109 lines
5.1 KiB
Python
109 lines
5.1 KiB
Python
from impacket.ldap import ldapasn1 as ldapasn1_impacket
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from impacket.ldap import ldap as ldap_impacket
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import re
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class CMEModule:
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'''
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Get description of users
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Module by @nodauf
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'''
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name = 'get-desc-users'
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description = 'Get description of the users. May contained password'
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supported_protocols = ['ldap']
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opsec_safe= True #Does the module touch disk?
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multiple_hosts = True #Does it make sense to run this module on multiple hosts at a time?
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def options(self, context, module_options):
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'''
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FILTER Apply the FILTER (grep-like) (default: '')
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PASSWORDPOLICY Is the windows password policy enabled ? (default: False)
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MINLENGTH Minimum password length to match, only used if PASSWORDPOLICY is True (default: 6)
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'''
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self.FILTER = ''
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self.MINLENGTH = '6'
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self.PASSWORDPOLICY = False
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if 'FILTER' in module_options:
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self.FILTER = module_options['FILTER']
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if 'MINLENGTH' in module_options:
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self.MINLENGTH = module_options['MINLENGTH']
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if 'PASSWORDPOLICY' in module_options:
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self.PASSWORDPOLICY = True
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self.regex = re.compile("((?=[^ ]*[A-Z])(?=[^ ]*[a-z])(?=[^ ]*\d)|(?=[^ ]*[a-z])(?=[^ ]*\d)(?=[^ ]*[^\w \n])|(?=[^ ]*[A-Z])(?=[^ ]*\d)(?=[^ ]*[^\w \n])|(?=[^ ]*[A-Z])(?=[^ ]*[a-z])(?=[^ ]*[^\w \n]))[^ \n]{"+self.MINLENGTH+",}") # Credit : https://stackoverflow.com/questions/31191248/regex-password-must-have-at-least-3-of-the-4-of-the-following
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def on_login(self, context, connection):
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'''Concurrent. Required if on_admin_login is not present. This gets called on each authenticated connection'''
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# Building the search filter
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searchFilter = "(objectclass=user)"
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try:
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context.log.debug('Search Filter=%s' % searchFilter)
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resp = connection.ldapConnection.search(searchFilter=searchFilter,
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attributes=['sAMAccountName','description'],
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sizeLimit=0)
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except ldap_impacket.LDAPSearchError as e:
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if e.getErrorString().find('sizeLimitExceeded') >= 0:
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context.log.debug('sizeLimitExceeded exception caught, giving up and processing the data received')
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# We reached the sizeLimit, process the answers we have already and that's it. Until we implement
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# paged queries
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resp = e.getAnswers()
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pass
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else:
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logging.debug(e)
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return False
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answers = []
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context.log.debug('Total of records returned %d' % len(resp))
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for item in resp:
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if isinstance(item, ldapasn1_impacket.SearchResultEntry) is not True:
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continue
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sAMAccountName = ''
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description = ''
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try:
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for attribute in item['attributes']:
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if str(attribute['type']) == 'sAMAccountName':
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sAMAccountName = str(attribute['vals'][0])
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elif str(attribute['type']) == 'description':
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description = attribute['vals'][0]
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if sAMAccountName != '' and description != '':
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answers.append([sAMAccountName,description])
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except Exception as e:
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context.log.debug("Exception:", exc_info=True)
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context.log.debug('Skipping item, cannot process due to error %s' % str(e))
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pass
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answers = self.filter_answer(context, answers)
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if len(answers) > 0:
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context.log.success('Found following users: ')
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for answer in answers:
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context.log.highlight(u'User: {} description: {}'.format(answer[0],answer[1]))
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def filter_answer(self, context, answers):
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# No option to filter
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if self.FILTER == '' and not self.PASSWORDPOLICY:
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context.log.debug("No filter option enabled")
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return answers
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answersFiltered = []
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context.log.debug("Prepare to filter")
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if len(answers) > 0:
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for answer in answers:
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conditionFilter = False
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description = str(answer[1])
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# Filter
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if self.FILTER != '':
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conditionFilter = False
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if self.FILTER in description:
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conditionFilter = True
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# Password policy
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if self.PASSWORDPOLICY:
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conditionPasswordPolicy = False
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if self.regex.search(description):
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conditionPasswordPolicy = True
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if (self.FILTER and conditionFilter and self.PASSWORDPOLICY and conditionPasswordPolicy):
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answersFiltered.append([answer[0],description])
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elif not self.FILTER and self.PASSWORDPOLICY and conditionPasswordPolicy:
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answersFiltered.append([answer[0],description])
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elif not self.PASSWORDPOLICY and self.FILTER and conditionFilter:
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answersFiltered.append([answer[0],description])
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return answersFiltered
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