#!/usr/bin/python2
# Copyright (c) 2012-2016 CORE Security Technologies
#
# This software is provided under under a slightly modified version
# of the Apache Software License. See the accompanying LICENSE file
# for more information.
#
# DCE/RPC lookup sid brute forcer example
#
# Author:
#  Alberto Solino (@agsolino)
#
# Reference for:
#  DCE/RPC [MS-LSAT]

import sys
import logging
import argparse
import codecs

from impacket.examples import logger
from impacket import version
from impacket.dcerpc.v5 import transport, lsat, lsad
from impacket.dcerpc.v5.samr import SID_NAME_USE
from impacket.dcerpc.v5.dtypes import MAXIMUM_ALLOWED
from impacket.dcerpc.v5.rpcrt import DCERPCException


class LSALookupSid:
    KNOWN_PROTOCOLS = {
        '139/SMB': (r'ncacn_np:%s[\pipe\lsarpc]', 139),
        '445/SMB': (r'ncacn_np:%s[\pipe\lsarpc]', 445),
        '135/TCP': (r'ncacn_ip_tcp:%s', 135),
        }

    def __init__(self, username, password, domain, protocols = None,
                 hashes = None, maxRid=4000):
        if not protocols:
            protocols = LSALookupSid.KNOWN_PROTOCOLS.keys()

        self.__username = username
        self.__password = password
        self.__protocols = [protocols]
        self.__maxRid = int(maxRid)
        self.__domain = domain
        self.__lmhash = ''
        self.__nthash = ''
        if hashes is not None:
            self.__lmhash, self.__nthash = hashes.split(':')

    def dump(self, addr):

        logging.info('Brute forcing SIDs at %s' % addr)

        # Try all requested protocols until one works.
        for protocol in self.__protocols:
            protodef = LSALookupSid.KNOWN_PROTOCOLS[protocol]
            port = protodef[1]

            logging.info("Trying protocol %s..." % protocol)
            stringbinding = protodef[0] % addr

            rpctransport = transport.DCERPCTransportFactory(stringbinding)
            rpctransport.set_dport(port)
            if hasattr(rpctransport, 'set_credentials'):
                # This method exists only for selected protocol sequences.
                rpctransport.set_credentials(self.__username, self.__password, self.__domain, self.__lmhash, self.__nthash)

            try:
                self.__bruteForce(rpctransport, self.__maxRid)
            except Exception, e:
                #import traceback
                #print traceback.print_exc()
                logging.critical(str(e))
                raise
            else:
                # Got a response. No need for further iterations.
                break

    def __bruteForce(self, rpctransport, maxRid):
        dce = rpctransport.get_dce_rpc()
        entries = []
        dce.connect()

        # Want encryption? Uncomment next line
        # But make SIMULTANEOUS variable <= 100
        #dce.set_auth_level(ntlm.NTLM_AUTH_PKT_PRIVACY)

        # Want fragmentation? Uncomment next line
        #dce.set_max_fragment_size(32)

        dce.bind(lsat.MSRPC_UUID_LSAT)
        resp = lsat.hLsarOpenPolicy2(dce, MAXIMUM_ALLOWED | lsat.POLICY_LOOKUP_NAMES)
        policyHandle = resp['PolicyHandle']

        resp = lsad.hLsarQueryInformationPolicy2(dce, policyHandle, lsad.POLICY_INFORMATION_CLASS.PolicyAccountDomainInformation)

        domainSid = resp['PolicyInformation']['PolicyAccountDomainInfo']['DomainSid'].formatCanonical()

        soFar = 0
        SIMULTANEOUS = 1000
        for j in range(maxRid/SIMULTANEOUS+1):
            if (maxRid - soFar) / SIMULTANEOUS == 0:
                sidsToCheck = (maxRid - soFar) % SIMULTANEOUS
            else: 
                sidsToCheck = SIMULTANEOUS
 
            if sidsToCheck == 0:
                break

            sids = list()
            for i in xrange(soFar, soFar+sidsToCheck):
                sids.append(domainSid + '-%d' % i)
            try:
                lsat.hLsarLookupSids(dce, policyHandle, sids,lsat.LSAP_LOOKUP_LEVEL.LsapLookupWksta)
            except DCERPCException, e:
                if str(e).find('STATUS_NONE_MAPPED') >= 0:
                    soFar += SIMULTANEOUS
                    continue
                elif str(e).find('STATUS_SOME_NOT_MAPPED') >= 0:
                    resp = e.get_packet()
                else: 
                    raise

            for n, item in enumerate(resp['TranslatedNames']['Names']):
                if item['Use'] != SID_NAME_USE.SidTypeUnknown:
                    print "%d: %s\\%s (%s)" % (
                    soFar + n, resp['ReferencedDomains']['Domains'][item['DomainIndex']]['Name'], item['Name'],
                    SID_NAME_USE.enumItems(item['Use']).name)
            soFar += SIMULTANEOUS

        dce.disconnect()

        return entries


# Process command-line arguments.
if __name__ == '__main__':
    # Init the example's logger theme
    logger.init()
    # Explicitly changing the stdout encoding format
    if sys.stdout.encoding is None:
        # Output is redirected to a file
        sys.stdout = codecs.getwriter('utf8')(sys.stdout)
    print version.BANNER

    parser = argparse.ArgumentParser()

    parser.add_argument('target', action='store', help='[[domain/]username[:password]@]<targetName or address>')
    parser.add_argument('maxRid', action='store', default = '4000', nargs='?', help='max Rid to check (default 4000)')
    parser.add_argument('protocol', choices=LSALookupSid.KNOWN_PROTOCOLS.keys(), nargs='?', default='445/SMB', help='transport protocol (default 445/SMB)')

    group = parser.add_argument_group('authentication')

    group.add_argument('-hashes', action="store", metavar = "LMHASH:NTHASH", help='NTLM hashes, format is LMHASH:NTHASH')

    if len(sys.argv)==1:
        parser.print_help()
        sys.exit(1)

    options = parser.parse_args()

    import re

    domain, username, password, address = re.compile('(?:(?:([^/@:]*)/)?([^@:]*)(?::([^@]*))?@)?(.*)').match(
        options.target).groups('')

    #In case the password contains '@'
    if '@' in address:
        password = password + '@' + address.rpartition('@')[0]
        address = address.rpartition('@')[2]

    if domain is None:
        domain = ''

    if password == '' and username != '' and options.hashes is None:
        from getpass import getpass
        password = getpass("Password:")

    lookup = LSALookupSid(username, password, domain, options.protocol, options.hashes, options.maxRid)
    try:
        lookup.dump(address)
    except:
        pass
