词条 | 注入线程 |
释义 | 在基于黑客软件、杀毒软件、系统应用软件开发过程中,需要使用一种方式:将外部DLL通过线程形式注入到其他进程中。这样的过程就叫注入线程或者叫线程注入。 首先你需要编写一个待注入的DLL文件,假如是d.dll. 以下示例是Delphi代码。 unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls,tlhelp32; type TForm1 = class(TForm) Button3: TButton; Edit1: TEdit; Label1: TLabel; procedure Button3Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form1: TForm1; implementation {$R *.dfm} { 列举进程 } procedure GetMyProcessID(const AFilename: string; const PathMatch: Boolean; var ProcessID: DWORD); var tpe: TProcessEntry32; SsHandle: Thandle; FoundAProc, FoundOK: boolean; begin ProcessID :=0; { 创建系统快照 } SsHandle := CreateToolHelp32SnapShot(TH32CS_SnapProcess, 0); { 取得快照中的第一个进程 } { 一定要设置结构的大小,否则将返回False } tpe.dwSize := sizeof(TProcessEntry32); FoundAProc := Process32First(Sshandle, tpe); while FoundAProc do begin { 进行匹配 } if PathMatch then FoundOK := AnsiStricomp(tpe.szExefile, PChar(AFilename)) = 0 else FoundOK := AnsiStricomp(PChar(ExtractFilename(tpe.szExefile)), PChar(ExtractFilename(AFilename))) = 0; if FoundOK then begin ProcessID := tpe . th32ProcessID; break; end; { 未找到,继续下一个进程 } FoundAProc := Process32Next(SsHandle, tpe); end; CloseHandle(SsHandle); end; { 设置权限 } function EnabledDebugPrivilege(const Enabled : Boolean) : Boolean; var hTk : THandle; { 打开令牌句柄 } rtnTemp : Dword; { 调整权限时返回的值 } TokenPri : TOKEN_PRIVILEGES; const SE_DEBUG = 'SeDebugPrivilege'; { 查询值 } begin Result := False; { 获取进程令牌句柄,设置权限 } if (OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES,hTk)) then begin TokenPri.PrivilegeCount := 1; { 获取Luid值 } LookupPrivilegeValue(nil,SE_DEBUG,TokenPri.Privileges[0].Luid); if Enabled then TokenPri.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED else TokenPri.Privileges[0].Attributes := 0; rtnTemp := 0; { 设置新的权限 } AdjustTokenPrivileges(hTk,False,TokenPri,sizeof(TokenPri),nil,rtnTemp); Result := GetLastError = ERROR_SUCCESS; CloseHandle(hTk); end; end; { 注入远程进程 } function InjectTo(const Host, Guest: string; const PID: DWORD = 0): DWORD; var { 被注入的进程句柄,进程ID} hRemoteProcess: THandle; dwRemoteProcessId: DWORD; { 写入远程进程的内容大小 } memSize: DWORD; { 写入到远程进程后的地址 } pszLibFileRemote: Pointer; iReturnCode: Boolean; TempVar: DWORD; { 指向函数LoadLibraryW的地址 } pfnStartAddr: TFNThreadStartRoutine; { dll全路径,需要写到远程进程的内存中去 } pszLibAFilename: PwideChar; begin Result := 0; { 设置权限 } EnabledDebugPrivilege(True); { 为注入的dll文件路径分配内存大小,由于为WideChar,故要乘2 } Getmem(pszLibAFilename, Length(Guest) * 2 + 1); StringToWideChar(Guest, pszLibAFilename, Length(Guest) * 2 + 1); { 获取进程ID } if PID > 0 then dwRemoteProcessID := PID else GetMyProcessID(Host, False, dwRemoteProcessID); { 取得远程进程句柄,具有写入权限} if(dwRemoteProcessID<=0 ) then begin ShowMessage('没找到进程'); exit; end; hRemoteProcess := OpenProcess(PROCESS_CREATE_THREAD + {允许远程创建线程} PROCESS_VM_OPERATION + {允许远程VM操作} PROCESS_VM_WRITE, {允许远程VM写} FALSE, dwRemoteProcessId); { 用函数VirtualAllocex在远程进程分配空间,并用WriteProcessMemory中写入dll路径 } memSize := (1 + lstrlenW(pszLibAFilename)) * sizeof(WCHAR); pszLibFileRemote := PWIDESTRING(VirtualAllocEx(hRemoteProcess, nil, memSize, MEM_COMMIT, PAGE_READWRITE)); TempVar := 0; iReturnCode := WriteProcessMemory(hRemoteProcess, pszLibFileRemote, pszLibAFilename, memSize, TempVar); if iReturnCode then begin pfnStartAddr := GetProcAddress(GetModuleHandle('Kernel32'), 'LoadLibraryW'); TempVar := 0; { 在远程进程中启动dll } Result := CreateRemoteThread(hRemoteProcess, nil, 0, pfnStartAddr, pszLibFileRemote, 0, TempVar); end; { 释放内存空间 } Freemem(pszLibAFilename); end; { 测试 } procedure TForm1.Button3Click(Sender: TObject); begin InjectTo(edit1.Text, extractfilepath(paramstr(0))+'d.dll'); end; end. |
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