Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[Backport 2.17] fix for detectors with sigma aggregation rules #1376

Merged
merged 1 commit into from
Oct 23, 2024
Merged

[Backport 2.17] fix for detectors with sigma aggregation rules #1376

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 12 additions & 3 deletions src/main/java/org/opensearch/securityanalytics/mapper/IndexTemplateManager.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -115,13 +115,22 @@ public void upsertIndexTemplateWithAliasMappings(

upsertComponentTemplateStepListener.whenComplete( acknowledgedResponse -> {

// Find template which matches input index best
// Find template which matches input index best. starts by directly matching with input index and
// if not found matches with current write index.
String templateName =
MetadataIndexTemplateService.findV2Template(
state.metadata(),
normalizeIndexName(indexName),
false
);
if (templateName == null) {
templateName =
MetadataIndexTemplateService.findV2Template(
state.metadata(),
normalizeIndexName(cin),
false
);
}

if (templateName == null) {
// If we find conflicting templates(regardless of priority) and that template was created by us,
Expand Down Expand Up @@ -181,8 +190,8 @@ public void upsertIndexTemplateWithAliasMappings(
template = state.metadata().templatesV2().get(templateName);
if (template.composedOf().contains(componentName) == false) {
List<String> newComposedOf = new ArrayList<>(template.composedOf());
List<String> indexPatterns = List.of(computeIndexPattern(indexName));
;
List<String> indexPatterns = new ArrayList<>(template.indexPatterns());
indexPatterns.add(computeIndexPattern(indexName));
newComposedOf.add(componentName);

try {
Expand Down
8 changes: 7 additions & 1 deletion src/main/java/org/opensearch/securityanalytics/transport/TransportIndexDetectorAction.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -863,12 +863,16 @@ private IndexMonitorRequest createDocLevelMonitorMatchAllRequest(
}
}
tags.removeIf(Objects::isNull);

// if queryFieldNames is not passed, alerting doc-level monitor fetches entire log doc.
List<String> queryFieldNames = List.of("_id");
DocLevelQuery docLevelQuery = new DocLevelQuery(
monitorName,
monitorName + "doc",
Collections.emptyList(),
actualQuery,
new ArrayList<>(tags)
new ArrayList<>(tags),
queryFieldNames
);
docLevelQueries.add(docLevelQuery);

Expand Down Expand Up @@ -1037,6 +1041,8 @@ public void onResponse(GetIndexMappingsResponse getIndexMappingsResponse) {
boolQueryBuilder.must(timeRangeFilter);
searchSourceBuilder.query(boolQueryBuilder);
}
// query hits are not needed from this query part for aggregations.
searchSourceBuilder.size(0);
List<SearchInput> bucketLevelMonitorInputs = new ArrayList<>();
bucketLevelMonitorInputs.add(new SearchInput(indices, searchSourceBuilder));

Expand Down
39 changes: 38 additions & 1 deletion src/test/java/org/opensearch/securityanalytics/SecurityAnalyticsRestTestCase.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1729,7 +1729,8 @@ protected void createComposableIndexTemplate(String templateName, List<String> i
Collectors.joining(",", "\"", "\"")) +
"]," +
(componentTemplateName == null ? ("\"template\": {\"mappings\": {" + mappings + "}},") : "") +
(componentTemplateName != null ? ("\"composed_of\": [\"" + componentTemplateName + "\"],") : "") +
(componentTemplateName != null ? ("\"composed_of\": [\"" + componentTemplateName + "\"],\"template\": {" +
"\"settings\": {\"index\":{\"mapping\":{\"total_fields\":{\"limit\":\"5000\"}},\"number_of_shards\":\"18\",\"number_of_replicas\":\"1\"}}},") : "") +
"\"priority\":" + priority +
"}";
Response response = makeRequest(
Expand Down Expand Up @@ -1810,6 +1811,14 @@ protected void createDatastreamAPI(String datastreamName) throws IOException {
assertEquals(HttpStatus.SC_OK, response.getStatusLine().getStatusCode());
}

protected void createIndexAliasApi(String indexAlias, String indexName) throws IOException {
Request request = new Request("POST", "_aliases");
request.setJsonEntity("{\"actions\":[{\"add\":{\"index\":\"" + indexName + "\",\"alias\":\"" + indexAlias + "\", " +
"\"is_write_index\": true}}]}");
Response response = client().performRequest(request);
assertEquals(HttpStatus.SC_OK, response.getStatusLine().getStatusCode());
}


protected void deleteDatastreamAPI(String datastreamName) throws IOException {
Request request = new Request("DELETE", "_data_stream/" + datastreamName);
Expand Down Expand Up @@ -1852,6 +1861,34 @@ protected void createSampleDatastream(String datastreamName, String mappings, bo
createDatastreamAPI(datastreamName);
}

protected void createSampleIndexTemplate(String indexPattern, String mappings, boolean useComponentTemplate) throws IOException {
String indexName = indexPattern.substring(0, indexPattern.length() - 1);
String componentTemplateMappings = "\"properties\": {" +
" \"netflow.destination_transport_port\":{ \"type\": \"long\" }," +
" \"netflow.destination_ipv4_address\":{ \"type\": \"ip\" }" +
"}";

if (mappings != null) {
componentTemplateMappings = mappings;
}

if (useComponentTemplate) {
// Setup index_template
createComponentTemplateWithMappings(
"my_ds_component_template-" + indexName,
componentTemplateMappings
);
}
createComposableIndexTemplate(
"my_index_template_ds-" + indexName,
List.of(indexPattern),
useComponentTemplate ? "my_ds_component_template-" + indexName : null,
mappings,
false,
2
);
}

protected void restoreAlertsFindingsIMSettings() throws IOException {
updateClusterSetting(ALERT_HISTORY_ROLLOVER_PERIOD.getKey(), "720m");
updateClusterSetting(ALERT_HISTORY_MAX_DOCS.getKey(), "100000");
Expand Down
4 changes: 2 additions & 2 deletions src/test/java/org/opensearch/securityanalytics/TestHelpers.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1191,7 +1191,7 @@ public static String randomCloudtrailAggrRuleWithDotFields() {
" - lambda.amazonaws.com\n" +
" api.operation: \n" +
" - Invoke\n" +
" timeframe: 20m\n" +
" timeframe: 1m\n" +
" tags:\n" +
" - attack.privilege_escalation\n" +
" - attack.t1078";
Expand Down Expand Up @@ -2340,7 +2340,7 @@ public static String randomCloudtrailOcsfDoc() {
" },\n" +
" \"status\": \"Success\",\n" +
" \"status_id\": 1,\n" +
" \"time\": 1702952105000,\n" +
" \"time\": " + System.currentTimeMillis() + ",\n" +
" \"type_name\": \"Account Change: Detach Policy\",\n" +
" \"type_uid\": 300108,\n" +
" \"unmapped\": {\n" +
Expand Down
108 changes: 107 additions & 1 deletion src/test/java/org/opensearch/securityanalytics/resthandler/DetectorMonitorRestApiIT.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
import org.opensearch.action.search.SearchResponse;
import org.opensearch.client.Request;
import org.opensearch.client.Response;
import org.opensearch.common.settings.Settings;
import org.opensearch.commons.alerting.model.Monitor.MonitorType;
import org.opensearch.core.rest.RestStatus;
import org.opensearch.search.SearchHit;
Expand Down Expand Up @@ -2063,7 +2064,10 @@ public void testCreateDetectorWithCloudtrailAggrRuleWithDotFields() throws IOExc

@SuppressWarnings("unchecked")
public void testCreateDetectorWithCloudtrailAggrRuleWithEcsFields() throws IOException {
String index = createTestIndex("cloudtrail", cloudtrailOcsfMappings());
String index = "cloudtrail";
String indexAlias = "test_alias";

createIndex(index, Settings.EMPTY, cloudtrailOcsfMappings(), "\"" + indexAlias + "\":{\"is_write_index\": true}");

// Execute CreateMappingsAction to add alias mapping for index
Request createMappingRequest = new Request("POST", SecurityAnalyticsPlugin.MAPPER_BASE_URI);
Expand Down Expand Up @@ -2153,6 +2157,108 @@ public void testCreateDetectorWithCloudtrailAggrRuleWithEcsFields() throws IOExc
assertEquals(1, getFindingsBody.get("total_findings"));
}

@SuppressWarnings("unchecked")
public void testCreateDetectorWithCloudtrailAggrRuleWithRolloverIndexAliases() throws IOException, InterruptedException {
createSampleIndexTemplate("cloudtrail*", cloudtrailOcsfMappings(), true);
String index = createTestIndex("cloudtrail-000001", "");
createIndexAliasApi("ocsf_ct", "cloudtrail-000001");

// Execute CreateMappingsAction to add alias mapping for index
Request createMappingRequest = new Request("POST", SecurityAnalyticsPlugin.MAPPER_BASE_URI);
// both req params and req body are supported
createMappingRequest.setJsonEntity(
"{\n" +
" \"index_name\": \"ocsf_ct\",\n" +
" \"rule_topic\": \"cloudtrail\",\n" +
" \"partial\": true,\n" +
" \"alias_mappings\": {\n" +
" \"properties\": {\n" +
" \"timestamp\": {\n" +
" \"path\": \"time\",\n" +
" \"type\": \"alias\"\n" +
" }\n" +
" }\n" +
" }\n" +
"}"
);

Response createMappingResponse = client().performRequest(createMappingRequest);

assertEquals(HttpStatus.SC_OK, createMappingResponse.getStatusLine().getStatusCode());
indexDoc(index, "0", randomCloudtrailOcsfDoc());

String rule = randomCloudtrailAggrRuleWithDotFields();

Response createResponse = makeRequest(client(), "POST", SecurityAnalyticsPlugin.RULE_BASE_URI, Collections.singletonMap("category", "cloudtrail"),
new StringEntity(rule), new BasicHeader("Content-Type", "application/json"));
Assert.assertEquals("Create rule failed", RestStatus.CREATED, restStatus(createResponse));
Map<String, Object> responseBody = asMap(createResponse);
String createdId = responseBody.get("_id").toString();

DetectorInput input = new DetectorInput("cloudtrail detector for security analytics", List.of("ocsf_ct"), List.of(new DetectorRule(createdId)),
List.of());
Detector detector = randomDetectorWithInputsAndTriggers(List.of(input),
List.of(new DetectorTrigger(null, "test-trigger", "1", List.of(), List.of(createdId), List.of(), List.of(), List.of(), List.of())));

createResponse = makeRequest(client(), "POST", SecurityAnalyticsPlugin.DETECTOR_BASE_URI, Collections.emptyMap(), toHttpEntity(detector));
Assert.assertEquals("Create detector failed", RestStatus.CREATED, restStatus(createResponse));

responseBody = asMap(createResponse);

createdId = responseBody.get("_id").toString();
int createdVersion = Integer.parseInt(responseBody.get("_version").toString());
Assert.assertNotEquals("response is missing Id", Detector.NO_ID, createdId);
Assert.assertTrue("incorrect version", createdVersion > 0);
Assert.assertEquals("Incorrect Location header", String.format(Locale.getDefault(), "%s/%s", SecurityAnalyticsPlugin.DETECTOR_BASE_URI, createdId), createResponse.getHeader("Location"));
Assert.assertFalse(((Map<String, Object>) responseBody.get("detector")).containsKey("rule_topic_index"));
Assert.assertFalse(((Map<String, Object>) responseBody.get("detector")).containsKey("findings_index"));
Assert.assertFalse(((Map<String, Object>) responseBody.get("detector")).containsKey("alert_index"));

String detectorTypeInResponse = (String) ((Map<String, Object>)responseBody.get("detector")).get("detector_type");
Assert.assertEquals("Detector type incorrect", randomDetectorType().toLowerCase(Locale.ROOT), detectorTypeInResponse);

String request = "{\n" +
" \"query\" : {\n" +
" \"match\":{\n" +
" \"_id\": \"" + createdId + "\"\n" +
" }\n" +
" }\n" +
"}";
List<SearchHit> hits = executeSearch(Detector.DETECTORS_INDEX, request);
SearchHit hit = hits.get(0);

String workflowId = ((List<String>) ((Map<String, Object>) hit.getSourceAsMap().get("detector")).get("workflow_ids")).get(0);

indexDoc("ocsf_ct", "1", randomCloudtrailOcsfDoc());
indexDoc("ocsf_ct", "2", randomCloudtrailOcsfDoc());
executeAlertingWorkflow(workflowId, Collections.emptyMap());

Map<String, String> params = new HashMap<>();
params.put("detector_id", createdId);
Response getFindingsResponse = makeRequest(client(), "GET", SecurityAnalyticsPlugin.FINDINGS_BASE_URI + "/_search", params, null);
Map<String, Object> getFindingsBody = entityAsMap(getFindingsResponse);

// Assert findings
assertNotNull(getFindingsBody);
assertEquals(1, getFindingsBody.get("total_findings"));

doRollover("ocsf_ct");
Thread.sleep(90000);

indexDoc("ocsf_ct", "4", randomCloudtrailOcsfDoc());
indexDoc("ocsf_ct", "5", randomCloudtrailOcsfDoc());
executeAlertingWorkflow(workflowId, Collections.emptyMap());

params = new HashMap<>();
params.put("detector_id", createdId);
getFindingsResponse = makeRequest(client(), "GET", SecurityAnalyticsPlugin.FINDINGS_BASE_URI + "/_search", params, null);
getFindingsBody = entityAsMap(getFindingsResponse);

// Assert findings
assertNotNull(getFindingsBody);
assertEquals(2, getFindingsBody.get("total_findings"));
}

private static void assertRuleMonitorFinding(Map<String, Object> executeResults, String ruleId, int expectedDocCount, List<String> expectedTriggerResult) {
List<Map<String, Object>> buckets = ((List<Map<String, Object>>) (((Map<String, Object>) ((Map<String, Object>) ((Map<String, Object>) ((List<Object>) ((Map<String, Object>) executeResults.get("input_results")).get("results")).get(0)).get("aggregations")).get("result_agg")).get("buckets")));
Integer docCount = buckets.stream().mapToInt(it -> (Integer) it.get("doc_count")).sum();
Expand Down
Loading