C++ 反调试(NtSetInformationThread)
参考 https://blog.csdn.net/Simon798/article/details/103161482
先上代码:
// Test_Console.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <afx.h>
#include <tchar.h>
#include <afxwin.h>
#include <Windows.h>
#include <vector>
#include <iostream>
#include <assert.h>
#include <psapi.h>
#include <tlhelp32.h>
#include <WtsApi32.h>
#include <locale.h>
#include <ShObjIdl.h>
#include <stdio.h>
#include <fstream>
#include <string>
#include<thread>
using namespace std;
#pragma region 依赖
typedef enum _THREADINFOCLASS {
ThreadBasicInformation,
ThreadTimes,
ThreadPriority,
ThreadBasePriority,
ThreadAffinityMask,
ThreadImpersonationToken,
ThreadDescriptorTableEntry,
ThreadEnableAlignmentFaultFixup,
ThreadEventPair_Reusable,
ThreadQuerySetWin32StartAddress,
ThreadZeroTlsCell,
ThreadPerformanceCount,
ThreadAmILastThread,
ThreadIdealProcessor,
ThreadPriorityBoost,
ThreadSetTlsArrayAddress,
ThreadIsIoPending,
ThreadHideFromDebugger,
ThreadBreakOnTermination,
MaxThreadInfoClass
} THREADINFOCLASS;
typedef NTSTATUS(WINAPI *NtSetInformationThreadPtr)(
HANDLE threadHandle,
THREADINFOCLASS threadInformationClass,
PVOID threadInformation,
ULONG threadInformationLength
);
// 反调试函数
void HideFromDebugger(){
HMODULE hNtDll = LoadLibrary(TEXT("ntdll.dll"));
NtSetInformationThreadPtr NtSetInformationThread = (NtSetInformationThreadPtr)GetProcAddress(hNtDll,"NtSetInformationThread");
NTSTATUS status = NtSetInformationThread(GetCurrentThread(),ThreadHideFromDebugger,NULL,0);
}
// 线程函数
void myThread(){
HideFromDebugger();
while(1){
cout << "hello" << endl;
Sleep(1000);
}
}
#pragma endregion
int _tmain(int argc, _TCHAR* argv[])
{
// 创建线程
thread thr(myThread);
thr.join();
getchar();
return 0;
}
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注意:这个函数一定要加上 WINAPI ,如果不加的话运行程序时就会出现以下错误:
解释起来就是,编译器不认识你定义的函数指针,因为你调用的dll函数是一个远函数,而且是一个C函数,你得告诉编译器它是个c函数才行。
效果图
1.正常打开,程序正常运行:
2.使用 vs 调试程序,在以下两处下断点,
启动调试,在 HideFromDebugger();
正常断下,
再次点击 继续 按钮,本应该在第二个断点处断下,但是程序调试结束了:
3.使用 x32dbg 附加进程,这里为了方便出发断点,我把代码做了一点修改:
(这样就可以在 x32dbg 里下 api 断点了)
void myThread(){
HideFromDebugger();
while(1){
//cout << "hello" << endl;
MessageBox(NULL,"","",NULL); // 改成 MessageBox
Sleep(10000); // 改成 10s
}
}
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当调试器出发 MessageBoxA 断点时,程序退出:
每天进步一点点 = =