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redshell.py
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redshell.py
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# Copyright Verizon.
# Licensed under the terms of the Apache 2.0 license. See LICENSE file in project root for terms.
#!/bin/env python3
import argparse
import csv
import fileinput
import functools
import getpass
import os
import re
import shlex
import shutil
import socket
import struct
import sys
import textwrap
from datetime import datetime, timezone
import pexpect
from cmd2 import Cmd, Settable, ansi, with_argparser
from rich import box
from rich.console import Console
from rich.prompt import Prompt
from rich.table import Table
# define colors
green = functools.partial(ansi.style, fg=ansi.RgbFg(65, 255, 0))
red = functools.partial(ansi.style, fg=ansi.RgbFg(239, 41, 41))
def xstr(s):
"""return empty string if input is none/false"""
return '' if not s else s
class Logger():
logs = []
logfile_csv = None
csv_writer = None
def __init__(self, command, ip=None, dns_name=None, netbios_name=None, user_name=None, pid=None, ttps=None):
self.timestamp = datetime.now(timezone.utc)
self.command = command
self.ip = ip
self.dns_name = dns_name
self.netbios_name = netbios_name
self.user_name = user_name
self.pid = pid
self.ttps = ttps
self.write_log_entry()
Logger.logs.append(self)
@classmethod
def open_logfile(cls, basefilename):
logfile_csv = f"{basefilename}.csv"
print(f"Logging to: {logfile_csv}\n")
cls.logfile_csv = open(logfile_csv, 'w', newline='')
fieldnames = ['Datetime', 'IP Address', 'DNS Name', 'NetBIOS Name', 'User', 'PID', 'Activity', 'TTPs']
cls.csv_writer = csv.DictWriter(cls.logfile_csv, fieldnames=fieldnames)
cls.csv_writer.writeheader()
cls.logfile_csv.flush()
def asdict(self):
return {'Datetime': self.timestamp.strftime("%Y/%m/%d %H:%M:%S %z"),
'IP Address': xstr(self.ip),
'DNS Name': xstr(self.dns_name),
'NetBIOS Name': xstr(self.netbios_name),
'User': xstr(self.user_name),
'PID': xstr(self.pid),
'Activity': self.command,
'TTPs': self.ttps}
def write_log_entry(self):
Logger.csv_writer.writerow(self.asdict())
Logger.logfile_csv.flush()
@classmethod
def close_logfile(cls):
cls.logfile_csv.close()
class CSProxyPivots():
instances = {}
by_hash = {}
count = 0
def __init__(self, socks_type, socks_port, bid, beacon_pid, beacon_user, beacon_computer, beacon_ip, beacon_alive, beacon_last, socks5_auth=None):
self.socks_type = socks_type
self.socks_port = socks_port
self.socks5_auth = socks5_auth
self.socks5_user = None
self.socks5_pass = None
self.bid = bid
self.beacon_pid = beacon_pid
self.beacon_user = beacon_user
self.beacon_computer = beacon_computer
self.beacon_ip = beacon_ip
self.beacon_alive = beacon_alive
self.beacon_last = beacon_last
self.beacon_hash = hash(f"{bid}-{beacon_pid}-{socks_port}")
CSProxyPivots.count += 1
self.id = CSProxyPivots.count
CSProxyPivots.instances[self.id] = self
CSProxyPivots.by_hash[self.beacon_hash] = self
@classmethod
def get_pivots(cls):
data = []
data.append(['ID', 'Alive', 'Socks Type', 'Socks Port', 'Socks5 Auth', 'Beacon PID', 'Beacon User', 'Beacon Computer', 'Beacon Last'])
for pivot in CSProxyPivots.instances.values():
data.append([str(pivot.id), str(pivot.beacon_alive), pivot.socks_type, pivot.socks_port, pivot.socks5_auth, pivot.beacon_pid, pivot.beacon_user, pivot.beacon_computer, pivot.beacon_last])
return data
class RedShell(Cmd):
prompt = 'redshell > '
def __init__(self):
super().__init__()
# remove built-in commands
try:
del Cmd.do_alias
del Cmd.do_edit
del Cmd.do_macro
del Cmd.do_run_pyscript
del Cmd.do_run_script
del Cmd.do_shortcuts
del Cmd.do_py
except AttributeError:
pass
# remove built-in settings
for key in ['allow_style', 'always_show_hint', 'editor', 'echo', 'feedback_to_output', 'quiet', 'timing', 'max_completion_items']:
try:
self.remove_settable(key)
except:
pass
self.display_intro()
# check/create redshell user dir
home_dir = os.path.expanduser("~")
self.redshell_user_directory = f"{home_dir}/.redshell/"
if not os.path.exists(self.redshell_user_directory):
os.makedirs(self.redshell_user_directory)
# set cobalt strike directory, if exists
if os.path.exists('/opt/cobaltstrike'):
self.cs_directory = '/opt/cobaltstrike'
else:
self.cs_directory = ''
# set config variables
self.redshell_directory = os.getcwd()
self.proxychains_config = f"{self.redshell_directory}/proxychains_redshell.conf"
self.cs_host = ''
self.cs_port = ''
self.cs_user = ''
self.cs_pass = ''
self.cs_process = None
self.cs_beacon_pid = ''
self.cs_beacon_id = ''
self.cs_beacon_user = ''
self.cs_beacon_computer = ''
self.cs_beacon_ip = ''
self.context_ip = ''
self.context_dns_name = ''
self.context_netbios_name = ''
self.context_user_name = ''
self.context_pid = ''
self.socks_host = ''
self.socks_port = ''
self.socks_type = ''
self.socks5_auth = ''
self.socks5_user = ''
self.socks5_pass = ''
self.socks_port_connected = False
self.password = ''
self.check_socks = True
# initialze user settable options
self.add_settable(Settable('redshell_directory', str, 'redshell install directory', self, completer=Cmd.path_complete, onchange_cb=self._onchange_redshell_directory))
self.add_settable(Settable('proxychains_config', str, 'proxychains config file', self, completer=Cmd.path_complete))
self.add_settable(Settable('cs_directory', str, 'Cobalt Strike install directory', self, completer=Cmd.path_complete))
self.add_settable(Settable('cs_host', str, 'Cobalt Strike team server host', self))
self.add_settable(Settable('cs_port', str, 'Cobalt Strike team server port', self))
self.add_settable(Settable('cs_user', str, 'Cobalt Strike user', self, onchange_cb=self._onchange_cs_user))
self.add_settable(Settable('password', str, 'Password for beacon_exec commands. Invoke with $password.', self))
self.add_settable(Settable('check_socks', bool, 'Validate connections/authentication to SOCKS servers', self))
# start logger
now = datetime.now()
timestamp = now.strftime("%Y_%m_%d_%H_%M_%S")
basefilename = f"{self.redshell_user_directory}redshell_{timestamp}"
Logger.open_logfile(basefilename)
def _set_prompt(self):
if self.socks_port_connected == True:
color = green
else:
color = red
# set prompt with context vars
if self.context_user_name and self.context_netbios_name:
self.prompt = f"redshell ({color(f'{self.context_user_name}@{self.context_netbios_name}')}) > "
elif self.context_user_name and self.context_dns_name:
self.prompt = f"redshell ({color(f'{self.context_user_name}@{self.context_dns_name}')}) > "
elif self.context_dns_name:
self.prompt = f"redshell ({color(f'@{self.context_dns_name}')}) > "
elif self.context_ip:
self.prompt = f"redshell ({color(f'@{self.context_ip}')}) > "
def postcmd(self, stop, line):
self._set_prompt()
return stop
def display_intro(self):
intro = """
____ _______ __ ____
/ __ \___ ____/ / ___// /_ ___ / / /
/ /_/ / _ \/ __ /\__ \/ __ \/ _ \/ / /
/ _, _/ __/ /_/ /___/ / / / / __/ / /
/_/ |_|\___/\__,_//____/_/ /_/\___/_/_/
"""
self.poutput(green(intro))
def _onchange_redshell_directory(self, param_name, old, new):
self.proxychains_config = f"{self.redshell_directory}/proxychains_redshell.conf"
# append '_redshell' to CS username
def _onchange_cs_user(self, param_name, old, new):
self.cs_user += '_redshell'
def print_table(self, data, header=False):
"""print all tables in console output"""
if header:
table = Table(show_lines=True, show_header=header)
else:
table = Table(show_lines=True, show_header=header, box=box.SQUARE)
column_count = range(0, len(data[0]))
for i in column_count:
if header:
table.add_column(data[0][i])
else:
table.add_column()
for row in data:
if header and data.index(row) == 0:
continue
table.add_row(*row)
console = Console()
console.print(table)
def update_proxychains_conf(self, socks_type, ip, socks_port, socks5_auth=None, socks5_user=None, socks5_pass=None):
for line in fileinput.input(self.proxychains_config, inplace=True):
if line.startswith('socks'):
if socks_type == 'socks5' and socks5_auth:
print(f"{socks_type} {ip} {socks_port} {socks5_user} {socks5_pass}", end="\n")
else:
print(f"{socks_type} {ip} {socks_port}", end="\n")
else:
print(line, end = '')
def clear_context(self, clear_socks=False, clear_cs=False):
# clear existing connection
self.cs_beacon_id = ''
self.cs_beacon_pid = ''
self.cs_beacon_user = ''
self.cs_beacon_computer = ''
self.cs_beacon_ip = ''
self.context_ip = ''
self.context_dns_name = ''
self.context_netbios_name = ''
self.context_user_name = ''
self.context_pid = ''
# clear socks port if user is applying a new one
if clear_socks:
self.socks_host = ''
self.socks_port = ''
self.socks_type = ''
self.socks5_auth = ''
self.socks5_user = ''
self.socks5_pass = ''
self.socks_port_connected = False
# if connected to cs team server, kill connection
if clear_cs:
# close the agscript process
if self.cs_process:
self.cs_process.close()
self.cs_process = None
argparser = argparse.ArgumentParser()
argparser.add_argument('-d', '--dnsname', type=str, help="DNS Name")
argparser.add_argument('-n', '--netbiosname', type=str, help="NetBIOS Name")
argparser.add_argument('-u', '--username', type=str, help="User Name")
argparser.add_argument('-p', '--pid', type=str, help="Process ID")
argparser.add_argument(type=str, dest="ip_address", help="Source IP Address")
@with_argparser(argparser)
def do_context(self, args):
"""Set a custom context (Source IP/DNS/NetBIOS/User/PID) for logging"""
if self.context_ip:
self.poutput("Context changed!")
self.pwarning("WARNING: If moving to a new socks port, be sure to update your socks connection accordingly.")
else:
self.poutput("New context applied!")
# if connected to cs team server, kill connection and socks. else clear context values only
if self.cs_process:
self.clear_context(clear_socks=True, clear_cs=True)
else:
self.clear_context()
self.context_ip = args.ip_address
if args.dnsname:
self.context_dns_name = args.dnsname
if args.netbiosname:
self.context_netbios_name = args.netbiosname
if args.username:
self.context_user_name = args.username
if args.pid:
self.context_pid = args.pid
argparser = argparse.ArgumentParser()
argparser.add_argument(type=str, dest="socks_type", choices=['socks4', 'socks5'])
argparser.add_argument(type=str, dest="ip_address")
argparser.add_argument(type=str, dest="socks_port")
argparser.add_argument('-u', type=str, dest="socks5_user")
argparser.add_argument('-p', type=str, dest="socks5_pass")
@with_argparser(argparser)
def do_socks(self, args):
"""Use a custom socks4/5 server"""
# clear any existing context, socks port, and cobalt strike connections
self.clear_context(clear_socks=True, clear_cs=True)
self.socks_type = args.socks_type
self.socks_host = args.ip_address
self.socks_port = args.socks_port
self.socks_port_connected = True
if args.socks_type == 'socks5':
if (args.socks5_user and not args.socks5_pass) or (args.socks5_pass and not args.socks5_user):
if args.socks_user:
self.perror("ERROR: SOCKS5 user set but missing password!")
else:
self.perror("ERROR: SOCKS5 password set but missing user!")
return
elif args.socks5_user and args.socks5_pass:
self.socks5_auth = 'UserAndPwd'
self.socks5_user = args.socks5_user
self.socks5_pass = args.socks5_pass
else:
self.socks5_auth = ''
self.socks5_user = ''
self.socks5_pass = ''
if self.check_socks:
if self.validate_socks(self.socks_type, self.socks_host, self.socks_port, self.socks5_auth, self.socks5_user, self.socks5_pass):
self.update_proxychains_conf(self.socks_type, self.socks_host, self.socks_port, self.socks5_auth, self.socks5_user, self.socks5_pass)
self.socks_port_connected = True
else:
self.clear_context(clear_socks=True)
return
else:
self.update_proxychains_conf(self.socks_type, self.cs_host, self.socks_port, self.socks5_auth, self.socks5_user, self.socks5_pass)
self.socks_port_connected = True
self.poutput("Socks port updated.")
self.pwarning("WARNING: Be sure to update your context accordingly with the 'context' command.")
def do_cs_connect(self, args):
"""Connect to Cobalt Strike team server"""
self.clear_context(clear_socks=True)
# check config directories before attempting connection
if not os.path.exists(f"{self.redshell_directory}/agscript.sh"):
self.perror("Error: redshell install directory not found! Set the directory with this command: 'set redshell_directory'")
return
if not os.path.exists(f"{self.cs_directory}/agscript"):
self.perror("Error: Cobalt Strike install directory not found! Set the directory with this command: 'set cs_directory'")
return
# check permissions on agscript.sh
if not shutil.which(f"{self.redshell_directory}/agscript.sh"):
self.perror("Error: agscript.sh does not appear to be executable! Fix it with this command: 'chmod +x agscript.sh'")
return
# prompt user for team server password
self.cs_pass = getpass.getpass("Enter Cobalt Strike password: ")
# spawn agscript process
self.cs_process = pexpect.spawn(f"{self.redshell_directory}/agscript.sh {self.cs_directory} {self.cs_host} {self.cs_port} {self.cs_user} {self.cs_pass}")
# check if process is alive
if not self.cs_process.isalive():
self.perror("Error connecting to CS team server! Check config and try again.")
return
# look for the aggressor prompt
try:
self.cs_process.expect('.*aggressor.*> ')
except:
self.perror("Error connecting to CS team server! Check config and try again.")
return
self.poutput("Connecting...")
# upon successful connection, display status
self.do_cs_status('')
def do_cs_disconnect(self, args):
"""Disconnect from CS team server"""
self.clear_context(clear_socks=True, clear_cs=True)
def do_cs_status(self, args):
"""Display CS team server and beacon socks port connection status"""
if self.cs_process and self.cs_process.isalive():
cs_server_status = f"[#41FF00]Connected via {self.cs_user}@{self.cs_host}:{self.cs_port}[/]"
else:
cs_server_status = "[#EF2929]Disconnected[/]"
if self.cs_process and self.cs_process.isalive() and self.socks_port_connected:
socks_port_status = f"[#41FF00]Connected via {self.socks_type} port {self.socks_port} @ beacon PID {self.cs_beacon_pid}[/]"
else:
socks_port_status = "[#EF2929]Disconnected[/]"
data = [
["[i]CS Team Server Status[/]", cs_server_status],
["[i]Socks Port Status[/]", socks_port_status]
]
self.print_table(data)
argparser = argparse.ArgumentParser()
argparser.add_argument('-s', action='store_true', dest='show_secrets', help="Show secrets")
@with_argparser(argparser)
def do_config(self, args):
"""Display current config"""
data = [
["[i]Redshell Install Directory[/]", self.redshell_directory],
["[i]Proxychains Config[/]", self.proxychains_config],
["[i]Log File[/]", Logger.logfile_csv.name],
["[i]CS Install Directory[/]", self.cs_directory],
]
if self.cs_host:
data.append(["[i]CS Team Server[/]", self.cs_host])
data.append(["[i]CS Team Server Port[/]", self.cs_port])
data.append(["[i]CS User[/]", self.cs_user])
if self.socks_port:
data.append(["[i]Socks Connection", f"{self.socks_type}://{self.socks_host}:{self.socks_port}"])
if self.socks5_auth:
data.append(["[i]Socks5 User", self.socks5_user])
data.append(["[i]Socks5 Password", self.socks5_pass if args.show_secrets else '*' * len(self.socks5_pass)])
else:
data.append(["[i]Socks Connection", ''])
context = ''
if self.context_ip:
context += f"[i]IP:[/] {self.context_ip}"
if self.context_dns_name:
context += f" [i]DNS:[/] {self.context_dns_name}"
if self.context_netbios_name:
context += f" [i]NetBIOS:[/] {self.context_netbios_name}"
if self.context_user_name:
context += f" [i]User:[/] {self.context_user_name}"
if self.context_pid:
context += f" [i]PID:[/] {self.context_pid}"
data.append(["[i]Context[/]", context])
if self.password:
data.append(["[i]Password[/]", self.password if args.show_secrets else '*' * len(self.password)])
self.print_table(data)
argparser = argparse.ArgumentParser()
argparser.add_argument(type=str, dest="file_name", completer=Cmd.path_complete)
@with_argparser(argparser)
def do_cs_load_config(self, args):
"""Load Cobalt Strike team server config (host, port, and user) from file"""
self.clear_context(clear_socks=True)
try:
with open(args.file_name, 'r') as cf:
for line in cf.readlines():
cs_host = re.search('cs_host=(.*)', line)
if cs_host:
self.cs_host = cs_host.group(1)
cs_port = re.search('cs_port=(.*)', line)
if cs_port:
self.cs_port = cs_port.group(1)
cs_directory = re.search('cs_directory=(.*)', line)
if cs_directory:
self.cs_directory = cs_directory.group(1).strip(' ')
cs_user = re.search('cs_user=(.*)', line)
if cs_user:
self.cs_user = cs_user.group(1)
self.cs_user += '_redshell'
self.poutput("Config applied:")
self.do_config('')
self.do_cs_connect('')
except FileNotFoundError:
self.perror("Error: config file not found!")
def do_cs_pivots(self, args):
"""Show Cobalt Strike proxy pivots available on the team server"""
# check for active connection to the team server
if not self.cs_process or not self.cs_process.isalive():
self.perror("Error: not connected to CS team server. Connect first and then select a pivot.")
self.clear_context(clear_socks=True)
return
# ask agscript for pivots
self.cs_process.sendline('x pivots()')
self.cs_process.expect('.*aggressor.*> ')
if self.cs_process.after:
# copy instance containers and clear them to reset
pivot_instances = CSProxyPivots.instances.copy()
pivot_instances_by_hash = CSProxyPivots.by_hash.copy()
CSProxyPivots.instances.clear()
CSProxyPivots.by_hash.clear()
CSProxyPivots.count = 0
# parse through results
for result in re.findall('%\([^()]*\)', self.cs_process.after.decode()):
pivot_socks_type = None
pivot_socks_port = None
pivot_socks5_auth = None
pivot_bid = None
pivot_pid = None
pivot_user = None
pivot_computer = None
pivot_alive = None
pivot_last = None
# get socks type
result_socks_type = re.search("type => '(SOCKS[5|4a]).*?'", result)
if result_socks_type:
pivot_socks_type = result_socks_type.group(1).lower()
# get socks5 auth
result_socks_info = re.search("socks_info => '(.*?)'", result)
if result_socks_info:
socks_info = result_socks_info.group(1).lower()
if 'userandpwd' in socks_info and not 'noauth' in socks_info:
pivot_socks5_auth = 'userandpwd'
# get socks port
result_port = re.search("port => '([0-9]+)'", result)
if result_port:
pivot_socks_port = result_port.group(1)
# get beacon ID
result_bid = re.search("bid => '([0-9]+)'", result)
if result_bid:
pivot_bid = result_bid.group(1)
if pivot_bid:
# get full beacon info for beacon ID
self.cs_process.sendline(f"x beacon_info({pivot_bid})")
self.cs_process.expect('.*aggressor.*> ')
if self.cs_process.after:
beacon_info = self.cs_process.after.decode()
# check if beacon is alive or dead
result_alive = re.search("alive => 'true'", beacon_info)
if result_alive:
pivot_alive = True
# get beacon user
result_user = re.search("user => '(.*?)'", beacon_info)
if result_user:
pivot_user = result_user.group(1)
# get beacon computer
result_computer = re.search("computer => '(.*?)'", beacon_info)
if result_computer:
pivot_computer = result_computer.group(1)
# get beacon ip
result_ip = re.search("internal => '(.*?)'", beacon_info)
if result_ip:
pivot_ip = result_ip.group(1)
# get beacon pid
result_pid = re.search("pid => '([0-9]+)'", beacon_info)
if result_pid:
pivot_pid = result_pid.group(1)
# get beacon last
result_last = re.search("lastf => '(.*?)'", beacon_info)
if result_last:
pivot_last = result_last.group(1)
# intialize ProxyPivot instance if we have all the necessary details
if pivot_socks_type and pivot_socks_port and pivot_bid and pivot_pid and pivot_user and pivot_computer and pivot_alive and pivot_last:
# look for existing pivot instance
pivot_hash = hash(f"{pivot_bid}-{pivot_pid}-{pivot_socks_port}")
cs_pivot = pivot_instances_by_hash.get(pivot_hash)
# if we have an existing pivot, just update alive and last values
if cs_pivot:
cs_pivot.beacon_alive = pivot_alive
cs_pivot.beacon_last = pivot_last
CSProxyPivots.count += 1
cs_pivot.id = CSProxyPivots.count
# add existing instance back into class containers
CSProxyPivots.instances[cs_pivot.id] = cs_pivot
CSProxyPivots.by_hash[pivot_hash] = cs_pivot
# none found, make a new instance
else:
CSProxyPivots(pivot_socks_type, pivot_socks_port, pivot_bid, pivot_pid, pivot_user, pivot_computer, pivot_ip, pivot_alive, pivot_last, pivot_socks5_auth)
# display ProxyPivot table
if CSProxyPivots.instances.items():
self.print_table(CSProxyPivots.get_pivots(), header=True)
else:
self.pwarning("No proxy pivots found!")
def do_cs_use_pivot(self, arg_pivot_id):
"""Set RedShell to use Cobalt Strike pivot ID"""
self.clear_context(clear_socks=True)
# check for active connection to the team server
if not self.cs_process or not self.cs_process.isalive():
self.perror("Error: not connected to CS team server. Connect first and then select a pivot.")
return
if not CSProxyPivots.instances:
self.perror("No pivots found! Run 'cs_pivots' to query them on the team server")
return
# convert arg to int
try:
pivot_id = int(arg_pivot_id)
except ValueError:
self.perror('Invalid pivot ID, must be int!')
return
# get pivot instance by specified ID
proxy_pivot = CSProxyPivots.instances.get(pivot_id)
if proxy_pivot:
if proxy_pivot.beacon_alive:
# set config vars from selected ProxyPiot instance
self.cs_beacon_id = proxy_pivot.bid
self.cs_beacon_pid = proxy_pivot.beacon_pid
self.cs_beacon_user = proxy_pivot.beacon_user.replace(' *', '')
self.cs_beacon_computer = proxy_pivot.beacon_computer
self.cs_beacon_ip = proxy_pivot.beacon_ip
self.context_pid = proxy_pivot.beacon_pid
self.context_user_name = proxy_pivot.beacon_user.replace(' *', '')
self.context_netbios_name = proxy_pivot.beacon_computer
self.context_ip = proxy_pivot.beacon_ip
self.socks_host = self.cs_host
self.socks_port = proxy_pivot.socks_port
self.socks_type = proxy_pivot.socks_type
self.socks5_auth = proxy_pivot.socks5_auth
# collect socks5 creds
if self.socks_type == 'socks5' and self.socks5_auth:
if not proxy_pivot.socks5_user and not proxy_pivot.socks5_pass:
self.poutput("SOCKS5 pivot requires authentication.\n")
proxy_pivot.socks5_user = self.read_input("Enter SOCKS5 user: ")
self.socks5_user = proxy_pivot.socks5_user
proxy_pivot.socks5_pass = getpass.getpass("Enter SOCKS5 password: ")
self.socks5_pass = proxy_pivot.socks5_pass
else:
self.socks5_user = proxy_pivot.socks5_user
self.socks5_pass = proxy_pivot.socks5_pass
if self.check_socks:
if self.validate_socks(self.socks_type, self.socks_host, self.socks_port, self.socks5_auth, self.socks5_user, self.socks5_pass, proxy_pivot):
self.update_proxychains_conf(self.socks_type, self.cs_host, self.socks_port, self.socks5_auth, self.socks5_user, self.socks5_pass)
self.socks_port_connected = True
else:
self.clear_context(clear_socks=True)
return
else:
self.update_proxychains_conf(self.socks_type, self.cs_host, self.socks_port, self.socks5_auth, self.socks5_user, self.socks5_pass)
self.socks_port_connected = True
self.do_cs_status('')
return
else:
self.pwarning('Specified pivot ID is not alive!')
return
else:
self.perror('Invalid pivot ID!')
return
def validate_socks(self, socks_type, ip, port, socks5_auth=None, socks5_user=None, socks5_pass=None, cs_proxy_pivot=None):
"""checks connectivity and authentication to SOCKS servers"""
# initialize socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# connect to the IP and port
try:
s.connect((ip, int(port)))
except ConnectionRefusedError:
self.perror("Error connecting to SOCKS proxy: Connection refused!")
# if it's socks4 then we're all done
if socks_type == 'socks4':
s.close()
return True
# test socks5 with no auth
elif socks_type == 'socks5' and not socks5_auth:
# 0x05 = SOCKS5, 0x01 = client supports one auth type, 0x00 = no auth
handshake = struct.pack('BBB', 0x05, 0x01, 0x00)
s.sendall(handshake)
try:
data = s.recv(2)
version, auth = struct.unpack('BB', data)
except:
self.perror("Error connecting to SOCKS proxy!")
s.close()
return False
if version == 5 and auth == 0:
s.close()
return True
# test socks5 with user/pass auth
elif socks_type == 'socks5' and socks5_auth:
# 0x05 = SOCKS5, 0x01 = client supports one auth type, 0x01 = user/pass auth
handshake = struct.pack('BBB', 0x05, 0x01, 0x02)
s.sendall(handshake)
try:
data = s.recv(2)
version, auth = struct.unpack('BB', data)
except:
self.perror("Error connecting to SOCKS proxy!")
s.close()
return False
if version == 5 and auth == 2:
auth = b"\x01" + struct.pack("B", len(socks5_user)) + socks5_user.encode() + struct.pack("B", len(socks5_pass)) + socks5_pass.encode()
s.sendall(auth)
try:
data = s.recv(2)
version, status = struct.unpack('BB', data)
except:
self.perror("Error connecting to SOCKS5 proxy!")
s.close()
return False
if status == 0:
s.close()
return True
else:
self.perror("Error authenticating to SOCKS5 proxy!")
s.close()
# reset creds on the pivot instance since auth failed
if cs_proxy_pivot:
cs_proxy_pivot.socks5_user = None
cs_proxy_pivot.socks5_pass = None
return False
else:
self.perror("Error connecting to SOCKS5 proxy!")
s.close()
return False
def do_cd(self, args):
"""Change directory"""
os.chdir(args)
# configure auto complete on the cd command
complete_cd = Cmd.path_complete
def do_pwd(self, args):
"""Print working directory"""
self.poutput(os.getcwd())
def do_exit(self, args):
"""Exit RedShell"""
Logger.close_logfile()
return True
def validate_ttps(self, ttps):
ttps_valid = []
ttps_check = ttps.split(',')
for ttp in ttps_check:
if re.match('^(T[0-9]{4})(\.[0-9]{3})?$', ttp):
ttps_valid.append(ttp)
else:
self.pwarning(f"Invalid TTP specified: {ttp}. Not including in log.")
validated_ttps = ', '.join(ttps_valid)
return validated_ttps
argparser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter)
argparser.description = "Execute a command through beacon socks proxy and simultaneously log it to the teamserver."
argparser.epilog = textwrap.dedent('''
example:
beacon_exec -t T1550.002,T1003.002 cme smb 192.168.1.1 --local-auth -u Administrator -H C713B1D611657D0687A568122193F230 --sam
''')
argparser.add_argument('-t', '--ttp', type=str, help="MITRE ATT&CK Tactic IDs. Comma delimited to specify multiple.")
argparser.add_argument('command', nargs=argparse.REMAINDER, help="Command to execute through the beacon proxy and log.", completer=Cmd.shell_cmd_complete)
@with_argparser(argparser)
def do_beacon_exec(self, args):
# check if agscript process is alive
if not self.cs_process or not self.cs_process.isalive():
self.perror("Error: not connected to CS team server. Connect first and then select a pivot.")
return
# check if socks port is connected
elif not self.socks_port_connected:
self.perror("Error: socks port not connected!")
return
else:
# make a copy of the user-specified command
command_list = args.command
# add proxychains to the command if user didn't include it
if 'proxychains' not in command_list:
id = 0
if 'sudo' in command_list:
id = 1
for item in ['proxychains', '-f', self.proxychains_config]:
command_list.insert(id, item)
id += 1
# convert command list into a string
command = shlex.join(command_list)
if '$password' in command and not self.password:
self.perror("Error: $password invoked, but password is not set. Add it with command: set password <password>")
return
command = re.sub("\$password", self.password, command)
# only log the command (minus sudo and proxychains)
cs_log_command = re.sub("proxychains.*?conf |sudo ", '', command)
cs_log_command = re.sub("\\\\", "\\\\\\\\", cs_log_command)
cs_log_command = re.sub("\$", "\$", cs_log_command) # escape $ char
cs_log_command = cs_log_command.replace('"', '\\"') # escape " char
cs_log_command = f"[PROXY] {cs_log_command}" # append [PROXY] to logged command
log_command = re.sub("proxychains.*?conf |sudo ", '', command)
log_command = f"[PROXY] {log_command}" # append [PROXY] to logged command
ttps = ''
if args.ttp:
ttps = self.validate_ttps(args.ttp)
if ttps:
# log command with TTPs to team server
self.cs_process.sendline(f'x btask({self.cs_beacon_id}, "{cs_log_command}", "{ttps}")')
self.cs_process.expect('.*aggressor.*> ')
else:
# log command without TTPs to team server
self.cs_process.sendline(f'x btask({self.cs_beacon_id}, "{cs_log_command}")')
self.cs_process.expect('.*aggressor.*> ')
Logger(log_command, ip=self.cs_beacon_ip, netbios_name=self.cs_beacon_computer, user_name=self.cs_beacon_user, pid=self.cs_beacon_pid, ttps=ttps.replace(' ', ''))
# run the command
self.do_shell(command)
argparser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter)
argparser.description = "Execute a command through custom socks proxy and simultaneously log it to the local file."
argparser.epilog = textwrap.dedent('''
example:
proxy_exec -t T1550.002,T1003.002 cme smb 192.168.1.1 --local-auth -u Administrator -H C713B1D611657D0687A568122193F230 --sam
''')