497 lines
20 KiB
Python
497 lines
20 KiB
Python
import pytest
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from stix2 import parse
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from stix2.datastore.filters import Filter, apply_common_filters
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from stix2.utils import STIXdatetime, parse_into_datetime
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stix_objs = [
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{
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"created": "2017-01-27T13:49:53.997Z",
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"description": "\n\nTITLE:\n\tPoison Ivy",
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"id": "malware--fdd60b30-b67c-41e3-b0b9-f01faf20d111",
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"spec_version": "2.1",
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"malware_types": [
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"remote-access-trojan",
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],
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"modified": "2017-01-27T13:49:53.997Z",
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"name": "Poison Ivy",
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"type": "malware",
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"is_family": False,
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},
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{
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"created": "2014-05-08T09:00:00.000Z",
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"id": "indicator--a932fcc6-e032-476c-826f-cb970a5a1ade",
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"indicator_types": [
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"file-hash-watchlist",
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],
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"modified": "2014-05-08T09:00:00.000Z",
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"name": "File hash for Poison Ivy variant",
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"pattern": "[file:hashes.'SHA-256' = 'ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c']",
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"spec_version": "2.1",
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"type": "indicator",
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"valid_from": "2014-05-08T09:00:00.000000Z",
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},
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{
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"created": "2014-05-08T09:00:00.000Z",
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"granular_markings": [
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{
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"marking_ref": "marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed",
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"selectors": [
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"relationship_type",
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],
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},
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],
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"id": "relationship--2f9a9aa9-108a-4333-83e2-4fb25add0463",
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"modified": "2014-05-08T09:00:00.000Z",
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"object_marking_refs": [
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"marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9",
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],
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"relationship_type": "indicates",
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"revoked": True,
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"source_ref": "indicator--a932fcc6-e032-476c-826f-cb970a5a1ade",
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"spec_version": "2.1",
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"target_ref": "malware--fdd60b30-b67c-41e3-b0b9-f01faf20d111",
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"type": "relationship",
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},
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{
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"id": "vulnerability--ee916c28-c7a4-4d0d-ad56-a8d357f89fef",
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"spec_version": "2.1",
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"created": "2016-02-14T00:00:00.000Z",
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"created_by_ref": "identity--f1350682-3290-4e0d-be58-69e290537647",
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"modified": "2016-02-14T00:00:00.000Z",
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"type": "vulnerability",
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"name": "CVE-2014-0160",
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"description": "The (1) TLS...",
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"external_references": [
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{
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"source_name": "cve",
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"external_id": "CVE-2014-0160",
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},
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],
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"labels": ["heartbleed", "has-logo"],
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},
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{
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"type": "observed-data",
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"spec_version": "2.1",
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"id": "observed-data--b67d30ff-02ac-498a-92f9-32f845f448cf",
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"created_by_ref": "identity--f431f809-377b-45e0-aa1c-6a4751cae5ff",
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"created": "2016-04-06T19:58:16.000Z",
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"modified": "2016-04-06T19:58:16.000Z",
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"first_observed": "2015-12-21T19:00:00Z",
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"last_observed": "2015-12-21T19:00:00Z",
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"number_observed": 1,
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"objects": {
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"0": {
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"type": "file",
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"name": "HAL 9000.exe",
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},
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},
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},
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]
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filters = [
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Filter("type", "!=", "relationship"),
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Filter("id", "=", "relationship--2f9a9aa9-108a-4333-83e2-4fb25add0463"),
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Filter("malware_types", "in", "remote-access-trojan"),
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Filter("created", ">", "2015-01-01T01:00:00.000Z"),
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Filter("revoked", "=", True),
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Filter("revoked", "!=", True),
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Filter("object_marking_refs", "=", "marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9"),
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Filter("granular_markings.selectors", "in", "relationship_type"),
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Filter("granular_markings.marking_ref", "=", "marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed"),
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Filter("external_references.external_id", "in", "CVE-2014-0160,CVE-2017-6608"),
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Filter("created_by_ref", "=", "identity--f1350682-3290-4e0d-be58-69e290537647"),
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Filter("object_marking_refs", "=", "marking-definition--613f2e26-0000-4000-8000-b8e91df99dc9"),
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Filter("granular_markings.selectors", "in", "description"),
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Filter("external_references.source_name", "=", "CVE"),
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Filter("objects", "=", {"0": {"type": "file", "name": "HAL 9000.exe"}}),
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Filter("objects", "contains", {"type": "file", "name": "HAL 9000.exe"}),
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Filter("labels", "contains", "heartbleed"),
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]
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# same as above objects but converted to real Python STIX2 objects
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# to test filters against true Python STIX2 objects
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real_stix_objs = [parse(stix_obj) for stix_obj in stix_objs]
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def test_filter_ops_check():
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# invalid filters - non supported operators
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with pytest.raises(ValueError) as excinfo:
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# create Filter that has an operator that is not allowed
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Filter('modified', '*', 'not supported operator')
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assert str(excinfo.value) == "Filter operator '*' not supported for specified property: 'modified'"
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with pytest.raises(ValueError) as excinfo:
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Filter("type", "%", "4")
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assert "Filter operator '%' not supported for specified property" in str(excinfo.value)
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def test_filter_value_type_check():
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# invalid filters - non supported value types
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with pytest.raises(TypeError) as excinfo:
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Filter('created', '=', object())
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# On Python 2, the type of object() is `<type 'object'>` On Python 3, it's `<class 'object'>`.
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assert any([s in str(excinfo.value) for s in ["<type 'object'>", "'<class 'object'>'"]])
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assert "is not supported. The type must be a Python immutable type or dictionary" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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Filter("type", "=", complex(2, -1))
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assert any([s in str(excinfo.value) for s in ["<type 'complex'>", "'<class 'complex'>'"]])
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assert "is not supported. The type must be a Python immutable type or dictionary" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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Filter("type", "=", set([16, 23]))
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assert any([s in str(excinfo.value) for s in ["<type 'set'>", "'<class 'set'>'"]])
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assert "is not supported. The type must be a Python immutable type or dictionary" in str(excinfo.value)
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def test_filter_type_underscore_check():
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# check that Filters where property="type", value (name) doesnt have underscores
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with pytest.raises(ValueError) as excinfo:
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Filter("type", "=", "oh_underscore")
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assert "Filter for property 'type' cannot have its value 'oh_underscore'" in str(excinfo.value)
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def test_apply_common_filters0():
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# "Return any object whose type is not relationship"
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resp = list(apply_common_filters(stix_objs, [filters[0]]))
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ids = [r['id'] for r in resp]
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assert stix_objs[0]['id'] in ids
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assert stix_objs[1]['id'] in ids
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assert stix_objs[3]['id'] in ids
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assert len(ids) == 4
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resp = list(apply_common_filters(real_stix_objs, [filters[0]]))
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ids = [r.id for r in resp]
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assert real_stix_objs[0].id in ids
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assert real_stix_objs[1].id in ids
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assert real_stix_objs[3].id in ids
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assert len(ids) == 4
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def test_apply_common_filters1():
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# "Return any object that matched id relationship--2f9a9aa9-108a-4333-83e2-4fb25add0463"
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resp = list(apply_common_filters(stix_objs, [filters[1]]))
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assert resp[0]['id'] == stix_objs[2]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[1]]))
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assert resp[0].id == real_stix_objs[2].id
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assert len(resp) == 1
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def test_apply_common_filters2():
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# "Return any object that contains remote-access-trojan in labels"
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resp = list(apply_common_filters(stix_objs, [filters[2]]))
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assert resp[0]['id'] == stix_objs[0]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[2]]))
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assert resp[0].id == real_stix_objs[0].id
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assert len(resp) == 1
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def test_apply_common_filters3():
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# "Return any object created after 2015-01-01T01:00:00.000Z"
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resp = list(apply_common_filters(stix_objs, [filters[3]]))
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assert resp[0]['id'] == stix_objs[0]['id']
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assert len(resp) == 3
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resp = list(apply_common_filters(real_stix_objs, [filters[3]]))
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assert resp[0].id == real_stix_objs[0].id
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assert len(resp) == 3
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def test_apply_common_filters4():
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# "Return any revoked object"
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resp = list(apply_common_filters(stix_objs, [filters[4]]))
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assert resp[0]['id'] == stix_objs[2]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[4]]))
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assert resp[0].id == real_stix_objs[2].id
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assert len(resp) == 1
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def test_apply_common_filters5():
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# "Return any object whose not revoked"
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resp = list(apply_common_filters(stix_objs, [filters[5]]))
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assert len(resp) == 0
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resp = list(apply_common_filters(real_stix_objs, [filters[5]]))
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assert len(resp) == 4
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def test_apply_common_filters6():
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# "Return any object that matches marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9 in object_marking_refs"
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resp = list(apply_common_filters(stix_objs, [filters[6]]))
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assert resp[0]['id'] == stix_objs[2]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[6]]))
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assert resp[0].id == real_stix_objs[2].id
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assert len(resp) == 1
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def test_apply_common_filters7():
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# "Return any object that contains relationship_type in their selectors AND
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# also has marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed in marking_ref"
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resp = list(apply_common_filters(stix_objs, [filters[7], filters[8]]))
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assert resp[0]['id'] == stix_objs[2]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[7], filters[8]]))
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assert resp[0].id == real_stix_objs[2].id
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assert len(resp) == 1
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def test_apply_common_filters8():
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# "Return any object that contains CVE-2014-0160,CVE-2017-6608 in their external_id"
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resp = list(apply_common_filters(stix_objs, [filters[9]]))
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assert resp[0]['id'] == stix_objs[3]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[9]]))
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assert resp[0].id == real_stix_objs[3].id
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assert len(resp) == 1
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def test_apply_common_filters9():
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# "Return any object that matches created_by_ref identity--00000000-0000-0000-0000-b8e91df99dc9"
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resp = list(apply_common_filters(stix_objs, [filters[10]]))
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[10]]))
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assert len(resp) == 1
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def test_apply_common_filters10():
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# "Return any object that matches marking-definition--613f2e26-0000-4000-8000-b8e91df99dc9 in object_marking_refs" (None)
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resp = list(apply_common_filters(stix_objs, [filters[11]]))
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assert len(resp) == 0
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resp = list(apply_common_filters(real_stix_objs, [filters[11]]))
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assert len(resp) == 0
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def test_apply_common_filters11():
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# "Return any object that contains description in its selectors" (None)
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resp = list(apply_common_filters(stix_objs, [filters[12]]))
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assert len(resp) == 0
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resp = list(apply_common_filters(real_stix_objs, [filters[12]]))
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assert len(resp) == 0
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def test_apply_common_filters12():
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# "Return any object that matches CVE in source_name" (None, case sensitive)
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resp = list(apply_common_filters(stix_objs, [filters[13]]))
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assert len(resp) == 0
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resp = list(apply_common_filters(real_stix_objs, [filters[13]]))
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assert len(resp) == 0
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def test_apply_common_filters13():
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# Return any object that matches file object in "objects"
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resp = list(apply_common_filters(stix_objs, [filters[14]]))
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assert resp[0]["id"] == stix_objs[4]["id"]
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assert len(resp) == 1
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# important additional check to make sure original File dict was
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# not converted to File object. (this was a deep bug found)
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assert isinstance(resp[0]["objects"]["0"], dict)
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resp = list(apply_common_filters(real_stix_objs, [filters[14]]))
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assert resp[0].id == real_stix_objs[4].id
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assert len(resp) == 1
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def test_apply_common_filters14():
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# Return any object that contains a specific File Cyber Observable Object
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resp = list(apply_common_filters(stix_objs, [filters[15]]))
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assert resp[0]['id'] == stix_objs[4]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[15]]))
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assert resp[0].id == real_stix_objs[4].id
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assert len(resp) == 1
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def test_apply_common_filters15():
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# Return any object that contains 'heartbleed' in "labels"
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resp = list(apply_common_filters(stix_objs, [filters[16]]))
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assert resp[0]['id'] == stix_objs[3]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs, [filters[16]]))
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assert resp[0].id == real_stix_objs[3].id
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assert len(resp) == 1
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def test_datetime_filter_behavior():
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"""if a filter is initialized with its value being a datetime object
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OR the STIX object property being filtered on is a datetime object, all
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resulting comparisons executed are done on the string representations
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of the datetime objects, as the Filter functionality will convert
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all datetime objects to there string forms using format_datetim()
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This test makes sure all datetime comparisons are carried out correctly
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"""
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filter_with_dt_obj = Filter("created", "=", parse_into_datetime("2016-02-14T00:00:00.000Z", "millisecond"))
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filter_with_str = Filter("created", "=", "2016-02-14T00:00:00.000Z")
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# check that filter value is converted from datetime to str
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assert isinstance(filter_with_dt_obj.value, str)
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# compare datetime string to filter w/ datetime obj
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resp = list(apply_common_filters(stix_objs, [filter_with_dt_obj]))
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assert len(resp) == 1
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assert resp[0]["id"] == "vulnerability--ee916c28-c7a4-4d0d-ad56-a8d357f89fef"
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# compare datetime obj to filter w/ datetime obj
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resp = list(apply_common_filters(real_stix_objs, [filter_with_dt_obj]))
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assert len(resp) == 1
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assert resp[0]["id"] == "vulnerability--ee916c28-c7a4-4d0d-ad56-a8d357f89fef"
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assert isinstance(resp[0].created, STIXdatetime) # make sure original object not altered
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# compare datetime string to filter w/ str
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resp = list(apply_common_filters(stix_objs, [filter_with_str]))
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assert len(resp) == 1
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assert resp[0]["id"] == "vulnerability--ee916c28-c7a4-4d0d-ad56-a8d357f89fef"
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# compare datetime obj to filter w/ str
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resp = list(apply_common_filters(real_stix_objs, [filter_with_str]))
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assert len(resp) == 1
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assert resp[0]["id"] == "vulnerability--ee916c28-c7a4-4d0d-ad56-a8d357f89fef"
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assert isinstance(resp[0].created, STIXdatetime) # make sure original object not altered
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def test_filters0(stix_objs2, real_stix_objs2):
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# "Return any object modified before 2017-01-28T13:49:53.935Z"
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resp = list(apply_common_filters(stix_objs2, [Filter("modified", "<", "2017-01-28T13:49:53.935Z")]))
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assert resp[0]['id'] == stix_objs2[1]['id']
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assert len(resp) == 2
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resp = list(apply_common_filters(real_stix_objs2, [Filter("modified", "<", parse_into_datetime("2017-01-28T13:49:53.935Z"))]))
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assert resp[0].id == real_stix_objs2[1].id
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assert len(resp) == 2
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def test_filters1(stix_objs2, real_stix_objs2):
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# "Return any object modified after 2017-01-28T13:49:53.935Z"
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resp = list(apply_common_filters(stix_objs2, [Filter("modified", ">", "2017-01-28T13:49:53.935Z")]))
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assert resp[0]['id'] == stix_objs2[0]['id']
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assert len(resp) == 1
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resp = list(apply_common_filters(real_stix_objs2, [Filter("modified", ">", parse_into_datetime("2017-01-28T13:49:53.935Z"))]))
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assert resp[0].id == real_stix_objs2[0].id
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assert len(resp) == 1
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def test_filters2(stix_objs2, real_stix_objs2):
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# "Return any object modified after or on 2017-01-28T13:49:53.935Z"
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resp = list(apply_common_filters(stix_objs2, [Filter("modified", ">=", "2017-01-27T13:49:53.935Z")]))
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assert resp[0]['id'] == stix_objs2[0]['id']
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assert len(resp) == 3
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resp = list(apply_common_filters(real_stix_objs2, [Filter("modified", ">=", parse_into_datetime("2017-01-27T13:49:53.935Z"))]))
|
|
assert resp[0].id == real_stix_objs2[0].id
|
|
assert len(resp) == 3
|
|
|
|
|
|
def test_filters3(stix_objs2, real_stix_objs2):
|
|
# "Return any object modified before or on 2017-01-28T13:49:53.935Z"
|
|
resp = list(apply_common_filters(stix_objs2, [Filter("modified", "<=", "2017-01-27T13:49:53.935Z")]))
|
|
assert resp[0]['id'] == stix_objs2[1]['id']
|
|
assert len(resp) == 2
|
|
|
|
# "Return any object modified before or on 2017-01-28T13:49:53.935Z"
|
|
fv = Filter("modified", "<=", parse_into_datetime("2017-01-27T13:49:53.935Z"))
|
|
resp = list(apply_common_filters(real_stix_objs2, [fv]))
|
|
assert resp[0].id == real_stix_objs2[1].id
|
|
assert len(resp) == 2
|
|
|
|
|
|
def test_filters4():
|
|
# Assert invalid Filter cannot be created
|
|
with pytest.raises(ValueError) as excinfo:
|
|
Filter("modified", "?", "2017-01-27T13:49:53.935Z")
|
|
assert str(excinfo.value) == (
|
|
"Filter operator '?' not supported "
|
|
"for specified property: 'modified'"
|
|
)
|
|
|
|
|
|
def test_filters5(stix_objs2, real_stix_objs2):
|
|
# "Return any object whose id is not indicator--00000000-0000-4000-8000-000000000002"
|
|
resp = list(apply_common_filters(stix_objs2, [Filter("id", "!=", "indicator--00000000-0000-4000-8000-000000000002")]))
|
|
assert resp[0]['id'] == stix_objs2[0]['id']
|
|
assert len(resp) == 1
|
|
|
|
resp = list(apply_common_filters(real_stix_objs2, [Filter("id", "!=", "indicator--00000000-0000-4000-8000-000000000002")]))
|
|
assert resp[0].id == real_stix_objs2[0].id
|
|
assert len(resp) == 1
|
|
|
|
|
|
def test_filters6(stix_objs2, real_stix_objs2):
|
|
# Test filtering on non-common property
|
|
resp = list(apply_common_filters(stix_objs2, [Filter("name", "=", "Malicious site hosting downloader")]))
|
|
assert resp[0]['id'] == stix_objs2[0]['id']
|
|
assert len(resp) == 3
|
|
|
|
resp = list(apply_common_filters(real_stix_objs2, [Filter("name", "=", "Malicious site hosting downloader")]))
|
|
assert resp[0].id == real_stix_objs2[0].id
|
|
assert len(resp) == 3
|
|
|
|
|
|
def test_filters7(stix_objs2, real_stix_objs2):
|
|
# Test filtering on embedded property
|
|
obsvd_data_obj = {
|
|
"type": "observed-data",
|
|
"spec_version": "2.1",
|
|
"id": "observed-data--b67d30ff-02ac-498a-92f9-32f845f448cf",
|
|
"created_by_ref": "identity--f431f809-377b-45e0-aa1c-6a4751cae5ff",
|
|
"created": "2016-04-06T19:58:16.000Z",
|
|
"modified": "2016-04-06T19:58:16.000Z",
|
|
"first_observed": "2015-12-21T19:00:00Z",
|
|
"last_observed": "2015-12-21T19:00:00Z",
|
|
"number_observed": 50,
|
|
"objects": {
|
|
"0": {
|
|
"type": "file",
|
|
"hashes": {
|
|
"SHA-256": "35a01331e9ad96f751278b891b6ea09699806faedfa237d40513d92ad1b7100f",
|
|
},
|
|
"extensions": {
|
|
"pdf-ext": {
|
|
"version": "1.7",
|
|
"document_info_dict": {
|
|
"Title": "Sample document",
|
|
"Author": "Adobe Systems Incorporated",
|
|
"Creator": "Adobe FrameMaker 5.5.3 for Power Macintosh",
|
|
"Producer": "Acrobat Distiller 3.01 for Power Macintosh",
|
|
"CreationDate": "20070412090123-02",
|
|
},
|
|
"pdfid0": "DFCE52BD827ECF765649852119D",
|
|
"pdfid1": "57A1E0F9ED2AE523E313C",
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
stix_objects = list(stix_objs2) + [obsvd_data_obj]
|
|
real_stix_objects = list(real_stix_objs2) + [parse(obsvd_data_obj)]
|
|
|
|
resp = list(apply_common_filters(stix_objects, [Filter("objects.0.extensions.pdf-ext.version", ">", "1.2")]))
|
|
assert resp[0]['id'] == stix_objects[3]['id']
|
|
assert len(resp) == 1
|
|
|
|
resp = list(apply_common_filters(real_stix_objects, [Filter("objects.0.extensions.pdf-ext.version", ">", "1.2")]))
|
|
assert resp[0].id == real_stix_objects[3].id
|
|
assert len(resp) == 1
|