cti-python-stix2/stix2/test/v21/test_malware.py

215 lines
6.8 KiB
Python

import datetime as dt
import json
import pytest
import pytz
import stix2
from ...exceptions import InvalidValueError, PropertyPresenceError
from .constants import FAKE_TIME, MALWARE_ID, MALWARE_KWARGS
EXPECTED_MALWARE = """{
"type": "malware",
"spec_version": "2.1",
"id": "malware--9c4638ec-f1de-4ddb-abf4-1b760417654e",
"created": "2016-05-12T08:17:27.000Z",
"modified": "2016-05-12T08:17:27.000Z",
"name": "Cryptolocker",
"is_family": false
}"""
def test_malware_with_all_required_properties():
now = dt.datetime(2016, 5, 12, 8, 17, 27, tzinfo=pytz.utc)
malware = stix2.v21.Malware(
type="malware",
id=MALWARE_ID,
created=now,
modified=now,
name="Cryptolocker",
is_family=False,
)
assert malware.serialize(pretty=True) == EXPECTED_MALWARE
def test_malware_autogenerated_properties(malware):
assert malware.type == 'malware'
assert malware.id == 'malware--00000000-0000-4000-8000-000000000001'
assert malware.created == FAKE_TIME
assert malware.modified == FAKE_TIME
assert malware.malware_types == ['ransomware']
assert malware.name == "Cryptolocker"
assert malware['type'] == 'malware'
assert malware['id'] == 'malware--00000000-0000-4000-8000-000000000001'
assert malware['created'] == FAKE_TIME
assert malware['modified'] == FAKE_TIME
assert malware['malware_types'] == ['ransomware']
assert malware['name'] == "Cryptolocker"
def test_malware_type_must_be_malware():
with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
stix2.v21.Malware(type='xxx', **MALWARE_KWARGS)
assert excinfo.value.cls == stix2.v21.Malware
assert excinfo.value.prop_name == "type"
assert excinfo.value.reason == "must equal 'malware'."
assert str(excinfo.value) == "Invalid value for Malware 'type': must equal 'malware'."
def test_malware_id_must_start_with_malware():
with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
stix2.v21.Malware(id='my-prefix--', **MALWARE_KWARGS)
assert excinfo.value.cls == stix2.v21.Malware
assert excinfo.value.prop_name == "id"
assert excinfo.value.reason == "must start with 'malware--'."
assert str(excinfo.value) == "Invalid value for Malware 'id': must start with 'malware--'."
def test_malware_required_properties():
with pytest.raises(stix2.exceptions.MissingPropertiesError) as excinfo:
stix2.v21.Malware()
assert excinfo.value.cls == stix2.v21.Malware
assert excinfo.value.properties == ["is_family"]
def test_malware_required_property_name():
with pytest.raises(stix2.exceptions.MissingPropertiesError) as excinfo:
stix2.v21.Malware(malware_types=['ransomware'])
assert excinfo.value.cls == stix2.v21.Malware
assert excinfo.value.properties == ["is_family"]
def test_cannot_assign_to_malware_attributes(malware):
with pytest.raises(stix2.exceptions.ImmutableError) as excinfo:
malware.name = "Cryptolocker II"
assert str(excinfo.value) == "Cannot modify 'name' property in 'Malware' after creation."
def test_invalid_kwarg_to_malware():
with pytest.raises(stix2.exceptions.ExtraPropertiesError) as excinfo:
stix2.v21.Malware(my_custom_property="foo", **MALWARE_KWARGS)
assert excinfo.value.cls == stix2.v21.Malware
assert excinfo.value.properties == ['my_custom_property']
assert str(excinfo.value) == "Unexpected properties for Malware: (my_custom_property)."
@pytest.mark.parametrize(
"data", [
EXPECTED_MALWARE,
{
"type": "malware",
"spec_version": "2.1",
"id": MALWARE_ID,
"created": "2016-05-12T08:17:27.000Z",
"modified": "2016-05-12T08:17:27.000Z",
"name": "Cryptolocker",
"is_family": False,
},
],
)
def test_parse_malware(data):
mal = stix2.parse(data)
assert mal.type == 'malware'
assert mal.spec_version == '2.1'
assert mal.id == MALWARE_ID
assert mal.created == dt.datetime(2016, 5, 12, 8, 17, 27, tzinfo=pytz.utc)
assert mal.modified == dt.datetime(2016, 5, 12, 8, 17, 27, tzinfo=pytz.utc)
assert mal.name == 'Cryptolocker'
assert not mal.is_family
def test_parse_malware_invalid_types():
data = json.loads(EXPECTED_MALWARE)
data["malware_types"] = 1 # Oops, not a list
data = json.dumps(data)
with pytest.raises(InvalidValueError) as excinfo:
stix2.parse(data)
assert "Invalid value for Malware 'malware_types'" in str(excinfo.value)
def test_parse_malware_kill_chain_phases():
kill_chain = """
"kill_chain_phases": [
{
"kill_chain_name": "lockheed-martin-cyber-kill-chain",
"phase_name": "reconnaissance"
}
]"""
data = EXPECTED_MALWARE.replace('malware"', 'malware",%s' % kill_chain)
mal = stix2.parse(data, version="2.1")
assert mal.kill_chain_phases[0].kill_chain_name == "lockheed-martin-cyber-kill-chain"
assert mal.kill_chain_phases[0].phase_name == "reconnaissance"
assert mal['kill_chain_phases'][0]['kill_chain_name'] == "lockheed-martin-cyber-kill-chain"
assert mal['kill_chain_phases'][0]['phase_name'] == "reconnaissance"
def test_parse_malware_clean_kill_chain_phases():
kill_chain = """
"kill_chain_phases": [
{
"kill_chain_name": "lockheed-martin-cyber-kill-chain",
"phase_name": 1
}
]"""
data = EXPECTED_MALWARE.replace('2.1"', '2.1",%s' % kill_chain)
mal = stix2.parse(data, version="2.1")
assert mal['kill_chain_phases'][0]['phase_name'] == "1"
def test_malware_invalid_last_before_first():
with pytest.raises(ValueError) as excinfo:
stix2.v21.Malware(first_seen="2017-01-01T12:34:56.000Z", last_seen="2017-01-01T12:33:56.000Z", **MALWARE_KWARGS)
assert "'last_seen' must be greater than or equal to 'first_seen'" in str(excinfo.value)
def test_malware_family_no_name():
with pytest.raises(PropertyPresenceError):
stix2.parse({
"type": "malware",
"id": MALWARE_ID,
"spec_version": "2.1",
"is_family": True,
"malware_types": ["spyware"],
})
def test_malware_non_family_no_name():
stix2.parse({
"type": "malware",
"id": MALWARE_ID,
"spec_version": "2.1",
"is_family": False,
"malware_types": ["spyware"],
})
def test_malware_with_os_refs():
software = stix2.parse({
"type": "software",
"name": "SuperOS",
"spec_version": "2.1",
})
malware = stix2.parse({
"type": "malware",
"id": MALWARE_ID,
"spec_version": "2.1",
"is_family": False,
"malware_types": ["spyware"],
"operating_system_refs": [software],
})
assert malware["operating_system_refs"][0] == software["id"]