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socksproxyserver.py
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import _thread
import queue
import socket
import ssl
from typing import override
from empire.server.core.config import config_manager
from empire.server.core.plugins import BasePlugin
class Plugin(BasePlugin):
@override
def on_load(self, db):
self.execution_enabled = False
self.settings_options = {
"handlerport": {
"Description": "Port number.",
"Required": True,
"Value": 443,
},
"proxyport": {
"Description": "Port number.",
"Required": True,
"Value": 1080,
},
"certificate": {
"Description": "Certificate directory [Default: Empire self-signed cert].",
"Required": False,
"Value": "",
"Type": "file",
},
"privatekey": {
"Description": "Private key directory [Default: Empire private key]",
"Required": False,
"Value": "",
"Type": "file",
},
}
# load default empire certs
self.cert_path = str(config_manager.DATA_DIR / "cert")
self.certificate = f"{self.cert_path}/empire-chain.pem"
self.private_key = f"{self.cert_path}/empire-priv.key"
self.handler_port = self.settings_options["handlerport"]["Value"]
self.proxy_port = self.settings_options["proxyport"]["Value"]
@override
def on_start(self, db):
settings = self.current_settings(db)
self.handler_port = settings["handlerport"]
self.proxy_port = settings["proxyport"]
if settings["certificate"]:
self.certificate = settings["certificate"]
if settings["privatekey"]:
self.private_key = settings["privatekey"]
_thread.start_new_thread(
self.server,
(
self.handler_port,
self.proxy_port,
self.certificate,
self.private_key,
),
)
def on_stop(self, db):
"""
if the plugin spawns a process provide a shutdown method for when Empire exits else leave it as pass
"""
socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect(
("127.0.0.1", int(self.handler_port))
)
socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect(
("127.0.0.1", int(self.proxy_port))
)
def handler_server(self, q, handler_port, certificate, private_key):
context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
context.minimum_version = ssl.TLSVersion.TLSv1
context.set_ciphers("DEFAULT@SECLEVEL=0")
context.load_cert_chain(certificate, private_key)
try:
dock_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
dock_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
dock_socket.bind(("", int(handler_port)))
dock_socket.listen(5)
self.send_socketio_message("[+] Socks proxy server started")
while self.enabled:
try:
clear_socket, address = dock_socket.accept()
client_socket = context.wrap_socket(clear_socket, server_side=True)
try:
data = b""
while data.count(b"\n") < 3:
data_recv = client_socket.recv()
data += data_recv
client_socket.send(
b"HTTP/1.1 200 OK\nContent-Length: 999999\nContent-Type: text/plain\nConnection: Keep-Alive\nKeep-Alive: timeout=20, max=10000\n\n"
)
q.get(False)
except Exception:
pass
q.put(client_socket)
except Exception:
pass
except Exception as e:
self.send_socketio_message("[!] " + e.strerror)
finally:
dock_socket.close()
def get_active_connection(self, q):
try:
client_socket = q.get(block=True, timeout=10)
except Exception:
return None
try:
client_socket.send(b"HELLO")
except Exception:
return self.get_active_connection(q)
return client_socket
def server(self, handler_port, proxy_port, certificate, private_key):
q = queue.Queue()
_thread.start_new_thread(
self.handler_server, (q, handler_port, certificate, private_key)
)
try:
dock_socket2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
dock_socket2.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
dock_socket2.bind(("127.0.0.1", int(proxy_port)))
dock_socket2.listen(5)
self.send_socketio_message("[*] Socks server listening on: " + str(proxy_port))
while self.enabled:
try:
client_socket2, address = dock_socket2.accept()
client_socket = self.get_active_connection(q)
if client_socket is None:
client_socket2.close()
_thread.start_new_thread(
self.forward, (client_socket, client_socket2)
)
_thread.start_new_thread(
self.forward, (client_socket2, client_socket)
)
except Exception as e:
self.send_socketio_message(f"[!] Exception: {e}")
except Exception as e:
self.send_socketio_message(f"[!] Exception: {e}")
finally:
dock_socket2.close()
self.send_socketio_message("[!] Socks proxy server stopped")
def forward(self, source, destination):
try:
string = " "
while string:
string = source.recv(1024)
if string:
destination.sendall(string)
else:
source.shutdown(socket.SHUT_RD)
destination.shutdown(socket.SHUT_WR)
except Exception:
try:
source.shutdown(socket.SHUT_RD)
destination.shutdown(socket.SHUT_WR)
except Exception:
pass
pass