该可以解决问题。
该实现不需要库用户的任何输入,因为它可以获得所需的一切。
// duplicate our own process handle for remote process to wait on
hCurProc = GetCurrentProcess();
...
// find name of current executable
GetModuleFileName(NULL, local.szFileName, MAX_PATH);
一些评论:
- 您的进程应具有足够的权限来创建另一个进程
- 此类活动可能会被防病毒软件视为可疑
- 不要忘记,只要您的进程在调用
SelfDelete()
后仍然存在,"僵尸"进程就会等待 - 考虑其他方法:程序如何删除自己的可执行文件