DLL注入
刚刚整理的代码注入(远程线程注入)现在整理这个DLL注入,DLL注入比较常用,相比远程代码注入DLL注入没有什么太多的限制,而且实现起来比较简单,当然远程线程需要注意的问题DLL很多情况都需要注意,这里不做重复,只说代码注入里面没有说过的部分。DLL注入的方式不唯一,比如你如果完全看懂了代码注入,那么你直接LoadLibrary地址和一个dll路径传进去然后在里面load一下就行了,也就是之前的代码注入完全可以实现dll注入,今天就说下一通常dll的注入方式吧,通常dll的注入比我刚刚说的那个方法还要简单,流程和代码注入差不多但是简单了很多,思路是这样,LoadLibrary这个函数所有的进程都是地址一样,我们直接获取LoadLibrary的地址,然后在CreateRemoteThread里面直接把这个地址作为线程地址传过去,然后参数就是我们已经拷贝到对方内存里的那个字符串,这样直接就跑起来了,非常简单,在DLL里想干什么就干什么,可以和本地写代码一样,然后还有一个问题,就是注意一下,dll在入口的switch里面的第一个分支直接调用你想干的事就行了,那个分支的意思就是说当dll被第一次载入的时候就自动执行了,OK就这么简单,如果你觉得没听懂,那么需要看我之前说的那个代码注入,这个里面只说了新的东西,还有就是dll注入应该注意的几个地方:
1.dll的入口记得就调用自己的函数,别走正当的流程,如果你非蛋疼的想调用某个指定函数,当然可以用代码注入结合dll注入的方式,但是 然并卵。
2.注意系统问题,32exe+32dll注入32位程序,64exe+64dll注入64位程序。
3.加入你注入了QQ,发现第一次注入成功了,但是第二次注入代码没报错,但是么执行自己想要的,什么情况?,原因在于同一个dll被加同一个程序加载两次的时候,第二次不会加载,给优化掉了,把QQ关了重开就行,或者自己找到某个地方free掉自己的dll。OK一共就这些,接下来是我封装好的一个DLL调用库,没有写的很细,如果是使用建议简单修改整理(我写了测试例子,在这里http://download.csdn.net/detail/u013761036/9603051)。
.H
#pragma once
#include <Windows.h>
#include <stdlib.h>
#include <tlhelp32.h>
#include <Psapi.h>
#include <string>
using std::string;
using std::wstring;
#pragma comment (lib,"Psapi.lib")
#pragma warning(disable:4996)
class CInstDll
{
private:
bool AdjustProcessTokenPrivilege();
bool Camp2str(wstring wsStrA ,wstring wsStrB);
DWORD GetProcessIdByName(const wstring &wsProcessName);
std::string ws2s(const std::wstring& s_src,UINT CodePage = CP_ACP);
std::wstring s2ws( const std::string& s_src,UINT CodePage = CP_ACP);
public:
bool InjectionDll2ProA(const string &strPorcessName ,const string &strDllPath);
bool InjectionDll2ProW(const wstring &wsPorcessName ,const wstring &wsDllPath);
};
.CPP
#include "stdafx.h"
#include "InstDll.h"
bool CInstDll::AdjustProcessTokenPrivilege()
{
LUID luidTmp;
HANDLE hToken;
TOKEN_PRIVILEGES tkp;
if(!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
return false;
if(!LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &luidTmp))
{
CloseHandle(hToken);
return FALSE;
}
tkp.PrivilegeCount = 1;
tkp.Privileges[0].Luid = luidTmp;
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if(!AdjustTokenPrivileges(hToken, FALSE, &tkp, sizeof(tkp), NULL, NULL))
{
CloseHandle(hToken);
return FALSE;
}
return true;
}
bool CInstDll::Camp2str(wstring wsStrA ,wstring wsStrB)
{
int nSize = wsStrA.length();
for(int i = 0 ;i < nSize ;i ++)
{
if(wsStrA[i] >= 'A' && wsStrA[i] <= 'Z')
wsStrA[i] += 'a'- 'A';
}
nSize = wsStrB.length();
for(int i = 0 ;i < nSize ;i ++)
{
if(wsStrB[i] >= 'A' && wsStrB[i] <= 'Z')
wsStrB[i] += 'a'- 'A';
}
return wsStrA == wsStrB;
}
DWORD CInstDll::GetProcessIdByName(const wstring &wsProcessName)
{
HANDLE hProcess = 0;
DWORD dwProcess[2048] ,dwNeeded;
TCHAR tcProcName[MAX_PATH] = {0};
wstring wsNowProcessName = L"";
int nTempSize = 0;
int nPos = 0;
EnumProcesses(dwProcess, sizeof(dwProcess), &dwNeeded);
for(int i = 0 ;i < dwNeeded / sizeof(DWORD) ;i++)
{
if(0 != dwProcess[i])
{
hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, dwProcess[i]);
GetModuleFileNameEx(hProcess, NULL, tcProcName, MAX_PATH);
nPos = wstring(tcProcName).find_last_of(L'\\');
if(nPos != wstring::npos)
{
wsNowProcessName = wstring(wstring(tcProcName).substr(nPos + 1));
if(Camp2str(wsProcessName ,wsNowProcessName))
{
DWORD aa = dwProcess[i];
return aa;
}
//if(wsProcessName == wsNowProcessName)
// return dwProcess[i];
}
}
}
return 0;
}
std::string CInstDll::ws2s(const std::wstring& wide, UINT CodePage)
{
int wide_length = static_cast<int>(wide.length());
if (wide_length == 0)
return std::string();
// Compute the length of the buffer we'll need.
int charcount = WideCharToMultiByte(CodePage, 0, wide.data(), wide_length,
NULL, 0, NULL, NULL);
if (charcount == 0)
return std::string();
std::string mb;
mb.resize(charcount);
WideCharToMultiByte(CodePage, 0, wide.data(), wide_length,
&mb[0], charcount, NULL, NULL);
return mb;
}
std::wstring CInstDll::s2ws( const std::string& mb,UINT CodePage)
{
if (mb.empty())
return std::wstring();
int mb_length = static_cast<int>(mb.length());
// Compute the length of the buffer.
int charcount = MultiByteToWideChar(CodePage, 0,
mb.data(), mb_length, NULL, 0);
if (charcount == 0)
return std::wstring();
std::wstring wide;
wide.resize(charcount);
MultiByteToWideChar(CodePage, 0, mb.data(), mb_length, &wide[0], charcount);
return wide;
}
bool CInstDll::InjectionDll2ProW(const wstring &wsPorcessName ,const wstring &wsDllPath)
{
//1.提权
if(!AdjustProcessTokenPrivilege())
return false;
//2.获取pid
DWORD dwProPID = 0;
if((dwProPID = GetProcessIdByName(wsPorcessName)) == 0)
return false;
//3.打开进程
HANDLE hProcess = NULL;
if((hProcess=OpenProcess(PROCESS_ALL_ACCESS,FALSE ,dwProPID)) == NULL)
return false;
//4.初始化参数数据
PTHREAD_START_ROUTINE dwLoadLibraryAddress = (PTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")),"LoadLibraryA");
if(dwLoadLibraryAddress == 0)
return false;
char tcCache[MAX_PATH] = {0};
strcat(tcCache ,ws2s(wsDllPath).c_str());
//5.在宿主进程里分配内存,用于存参数
char *pPara = NULL;
pPara = (char *)VirtualAllocEx(hProcess , 0 ,sizeof(tcCache) ,MEM_COMMIT,PAGE_READWRITE);
if(pPara == NULL) return false;
//6.把参数写入宿主进程里,注意结构体的命名(_REMOTE_PARAMETER)
if(!WriteProcessMemory(hProcess ,pPara ,tcCache ,sizeof(tcCache) ,0))
return false;
//7.启动注入宿主进程的进程
DWORD dwThreadId = 0;
HANDLE hThread = CreateRemoteThread(hProcess ,0 ,0 ,dwLoadLibraryAddress ,pPara ,0 ,&dwThreadId);
if(!hThread) return false;
//9.等待线程结束,然后清理内存
WaitForSingleObject(hThread ,INFINITE);
CloseHandle(hThread);
VirtualFreeEx(hProcess ,pPara ,0 ,MEM_RELEASE);
CloseHandle(hProcess);
return true;
}
bool CInstDll::InjectionDll2ProA(const string &strPorcessName ,const string &strDllPath)
{
return InjectionDll2ProW(s2ws(strPorcessName) ,s2ws(strDllPath));
}
USER
#include "stdafx.h"
#include "InstDll.h"
int _tmain(int argc, _TCHAR* argv[])
{
CInstDll cIn;
//cIn.InjectionDll2ProW(L"qq.exe" ,L"c:\\MyFirstDll32.dll"); //"explorer.exe
cIn.InjectionDll2ProA("explorer.exe" ,"c:\\MyFirstDll64.dll"); //"explorer.exe
return 0;
}
我再把当时测试用的一个简单DLL代码贴出来吧
// dllmain.cpp : 定义 DLL 应用程序的入口点。
#include "stdafx.h"
void DoSomethings()
{
MessageBoxW(NULL ,L"do some things" ,L"T" ,MB_OK);
}
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
{
DoSomethings();
}break;
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
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