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reGeorgSocksProxy.py
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reGeorgSocksProxy.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import logging
import base64
import ssl
import argparse
import urllib3
from threading import Thread
try:
from urllib.parse import urlparse
except ImportError:
from urlparse import urlparse
from socket import *
from threading import Thread
from time import sleep
import struct
# Constants
SOCKTIMEOUT = 5
RESENDTIMEOUT = 300
VER4 = b"\x04"
VER = b"\x05"
METHOD = b"\x00"
SUCCESS = b"\x00"
SOCKFAIL = b"\x01"
NETWORKFAIL = b"\x02"
HOSTFAIL = b"\x04"
REFUSED = b"\x05"
TTLEXPIRED = b"\x06"
UNSUPPORTCMD = b"\x07"
ADDRTYPEUNSPPORT = b"\x08"
UNASSIGNED = b"\x09"
BASICCHECKSTRING = b"Georg says, 'All seems fine'"
BASICAUTH=""
HTTP_TLS = False
CERT_REQS = ssl.CERT_REQUIRED
# Globals
READBUFSIZE = 1024
# Logging
RESET_SEQ = "\033[0m"
COLOR_SEQ = "\033[1;%dm"
BOLD_SEQ = "\033[1m"
BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
LEVEL = {"INFO": logging.INFO, "DEBUG": logging.DEBUG, }
logLevel = "INFO"
COLORS = {
'WARNING': YELLOW,
'INFO': WHITE,
'DEBUG': BLUE,
'CRITICAL': YELLOW,
'ERROR': RED,
'RED': RED,
'GREEN': GREEN,
'YELLOW': YELLOW,
'BLUE': BLUE,
'MAGENTA': MAGENTA,
'CYAN': CYAN,
'WHITE': WHITE,
}
def formatter_message(message, use_color=True):
if use_color:
message = message.replace("$RESET", RESET_SEQ).replace("$BOLD", BOLD_SEQ)
else:
message = message.replace("$RESET", "").replace("$BOLD", "")
return message
class ColoredFormatter(logging.Formatter):
def __init__(self, msg, use_color=True):
logging.Formatter.__init__(self, msg)
self.use_color = use_color
def format(self, record):
levelname = record.levelname
if self.use_color and levelname in COLORS:
levelname_color = COLOR_SEQ % (30 + COLORS[levelname]) + levelname + RESET_SEQ
record.levelname = levelname_color
return logging.Formatter.format(self, record)
class ColoredLogger(logging.Logger):
def __init__(self, name):
FORMAT = "[$BOLD%(levelname)-18s$RESET] %(message)s"
COLOR_FORMAT = formatter_message(FORMAT, True)
logging.Logger.__init__(self, name, logLevel)
if (name == "transfer"):
COLOR_FORMAT = "\x1b[80D\x1b[1A\x1b[K%s" % COLOR_FORMAT
color_formatter = ColoredFormatter(COLOR_FORMAT)
console = logging.StreamHandler()
console.setFormatter(color_formatter)
self.addHandler(console)
return
logging.setLoggerClass(ColoredLogger)
log = logging.getLogger(__name__)
transferLog = logging.getLogger("transfer")
class SocksCmdNotImplemented(Exception):
pass
class SocksProtocolNotImplemented(Exception):
pass
class RemoteConnectionFailed(Exception):
pass
class session(Thread):
def __init__(self, pSocket, connectString):
Thread.__init__(self)
self.pSocket = pSocket
self.connectString = connectString
o = urlparse(connectString)
try:
self.httpPort = o.port
except:
if o.scheme == "https":
self.httpPort = 443
else:
self.httpPort = 80
self.httpScheme = o.scheme
self.httpHost = o.netloc.split(":")[0]
self.httpPath = o.path
self.cookie = None
if o.scheme == "http":
self.httpScheme = urllib3.HTTPConnectionPool
HTTP_TLS = False
else:
self.httpScheme = urllib3.HTTPSConnectionPool
HTTP_TLS = True
log.debug("finished init")
def parseSocks5(self, sock):
log.debug("SocksVersion5 detected")
nmethods = sock.recv(1)
methods = sock.recv(ord(nmethods))
sock.sendall(VER + METHOD)
ver = sock.recv(1)
if ver == b"\x02": # this is a hack for proxychains
ver, cmd, rsv, atyp = (sock.recv(1), sock.recv(1), sock.recv(1), sock.recv(1))
else:
cmd, rsv, atyp = (sock.recv(1), sock.recv(1), sock.recv(1))
target = None
targetPort = None
if atyp == b"\x01": # IPv4
# Reading 6 bytes for the IP and Port
target = sock.recv(4)
targetPort = sock.recv(2)
target = inet_ntoa(target)
# target = "." .join([str(ord(i)) for i in target])
elif atyp == b"\x03": # Hostname
targetLen = ord(sock.recv(1)) # hostname length (1 byte)
target = sock.recv(targetLen)
targetPort = sock.recv(2)
# target = "".join([unichr(ord(i)) for i in target])
target = target.decode()
elif atyp == b"\x04": # IPv6
target = sock.recv(16)
targetPort = sock.recv(2)
target = inet_ntop(AF_INET6, target)
#tmp_addr = []
#for i in xrange(len(target) / 2):
# tmp_addr.append(unichr(ord(target[2 * i]) * 256 + ord(target[2 * i + 1])))
#target = ":".join(tmp_addr)
if targetPort == None:
return False
# targetPort = ord(targetPort[0]) * 256 + ord(targetPort[1])
targetPortNum = struct.unpack('>H', targetPort)[0]
if cmd == b"\x02": # BIND
raise SocksCmdNotImplemented("Socks5 - BIND not implemented")
elif cmd == b"\x03": # UDP
raise SocksCmdNotImplemented("Socks5 - UDP not implemented")
elif cmd == b"\x01": # CONNECT
# serverIp = target
serverIp = inet_aton(target)
try:
serverIp = gethostbyname(target)
except:
log.error("oeps")
# serverIp = "".join([chr(int(i)) for i in serverIp.split(".")])
self.cookie = self.setupRemoteSession(target, targetPortNum)
# kst added below
serverIp = inet_aton(target)
if self.cookie:
sock.sendall(VER + SUCCESS + b"\x00" + b"\x01" + serverIp + targetPort)
return True
else:
sock.sendall(VER + REFUSED + b"\x00" + b"\x01" + serverIp + targetPort)
raise RemoteConnectionFailed("[%s:%d] Remote failed" % (target, targetPortNum))
raise SocksCmdNotImplemented("Socks5 - Unknown CMD")
def parseSocks4(self, sock):
log.debug("SocksVersion4 detected")
cmd = sock.recv(1)
if cmd == b"\x01": # Connect
targetPort = sock.recv(2)
# targetPort = ord(targetPort[0]) * 256 + ord(targetPort[1])
targetPortNum = struct.unpack('>H', targetPort)[0]
targetPortOrd = struct.pack(">h", targetPortNum)
target = sock.recv(4)
sock.recv(1)
# target = ".".join([str(ord(i)) for i in target])
target = inet_ntoa(target)
# target = inet_aton(str(target))
serverIp = target
log.debug("1 Connecting to %s:%s" % (target, serverIp))
try:
serverIp = gethostbyname(target)
except:
log.error("oeps")
log.debug("1 Resolved %s to %s" % (target, serverIp))
serverIp = inet_aton(str(serverIp))
# log.debug("2 Connecting to %s:%s" % (target, serverIp))
log.debug("3 Connecting to %s:%d" % (target, targetPortNum))
self.cookie = self.setupRemoteSession(target, targetPortNum)
if self.cookie:
log.debug("[%s:%d] success of getting cookie" % (target, targetPortNum))
barr=b"\x00" + b"\x5A" + serverIp + targetPortOrd
sock.sendall(barr)
return True
else:
log.debug("[%s:%d] not success of getting cookie" % (target, targetPortNum))
barr=b"\x00" + b"\x5B" + serverIp + targetPortOrd
sock.sendall(barr)
raise RemoteConnectionFailed("Remote connection failed")
else:
raise SocksProtocolNotImplemented("Socks4 - Command [%d] Not implemented" % ord(cmd))
def handleSocks(self, sock):
# This is where we setup the socks connection
log.debug("handleSocks()")
ver = sock.recv(1)
if ver == b"\x05":
return self.parseSocks5(sock)
elif ver == b"\x04":
return self.parseSocks4(sock)
def setupRemoteSession(self, target, port):
log.debug("setupRemoteSession()")
headers = {"X-CMD": "CONNECT", "X-TARGET": target, "X-PORT": str(port)}
if BASICAUTH != "":
headers['Authorization'] = ("Basic %s") % BASICAUTH
log.debug("headers['Authorization']")
log.debug(headers['Authorization'])
self.target = target
self.port = port
cookie = None
if HTTP_TLS:
if CERT_REQS == ssl.CERT_NONE:
conn = self.httpScheme(host=self.httpHost, port=self.httpPort, cert_reqs=CERT_REQS, assert_hostname=False)
else:
conn = self.httpScheme(host=self.httpHost, port=self.httpPort, cert_reqs=CERT_REQS)
else:
conn = self.httpScheme(host=self.httpHost, port=self.httpPort)
# response = conn.request("POST", self.httpPath, params, headers)
response = conn.urlopen('POST', self.connectString + "?cmd=connect&target=%s&port=%d" % (target, port), headers=headers, body="")
if response.status == 200:
status = response.getheader("x-status")
if status == "OK":
cookie = response.getheader("set-cookie")
log.info("[%s:%d] HTTP [200]: cookie [%s]" % (self.target, self.port, cookie))
else:
if response.getheader("X-ERROR") is not None:
log.error(response.getheader("X-ERROR"))
else:
log.error("[%s:%d] HTTP [%d]: [%s]" % (self.target, self.port, response.status, response.getheader("X-ERROR")))
log.error("[%s:%d] RemoteError: %s" % (self.target, self.port, response.data))
conn.close()
log.debug("setupRemoteSession()-end")
return cookie
def closeRemoteSession(self):
headers = {"X-CMD": "DISCONNECT", "Cookie": self.cookie}
if BASICAUTH != "":
headers['Authorization'] = "Basic %s" % BASICAUTH
params = ""
if HTTP_TLS:
if CERT_REQS == ssl.CERT_NONE:
conn = self.httpScheme(host=self.httpHost, port=self.httpPort, cert_reqs=CERT_REQS, assert_hostname=False)
else:
conn = self.httpScheme(host=self.httpHost, port=self.httpPort, cert_reqs=CERT_REQS)
else:
conn = self.httpScheme(host=self.httpHost, port=self.httpPort)
response = conn.request("POST", self.httpPath + "?cmd=disconnect", params, headers)
if response.status == 200:
log.info("[%s:%d] Connection Terminated" % (self.target, self.port))
conn.close()
def reader(self):
if HTTP_TLS:
conn = urllib3.PoolManager(cert_reqs = CERT_REQS)
else:
conn = urllib3.PoolManager()
while True:
try:
if not self.pSocket:
break
# data = b""
headers = {"X-CMD": "READ", "Cookie": self.cookie, "Connection": "Keep-Alive"}
if BASICAUTH != "":
headers['Authorization'] = "Basic %s" % BASICAUTH
response = conn.urlopen('POST', self.connectString + "?cmd=read", headers=headers, body="")
data = None
if response.status == 200:
status = response.getheader("x-status")
if status == "OK":
if response.getheader("set-cookie") is not None:
cookie = response.getheader("set-cookie")
data = response.data
# Yes I know this is horrible, but its a quick fix to issues with tomcat 5.x bugs that have been reported, will find a propper fix laters
try:
if response.getheader("server").find("Apache-Coyote/1.1") > 0:
data = data[:len(data) - 1]
except:
pass
if data is None:
data = b""
else:
data = None
log.error("[%s:%d] HTTP [%d]: Status: [%s]: Message [%s] Shutting down" % (self.target, self.port, response.status, status, response.getheader("X-ERROR")))
else:
log.error("[%s:%d] HTTP [%d]: Shutting down" % (self.target, self.port, response.status))
if data is None:
log.debug("[%s:%d] data is None" % (self.target, self.port))
# Remote socket closed
break
if len(data) == 0:
log.debug("[%s:%d] len(data)==0" % (self.target, self.port))
sleep(0.1)
continue
transferLog.info("[%s:%d] <<<< [%d]" % (self.target, self.port, len(data)))
self.pSocket.send(data)
except Exception as ex:
raise ex
self.closeRemoteSession()
log.debug("[%s:%d] Closing localsocket" % (self.target, self.port))
try:
self.pSocket.close()
except:
log.debug("[%s:%d] Localsocket already closed" % (self.target, self.port))
def writer(self):
global READBUFSIZE
if HTTP_TLS:
conn = urllib3.PoolManager(cert_reqs = CERT_REQS)
else:
conn = urllib3.PoolManager()
while True:
try:
self.pSocket.settimeout(1)
data = self.pSocket.recv(READBUFSIZE)
if not data:
break
headers = {"X-CMD": "FORWARD", "Cookie": self.cookie, "Content-Type": "application/octet-stream", "Connection": "Keep-Alive"}
if BASICAUTH != "":
headers['Authorization'] = "Basic %s" % BASICAUTH
response = conn.urlopen('POST', self.connectString + "?cmd=forward", headers=headers, body=data)
if response.status == 200:
status = response.getheader("x-status")
if status == "OK":
if response.getheader("set-cookie") is not None:
self.cookie = response.getheader("set-cookie")
else:
log.error("[%s:%d] HTTP [%d]: Status: [%s]: Message [%s] Shutting down" % (self.target, self.port, response.status, status, response.getheader("x-error")))
break
else:
log.error("[%s:%d] HTTP [%d]: Shutting down" % (self.target, self.port, response.status))
break
transferLog.info("[%s:%d] >>>> [%d]" % (self.target, self.port, len(data)))
except timeout:
continue
except Exception as ex:
raise ex
break
self.closeRemoteSession()
log.debug("Closing localsocket")
try:
self.pSocket.close()
except:
log.debug("Localsocket already closed")
def run(self):
log.debug("run()")
try:
if self.handleSocks(self.pSocket):
log.debug("Staring reader")
r = Thread(target=self.reader, args=())
r.start()
log.debug("Staring writer")
w = Thread(target=self.writer, args=())
w.start()
r.join()
w.join()
except SocksCmdNotImplemented as si:
log.error(si.message)
self.pSocket.close()
except SocksProtocolNotImplemented as spi:
log.error(spi.message)
self.pSocket.close()
except Exception as e:
log.error(e.message)
self.closeRemoteSession()
self.pSocket.close()
def askGeorg(connectString, creds):
global BASICAUTH
global HTTP_TLS
connectString = connectString
o = urlparse(connectString)
try:
httpPort = o.port
except:
if o.scheme == "https":
httpPort = 443
else:
httpPort = 80
httpScheme = o.scheme
httpHost = o.netloc.split(":")[0]
httpPath = o.path
if o.scheme == "http":
httpScheme = urllib3.HTTPConnectionPool
HTTP_TLS = False
else:
httpScheme = urllib3.HTTPSConnectionPool
HTTP_TLS = True
if HTTP_TLS:
if CERT_REQS == ssl.CERT_NONE:
conn = httpScheme(host=httpHost, port=httpPort, cert_reqs=CERT_REQS, assert_hostname=False)
else:
conn = httpScheme(host=httpHost, port=httpPort, cert_reqs=CERT_REQS)
else:
conn = httpScheme(host=httpHost, port=httpPort)
if creds != "":
headers = urllib3.make_headers(basic_auth=creds)
response = conn.request("GET", httpPath, headers=headers)
BASICAUTH=base64.b64encode(creds.encode()).decode()
log.debug(BASICAUTH)
else:
response = conn.request("GET", httpPath)
print(response.data.strip())
if response.status == 200:
# print(response.data.strip())
if BASICCHECKSTRING == response.data.strip():
log.info(BASICCHECKSTRING)
return True
conn.close()
return False
if __name__ == '__main__':
print("""\033[1m
\033[1;33m
_____
_____ ______ __|___ |__ ______ _____ _____ ______
| | | ___|| ___| || ___|/ \| | | ___|
| \ | ___|| | | || ___|| || \ | | |
|__|\__\|______||______| __||______|\_____/|__|\__\|______|
|_____|
... every office needs a tool like Georg
willem@sensepost.com / @_w_m__
sam@sensepost.com / @trowalts
etienne@sensepost.com / @kamp_staaldraad
kost/ @k0st
\033[0m
""")
log.setLevel(logging.DEBUG)
parser = argparse.ArgumentParser(description='Socks server for reGeorg HTTP(s) tunneller')
parser.add_argument("-c", "--creds", metavar="", help="Credentials for basic authentication as user:pass", default="")
parser.add_argument("-l", "--listen-on", metavar="", help="The default listening socks address", default="127.0.0.1")
parser.add_argument("-p", "--listen-port", metavar="", help="The default listening socks port", type=int, default="8888")
parser.add_argument("-r", "--read-buff", metavar="", help="Local read buffer, max data to be sent per POST", type=int, default="1024")
parser.add_argument("-s", "--ssl", metavar="", help="check TLS/SSL certificate", type=bool, default=False)
parser.add_argument("-u", "--url", metavar="", required=True, help="The url containing the tunnel script")
parser.add_argument("-v", "--verbose", metavar="", help="Verbose output[INFO|DEBUG]", default="INFO")
args = parser.parse_args()
if (args.verbose in LEVEL):
log.setLevel(LEVEL[args.verbose])
log.info("Log Level set to [%s]" % args.verbose)
if (args.ssl):
CERT_REQS = ssl.CERT_REQUIRED
else:
log.info("Disable SSL/TLS warnings")
CERT_REQS = ssl.CERT_NONE
ssl._create_default_https_context = ssl._create_unverified_context
urllib3.disable_warnings()
log.info("Starting socks server [%s:%d], tunnel at [%s]" % (args.listen_on, args.listen_port, args.url))
log.info("Checking if Georg is ready")
if not askGeorg(args.url, args.creds):
log.info("Georg is not ready, please check url")
exit()
READBUFSIZE = args.read_buff
servSock = socket(AF_INET, SOCK_STREAM)
servSock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
servSock.bind((args.listen_on, args.listen_port))
servSock.listen(1000)
while True:
try:
sock, addr_info = servSock.accept()
sock.settimeout(SOCKTIMEOUT)
log.debug("Incomming connection")
session(sock, args.url).start()
except KeyboardInterrupt as ex:
break
except Exception as e:
log.error(e)
servSock.close()