Merge pull request #2201 from guardicore/2176-publish-credentials-stolen-in-mimikatz

CredentialsStolenEvent in MimikatzCredentialCollector

monkey/infection_monkey/credential_collectors/mimikatz_collector/mimikatz_credential_collector.py

@@ -2,6 +2,8 @@ import logging
 from typing import Sequence
 
 from common.credentials import Credentials, LMHash, NTHash, Password, Username
+from common.event_queue import IEventQueue
+from common.events import CredentialsStolenEvent
 from infection_monkey.i_puppet import ICredentialCollector
 from infection_monkey.model import USERNAME_PREFIX
 
@@ -11,12 +13,34 @@ from .windows_credentials import WindowsCredentials
 logger = logging.getLogger(__name__)
 
 
+MIMIKATZ_CREDENTIAL_COLLECTOR_TAG = "mimikatz-credentials-collector"
+T1003_ATTACK_TECHNIQUE_TAG = "attack-t1003"
+T1005_ATTACK_TECHNIQUE_TAG = "attack-t1005"
+
+MIMIKATZ_EVENT_TAGS = frozenset(
+    (
+        MIMIKATZ_CREDENTIAL_COLLECTOR_TAG,
+        T1003_ATTACK_TECHNIQUE_TAG,
+        T1005_ATTACK_TECHNIQUE_TAG,
+    )
+)
+
+
 class MimikatzCredentialCollector(ICredentialCollector):
+    def __init__(self, event_queue: IEventQueue):
+        self._event_queue = event_queue
+
     def collect_credentials(self, options=None) -> Sequence[Credentials]:
         logger.info("Attempting to collect windows credentials with pypykatz.")
         windows_credentials = pypykatz_handler.get_windows_creds()
+
         logger.info(f"Pypykatz gathered {len(windows_credentials)} credentials.")
-        return MimikatzCredentialCollector._to_credentials(windows_credentials)
+
+        collected_credentials = MimikatzCredentialCollector._to_credentials(windows_credentials)
+
+        self._publish_credentials_stolen_event(collected_credentials)
+
+        return collected_credentials
 
     @staticmethod
     def _to_credentials(windows_credentials: Sequence[WindowsCredentials]) -> Sequence[Credentials]:
@@ -49,3 +73,11 @@ class MimikatzCredentialCollector(ICredentialCollector):
                 credentials.append(Credentials(identity, None))
 
         return credentials
+
+    def _publish_credentials_stolen_event(self, collected_credentials: Sequence[Credentials]):
+        credentials_stolen_event = CredentialsStolenEvent(
+            tags=MIMIKATZ_EVENT_TAGS,
+            stolen_credentials=collected_credentials,
+        )
+
+        self._event_queue.publish(credentials_stolen_event)

monkey/infection_monkey/credential_collectors/ssh_collector/ssh_handler.py

@@ -20,12 +20,14 @@ T1003_ATTACK_TECHNIQUE_TAG = "attack-t1003"
 T1005_ATTACK_TECHNIQUE_TAG = "attack-t1005"
 T1145_ATTACK_TECHNIQUE_TAG = "attack-t1145"
 
-SSH_COLLECTOR_EVENT_TAG = {
+SSH_COLLECTOR_EVENT_TAGS = frozenset(
+    (
         SSH_CREDENTIAL_COLLECTOR_TAG,
         T1003_ATTACK_TECHNIQUE_TAG,
         T1005_ATTACK_TECHNIQUE_TAG,
         T1145_ATTACK_TECHNIQUE_TAG,
-}
+    )
+)
 
 
 def get_ssh_info(
@@ -165,7 +167,7 @@ def to_credentials(ssh_info: Iterable[Dict]) -> Sequence[Credentials]:
 
 def _publish_credentials_stolen_event(collected_credentials: Credentials, event_queue: IEventQueue):
     credentials_stolen_event = CredentialsStolenEvent(
-        tags=frozenset(SSH_COLLECTOR_EVENT_TAG),
+        tags=SSH_COLLECTOR_EVENT_TAGS,
         stolen_credentials=[collected_credentials],
     )
 

monkey/tests/unit_tests/common/event_queue/test_pypubsub_event_queue.py

@@ -1,6 +1,6 @@
 from dataclasses import dataclass
 from ipaddress import IPv4Address
-from typing import FrozenSet, Union
+from typing import Callable, FrozenSet, Union
 from uuid import UUID
 
 import pytest
@@ -31,7 +31,13 @@ class TestEvent2(AbstractEvent):
     tags: FrozenSet = frozenset()
 
 
-def new_subscriber() -> EventSubscriber:
+@pytest.fixture
+def event_queue() -> IEventQueue:
+    return PyPubSubEventQueue(Publisher())
+
+
+@pytest.fixture
+def event_queue_subscriber() -> Callable[[AbstractEvent], None]:
     def fn(event: AbstractEvent):
         fn.call_count += 1
         fn.call_types.add(event.__class__)
@@ -44,68 +50,64 @@ def new_subscriber() -> EventSubscriber:
     return fn
 
 
-@pytest.fixture
-def subscriber() -> EventSubscriber:
-    return new_subscriber()
-
-
-@pytest.fixture
-def event_queue() -> IEventQueue:
-    return PyPubSubEventQueue(Publisher())
-
-
-def test_subscribe_all(event_queue: IEventQueue, subscriber: EventSubscriber):
-    event_queue.subscribe_all_events(subscriber)
+def test_subscribe_all(event_queue: IEventQueue, event_queue_subscriber: EventSubscriber):
+    event_queue.subscribe_all_events(event_queue_subscriber)
 
     event_queue.publish(TestEvent1(tags=frozenset({EVENT_TAG_1, EVENT_TAG_2})))
     event_queue.publish(TestEvent1(tags=frozenset({EVENT_TAG_2})))
     event_queue.publish(TestEvent1(tags=frozenset({"secret_tag"})))
     event_queue.publish(TestEvent2())
 
-    assert subscriber.call_count == 4
-    assert TestEvent1 in subscriber.call_types
-    assert TestEvent2 in subscriber.call_types
+    assert event_queue_subscriber.call_count == 4
+    assert TestEvent1 in event_queue_subscriber.call_types
+    assert TestEvent2 in event_queue_subscriber.call_types
 
 
 @pytest.mark.parametrize("type_to_subscribe", [TestEvent1, TestEvent2])
-def test_subscribe_types(event_queue: IEventQueue, subscriber: EventSubscriber, type_to_subscribe):
-    event_queue.subscribe_type(type_to_subscribe, subscriber)
+def test_subscribe_types(
+    event_queue: IEventQueue, event_queue_subscriber: EventSubscriber, type_to_subscribe
+):
+    event_queue.subscribe_type(type_to_subscribe, event_queue_subscriber)
 
     event_queue.publish(TestEvent1())
     event_queue.publish(TestEvent2())
 
-    assert subscriber.call_count == 1
-    assert type_to_subscribe in subscriber.call_types
+    assert event_queue_subscriber.call_count == 1
+    assert type_to_subscribe in event_queue_subscriber.call_types
 
 
-def test_subscribe_tags_single_type(event_queue: IEventQueue, subscriber: EventSubscriber):
-    event_queue.subscribe_tag(EVENT_TAG_1, subscriber)
+def test_subscribe_tags_single_type(
+    event_queue: IEventQueue, event_queue_subscriber: EventSubscriber
+):
+    event_queue.subscribe_tag(EVENT_TAG_1, event_queue_subscriber)
 
     event_queue.publish(TestEvent1(tags=frozenset({EVENT_TAG_1, EVENT_TAG_2})))
     event_queue.publish(TestEvent2(tags=frozenset({EVENT_TAG_2})))
 
-    assert subscriber.call_count == 1
-    assert len(subscriber.call_types) == 1
-    assert TestEvent1 in subscriber.call_types
-    assert EVENT_TAG_1 in subscriber.call_tags
+    assert event_queue_subscriber.call_count == 1
+    assert len(event_queue_subscriber.call_types) == 1
+    assert TestEvent1 in event_queue_subscriber.call_types
+    assert EVENT_TAG_1 in event_queue_subscriber.call_tags
 
 
-def test_subscribe_tags_multiple_types(event_queue: IEventQueue, subscriber: EventSubscriber):
-    event_queue.subscribe_tag(EVENT_TAG_2, subscriber)
+def test_subscribe_tags_multiple_types(
+    event_queue: IEventQueue, event_queue_subscriber: EventSubscriber
+):
+    event_queue.subscribe_tag(EVENT_TAG_2, event_queue_subscriber)
 
     event_queue.publish(TestEvent1(tags=frozenset({EVENT_TAG_1, EVENT_TAG_2})))
     event_queue.publish(TestEvent2(tags=frozenset({EVENT_TAG_2})))
 
-    assert subscriber.call_count == 2
-    assert len(subscriber.call_types) == 2
-    assert TestEvent1 in subscriber.call_types
-    assert TestEvent2 in subscriber.call_types
-    assert {EVENT_TAG_1, EVENT_TAG_2}.issubset(subscriber.call_tags)
+    assert event_queue_subscriber.call_count == 2
+    assert len(event_queue_subscriber.call_types) == 2
+    assert TestEvent1 in event_queue_subscriber.call_types
+    assert TestEvent2 in event_queue_subscriber.call_types
+    assert {EVENT_TAG_1, EVENT_TAG_2}.issubset(event_queue_subscriber.call_tags)
 
 
-def test_type_tag_collision(event_queue: IEventQueue, subscriber: EventSubscriber):
-    event_queue.subscribe_type(TestEvent1, subscriber)
+def test_type_tag_collision(event_queue: IEventQueue, event_queue_subscriber: EventSubscriber):
+    event_queue.subscribe_type(TestEvent1, event_queue_subscriber)
 
     event_queue.publish(TestEvent2(tags=frozenset({TestEvent1.__name__})))
 
-    assert subscriber.call_count == 0
+    assert event_queue_subscriber.call_count == 0

monkey/tests/unit_tests/infection_monkey/credential_collectors/test_mimikatz_collector.py

@@ -1,9 +1,15 @@
 from typing import Sequence
+from unittest.mock import MagicMock
 
 import pytest
 
 from common.credentials import Credentials, LMHash, NTHash, Password, Username
+from common.event_queue import IEventQueue
+from common.events import CredentialsStolenEvent
 from infection_monkey.credential_collectors import MimikatzCredentialCollector
+from infection_monkey.credential_collectors.mimikatz_collector.mimikatz_credential_collector import (  # noqa: E501
+    MIMIKATZ_EVENT_TAGS,
+)
 from infection_monkey.credential_collectors.mimikatz_collector.windows_credentials import (
     WindowsCredentials,
 )
@@ -18,7 +24,8 @@ def patch_pypykatz(win_creds: [WindowsCredentials], monkeypatch):
 
 
 def collect_credentials() -> Sequence[Credentials]:
-    return MimikatzCredentialCollector().collect_credentials()
+    mock_event_queue = MagicMock(spec=IEventQueue)
+    return MimikatzCredentialCollector(mock_event_queue).collect_credentials()
 
 
 @pytest.mark.parametrize(
@@ -110,3 +117,46 @@ def test_pypykatz_result_parsing_no_secrets(monkeypatch):
     collected_credentials = collect_credentials()
     assert len(collected_credentials) == 1
     assert collected_credentials == expected_credentials
+
+
+def test_mimikatz_credentials_stolen_event_published(monkeypatch):
+    mock_event_queue = MagicMock(spec=IEventQueue)
+    patch_pypykatz([], monkeypatch)
+
+    mimikatz_credential_collector = MimikatzCredentialCollector(mock_event_queue)
+    mimikatz_credential_collector.collect_credentials()
+
+    mock_event_queue.publish.assert_called_once()
+
+    mock_event_queue_call_args = mock_event_queue.publish.call_args[0][0]
+
+    assert isinstance(mock_event_queue_call_args, CredentialsStolenEvent)
+
+
+def test_mimikatz_credentials_stolen_event_tags(monkeypatch):
+    mock_event_queue = MagicMock(spec=IEventQueue)
+    patch_pypykatz([], monkeypatch)
+
+    mimikatz_credential_collector = MimikatzCredentialCollector(mock_event_queue)
+    mimikatz_credential_collector.collect_credentials()
+
+    mock_event_queue_call_args = mock_event_queue.publish.call_args[0][0]
+
+    assert mock_event_queue_call_args.tags == MIMIKATZ_EVENT_TAGS
+
+
+def test_mimikatz_credentials_stolen_event_stolen_credentials(monkeypatch):
+    mock_event_queue = MagicMock(spec=IEventQueue)
+    win_creds = [
+        WindowsCredentials(
+            username="user2", password="secret2", lm_hash="0182BD0BD4444BF8FC83B5D9042EED2E"
+        ),
+    ]
+    patch_pypykatz(win_creds, monkeypatch)
+
+    mimikatz_credential_collector = MimikatzCredentialCollector(mock_event_queue)
+    collected_credentials = mimikatz_credential_collector.collect_credentials()
+
+    mock_event_queue_call_args = mock_event_queue.publish.call_args[0][0]
+
+    assert mock_event_queue_call_args.stolen_credentials == collected_credentials