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Refactored new user in linux to AutoNewLinuxUser and created AutoNewUser ABC

This commit is contained in:
Shay Nehmad 2019-10-03 14:58:55 +03:00
parent 3f5272b83b
commit 321c93063e
2 changed files with 78 additions and 30 deletions
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23
monkey/infection_monkey/post_breach/actions/communicate_as_new_user.py
View File

@ -5,7 +5,7 @@ import string
import subprocess
import time
from infection_monkey.utils.windows.auto_new_user import AutoNewUser, NewUserError
from infection_monkey.utils.windows.auto_new_user import NewUserError, create_auto_new_user
from common.data.post_breach_consts import POST_BREACH_COMMUNICATE_AS_NEW_USER
from infection_monkey.post_breach.pba import PBA
from infection_monkey.telemetry.post_breach_telem import PostBreachTelem
@ -47,19 +47,12 @@ class CommunicateAsNewUser(PBA):
def communicate_as_new_user_linux(self, username):
try:
# add user + ping
linux_cmds = get_linux_commands_to_add_user(username)
commandline = "ping -c 1 {}".format(PING_TEST_DOMAIN)
linux_cmds.extend([";", "sudo", "-u", username, commandline])
final_command = ' '.join(linux_cmds)
exit_status = os.system(final_command)
self.send_ping_result_telemetry(exit_status, commandline, username)
# delete the user.
commands_to_delete_user = get_linux_commands_to_delete_user(username)
logger.debug("Trying to delete the user {} with commands {}".format(username, str(commands_to_delete_user)))
delete_user_output = subprocess.check_output(" ".join(commands_to_delete_user), stderr=subprocess.STDOUT, shell=True)
logger.debug("Deletion output: {}".format(delete_user_output))
# Leaking the process on purpose - nothing we can do if it's stuck.
with create_auto_new_user(username, PASSWORD) as new_user:
commandline = "sudo -u {username} ping -c 1 {domain}".format(
username=new_user.username,
domain=PING_TEST_DOMAIN)
exit_status = os.system(commandline)
self.send_ping_result_telemetry(exit_status, commandline, new_user.username)
except subprocess.CalledProcessError as e:
PostBreachTelem(self, (e.output, False)).send()
@ -71,7 +64,7 @@ class CommunicateAsNewUser(PBA):
import win32event
try:
with AutoNewUser(username, PASSWORD) as new_user:
with create_auto_new_user(username, PASSWORD) as new_user:
# Using os.path is OK, as this is on windows for sure
ping_app_path = os.path.join(os.environ["WINDIR"], "system32", "PING.exe")
if not os.path.exists(ping_app_path):

85
monkey/infection_monkey/utils/windows/auto_new_user.py
View File

@ -1,7 +1,9 @@
import logging
import subprocess
import abc
from infection_monkey.post_breach.actions.add_user import BackdoorUser
from infection_monkey.utils.environment import is_windows_os
from infection_monkey.utils.linux.users import get_linux_commands_to_add_user, get_linux_commands_to_delete_user
from infection_monkey.utils.windows.users import get_windows_commands_to_delete_user, get_windows_commands_to_add_user, \
get_windows_commands_to_deactivate_user
@ -12,26 +14,79 @@ class NewUserError(Exception):
pass
class AutoNewUser(object):
class AutoNewUser:
"""
RAII object to use for creating and using a new user in Windows. Use with `with`.
RAII object to use for creating and using a new user. Use with `with`.
User will be created when the instance is instantiated.
User will log on at the start of the `with` scope.
User will log off and get deleted at the end of said `with` scope.
User will be available for use (log on for Windows, for example) at the start of the `with` scope.
User will be removed (deactivated and deleted for Windows, for example) at the end of said `with` scope.
Example:
# Created # Logged on
with AutoNewUser("user", "pass") as new_user:
# Created # Logged on
with AutoNewUser("user", "pass", is_on_windows()) as new_user:
...
...
# Logged off and deleted
...
"""
__metaclass__ = abc.ABCMeta
def __init__(self, username, password):
raise NotImplementedError()
@abc.abstractmethod
def __enter__(self):
raise NotImplementedError()
@abc.abstractmethod
def __exit__(self, exc_type, exc_val, exc_tb):
raise NotImplementedError()
def create_auto_new_user(username, password, is_windows=is_windows_os()):
if is_windows:
return AutoNewWindowsUser(username, password)
else:
return AutoNewLinuxUser(username, password)
class AutoNewLinuxUser(AutoNewUser):
"""
See AutoNewUser's documentation for details.
"""
def __init__(self, username, password):
"""
Creates a user with the username + password.
:raises: subprocess.CalledProcessError if failed to add the user.
"""
super(AutoNewLinuxUser, self).__init__(username, password)
self.username = username
self.password = password
commands_to_add_user = get_linux_commands_to_add_user(username)
logger.debug("Trying to add {} with commands {}".format(self.username, str(commands_to_add_user)))
_ = subprocess.check_output(' '.join(commands_to_add_user), stderr=subprocess.STDOUT, shell=True)
def __enter__(self):
pass # No initialization/logging on needed in Linux
def __exit__(self, exc_type, exc_val, exc_tb):
# delete the user.
commands_to_delete_user = get_linux_commands_to_delete_user(self.username)
logger.debug("Trying to delete {} with commands {}".format(self.username, str(commands_to_delete_user)))
_ = subprocess.check_output(" ".join(commands_to_delete_user), stderr=subprocess.STDOUT, shell=True)
class AutoNewWindowsUser(AutoNewUser):
"""
See AutoNewUser's documentation for details.
"""
def __init__(self, username, password):
"""
Creates a user with the username + password.
:raises: subprocess.CalledProcessError if failed to add the user.
"""
super(AutoNewWindowsUser, self).__init__(username, password)
self.username = username
self.password = password
@ -65,14 +120,7 @@ class AutoNewUser(object):
# Try to disable and then delete the user.
self.try_deactivate_user()
self.try_disable_user()
def try_disable_user(self):
try:
_ = subprocess.check_output(
get_windows_commands_to_delete_user(self.username), stderr=subprocess.STDOUT, shell=True)
except Exception as err:
raise NewUserError("Can't delete user {}. Info: {}".format(self.username, err))
self.try_delete_user()
def try_deactivate_user(self):
try:
@ -80,3 +128,10 @@ class AutoNewUser(object):
get_windows_commands_to_deactivate_user(self.username), stderr=subprocess.STDOUT, shell=True)
except Exception as err:
raise NewUserError("Can't deactivate user {}. Info: {}".format(self.username, err))
def try_delete_user(self):
try:
_ = subprocess.check_output(
get_windows_commands_to_delete_user(self.username), stderr=subprocess.STDOUT, shell=True)
except Exception as err:
raise NewUserError("Can't delete user {}. Info: {}".format(self.username, err))