mirror of
https://github.com/volatilityfoundation/volatility3.git
synced 2026-08-28 10:49:42 +02:00
347 lines
13 KiB
Python
347 lines
13 KiB
Python
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from volatility.framework import interfaces, renderers
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from volatility.framework.configuration import requirements
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from volatility.framework.renderers import format_hints
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from volatility.plugins.windows.registry import hivelist
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from struct import unpack, pack
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from Crypto.Hash import MD5, MD4
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from Crypto.Cipher import ARC4, DES, AES
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import hashlib
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import binascii
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class Hashdump(interfaces.plugins.PluginInterface):
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"""Dumps user hashes from memory"""
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@classmethod
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def get_requirements(cls):
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return [requirements.TranslationLayerRequirement(name = 'primary',
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description = 'Memory layer for the kernel',
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architectures = ["Intel32", "Intel64"]),
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requirements.SymbolTableRequirement(name = "nt_symbols",
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description = "Windows kernel symbols"),
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requirements.PluginRequirement(name = 'hivelist', plugin = hivelist.HiveList, version = (1, 0, 0))
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]
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odd_parity = [
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1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14,
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16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31,
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32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47,
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49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62,
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64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79,
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81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94,
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97, 97, 98, 98, 100, 100, 103, 103, 104, 104, 107, 107, 109, 109, 110, 110,
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112, 112, 115, 115, 117, 117, 118, 118, 121, 121, 122, 122, 124, 124, 127, 127,
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128, 128, 131, 131, 133, 133, 134, 134, 137, 137, 138, 138, 140, 140, 143, 143,
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145, 145, 146, 146, 148, 148, 151, 151, 152, 152, 155, 155, 157, 157, 158, 158,
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161, 161, 162, 162, 164, 164, 167, 167, 168, 168, 171, 171, 173, 173, 174, 174,
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176, 176, 179, 179, 181, 181, 182, 182, 185, 185, 186, 186, 188, 188, 191, 191,
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193, 193, 194, 194, 196, 196, 199, 199, 200, 200, 203, 203, 205, 205, 206, 206,
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208, 208, 211, 211, 213, 213, 214, 214, 217, 217, 218, 218, 220, 220, 223, 223,
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224, 224, 227, 227, 229, 229, 230, 230, 233, 233, 234, 234, 236, 236, 239, 239,
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241, 241, 242, 242, 244, 244, 247, 247, 248, 248, 251, 251, 253, 253, 254, 254
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]
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# Permutation matrix for boot key
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p = [ 0x8, 0x5, 0x4, 0x2, 0xb, 0x9, 0xd, 0x3,
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0x0, 0x6, 0x1, 0xc, 0xe, 0xa, 0xf, 0x7 ]
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# Constants for SAM decrypt algorithm
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aqwerty = b"!@#$%^&*()qwertyUIOPAzxcvbnmQQQQQQQQQQQQ)(*@&%\0"
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anum = b"0123456789012345678901234567890123456789\0"
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antpassword = b"NTPASSWORD\0"
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almpassword = b"LMPASSWORD\0"
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lmkey = b"KGS!@#$%"
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empty_lm = "aad3b435b51404eeaad3b435b51404ee"
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empty_nt = "31d6cfe0d16ae931b73c59d7e0c089c0"
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#empty treegrid object to return in case of error
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none_obj = (0,('','','',''))
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#helper method to find a particular key in a hive
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def open_key(self, root, key):
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if key == []:
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return root
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keyname = key.pop(0)
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for s in root.get_subkeys():
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if s.get_name().upper() == keyname.upper():
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return self.open_key(s, key)
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return None
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def get_user_keys(self, samhive):
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user_key_path = ["SAM", "Domains", "Account", "Users"]
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root = samhive.root_cell_offset
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if not root:
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return []
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user_key = self.open_key(samhive.get_node(root), user_key_path)
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if not user_key:
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return []
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return [k for k in user_key.get_subkeys() if k.Name != "Names"]
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def get_bootkey(self, syshive):
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cs =1
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lsa_base = ["ControlSet{0:03}".format(cs), "Control", "Lsa"]
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lsa_keys = ["JD", "Skew1", "GBG", "Data"]
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root = syshive.root_cell_offset
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if not root:
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return None
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lsa = self.open_key(syshive.get_node(root), lsa_base)
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if not lsa:
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return None
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bootkey = ""
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for lk in lsa_keys:
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key = self.open_key(lsa, [lk])
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class_data = syshive.read(key.Class+4, key.ClassLength)
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if class_data == None:
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return ""
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bootkey += class_data.decode('utf-16-le')
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bootkey_str=''.join([chr(int(''.join(c), 16)) for c in zip(bootkey[0::2],bootkey[1::2])])
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bootkey_scrambled = ""
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for i in range(len(bootkey_str)):
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bootkey_scrambled += bootkey_str[self.p[i]]
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return bootkey_scrambled
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def get_hbootkey(self, samhive, bootkey):
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sam_account_path = ["SAM", "Domains", "Account"]
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if not bootkey:
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return None
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root = samhive.root_cell_offset
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if not root:
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return None
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sam_account_key = self.open_key(samhive.get_node(root), sam_account_path)
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if not sam_account_key:
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return None
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F = None
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for v in sam_account_key.get_values():
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if v.get_name() == 'F':
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F = samhive.read(v.Data+4, v.DataLength)
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if not F:
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return None
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revision = F[0x00]
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if revision == 2:
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md5 = hashlib.md5()
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md5.update(F[0x70:0x80] + self.aqwerty + bootkey.encode('latin1') + self.anum)
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rc4_key = md5.digest()
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rc4 = ARC4.new(rc4_key)
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hbootkey = rc4.encrypt(F[0x80:0xA0])
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return hbootkey
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elif revision == 3:
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# AES encrypted
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iv = F[0x78:0x88]
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encryptedHBootKey = F[0x88:0xA8]
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cipher = AES.new(bootkey.encode('latin1'), AES.MODE_CBC, iv)
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hbootkey = cipher.decrypt(encryptedHBootKey)
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return hbootkey[:16]
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else:
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return None
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return hbootkey
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def decrypt_single_salted_hash(self, rid, hbootkey, enc_hash, lmntstr, salt):
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if enc_hash == "":
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return ""
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(des_k1,des_k2) = self.sid_to_key(rid)
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d1 = DES.new(des_k1.encode('latin1'), DES.MODE_ECB)
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d2 = DES.new(des_k2.encode('latin1'), DES.MODE_ECB)
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cipher = AES.new(hbootkey[:16], AES.MODE_CBC, salt)
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obfkey = cipher.decrypt(enc_hash)
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return d1.decrypt(obfkey[:8]) + d2.decrypt(obfkey[8:16])
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def get_user_hashes(self, user, samhive, hbootkey):
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## Will sometimes find extra user with rid = NAMES, returns empty strings right now
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try:
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rid = int(str(user.get_name()), 16)
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except ValueError:
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return None
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V = None
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for v in user.get_values():
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if v.get_name() == 'V':
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V = samhive.read(v.Data+4, v.DataLength)
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if not V:
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return None
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lm_offset = unpack("<L", V[0x9c:0xa0])[0] + 0xCC
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lm_len = unpack("<L", V[0xa0:0xa4])[0]
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nt_offset = unpack("<L", V[0xa8:0xac])[0] + 0xCC
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nt_len = unpack("<L", V[0xac:0xb0])[0]
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lm_revision = V[lm_offset + 2:lm_offset + 3]
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if lm_revision == b'\x01':
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lm_exists = True if lm_len == 20 else False
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enc_lm_hash = V[lm_offset + 0x04:lm_offset + 0x14] if lm_exists else ""
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lmhash = self.decrypt_single_hash(rid, hbootkey, enc_lm_hash, self.almpassword)
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elif lm_revision == b'\x02':
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lm_exists = True if lm_len == 56 else False
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lm_salt = V[hash_offset+4:hash_offset+20] if lm_exists else ""
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enc_lm_hash = V[hash_offset+20:hash_offset+52] if lm_exists else ""
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lmhash = self.decrypt_single_salted_hash(rid, hbootkey, enc_lm_hash, self.almpassword, lm_salt)
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# NT hash decryption
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nt_len = unpack("<L", V[0xac:0xb0])[0]
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nt_revision = V[nt_offset + 2:nt_offset + 3]
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if nt_revision == b'\x01':
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nt_exists = True if nt_len == 20 else False
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enc_nt_hash = V[nt_offset+4:nt_offset+20] if nt_exists else ""
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nthash = self.decrypt_single_hash(rid, hbootkey, enc_nt_hash, self.antpassword)
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elif nt_revision == b'\x02':
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nt_exists = True if nt_len == 56 else False
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nt_salt = V[nt_offset+8:nt_offset+24] if nt_exists else ""
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enc_nt_hash = V[nt_offset+24:nt_offset+56] if nt_exists else ""
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nthash = self.decrypt_single_salted_hash(rid, hbootkey, enc_nt_hash, self.antpassword, nt_salt)
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return lmhash, nthash
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def sid_to_key(self, sid):
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s1 = ""
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s1 += chr(sid & 0xFF)
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s1 += chr((sid >> 8) & 0xFF)
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s1 += chr((sid >> 16) & 0xFF)
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s1 += chr((sid >> 24) & 0xFF)
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s1 += s1[0]
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s1 += s1[1]
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s1 += s1[2]
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s2 = s1[3] + s1[0] + s1[1] + s1[2]
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s2 += s2[0] + s2[1] + s2[2]
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return self.str_to_key(s1), self.str_to_key(s2)
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def str_to_key(self, s):
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key = []
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key.append(ord(s[0]) >> 1)
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key.append(((ord(s[0]) & 0x01) << 6) | (ord(s[1]) >> 2))
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key.append(((ord(s[1]) & 0x03) << 5) | (ord(s[2]) >> 3))
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key.append(((ord(s[2]) & 0x07) << 4) | (ord(s[3]) >> 4))
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key.append(((ord(s[3]) & 0x0F) << 3) | (ord(s[4]) >> 5))
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key.append(((ord(s[4]) & 0x1F) << 2) | (ord(s[5]) >> 6))
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key.append(((ord(s[5]) & 0x3F) << 1) | (ord(s[6]) >> 7))
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key.append(ord(s[6]) & 0x7F)
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for i in range(8):
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key[i] = (key[i] << 1)
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key[i] = self.odd_parity[key[i]]
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return "".join(chr(k) for k in key)
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def decrypt_single_hash(self, rid, hbootkey, enc_hash, lmntstr):
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(des_k1, des_k2) = self.sid_to_key(rid)
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d1 = DES.new(des_k1.encode('latin1'), DES.MODE_ECB)
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d2 = DES.new(des_k2.encode('latin1'), DES.MODE_ECB)
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md5 = MD5.new()
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md5.update(hbootkey[:0x10] + pack("<L", rid) + lmntstr)
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rc4_key = md5.digest()
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rc4 = ARC4.new(rc4_key)
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obfkey = rc4.encrypt(enc_hash)
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hash = d1.decrypt(obfkey[:8]) + d2.decrypt(obfkey[8:])
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return hash
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def get_user_name(self, user, samhive):
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V = None
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for v in user.get_values():
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if v.get_name() == 'V':
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V = samhive.read(v.Data+4, v.DataLength)
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if not V:
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return None
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name_offset = unpack("<L", V[0x0c:0x10])[0] + 0xCC
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name_length = unpack("<L", V[0x10:0x14])[0]
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if name_length > len(V):
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return None
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username = V[name_offset:name_offset + name_length].decode('utf-16-le')
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return username
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#replaces the dump_hashes method in vol2
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def _generator(self, syshive, samhive):
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if syshive == None:
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print("SYSTEM address is None: Did you use the correct profile?")
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yield self.none_obj
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if samhive == None:
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print("SAM address is None: Did you use the correct profile?")
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yield self.none_obj
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bootkey = self.get_bootkey(syshive)
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hbootkey = self.get_hbootkey(samhive, bootkey)
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if hbootkey:
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for user in self.get_user_keys(samhive):
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ret = self.get_user_hashes(user, samhive, hbootkey)
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if not ret:
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yield self.none_obj
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else:
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lmhash, nthash = ret
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if not lmhash:
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lmhash = self.empty_lm
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if not nthash:
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nthash = self.empty_nt
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## temporary fix to prevent UnicodeDecodeError backtraces
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## however this can cause truncated user names as a result
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name = self.get_user_name(user, samhive)
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if name is not None:
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name = name.encode('ascii', 'ignore')
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else:
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name = "(unavailable)"
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if lmhash == self.empty_lm:
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lmout=lmhash
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else:
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lmout = binascii.hexlify(lmhash).decode('latin1')
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if nthash == self.empty_nt:
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ntout=nthash
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else:
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ntout = binascii.hexlify(nthash).decode('latin1')
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yield (0, (name.decode('latin1'),
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str(int(str(user.get_name()), 16)),
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lmout,
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ntout))
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else:
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print("Hbootkey is not valid")
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yield self.none_obj
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def run(self):
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offset = self.config.get('offset', None)
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syshive=None
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samhive=None
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for hive in hivelist.HiveList.list_hives(self.context,
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self.config_path,
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self.config['primary'],
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self.config['nt_symbols'],
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hive_offsets = None if offset is None else [offset]):
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if hive.get_name().split('\\')[-1].upper() == 'SYSTEM':
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syshive=hive
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if hive.get_name().split('\\')[-1].upper() == 'SAM':
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samhive=hive
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return renderers.TreeGrid([("User", str), ("rid", str), ("lmhash", str), ("nthash", str)],
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self._generator(syshive, samhive))
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