AWS SAML Update identity provider

Name:AWS SAML Update identity provider
id:2f0604c6-6030-11eb-ae93-0242ac130002
version:12
date:None
author:Rod Soto, Splunk
status:production
type:TTP
Description:The following analytic detects updates to the SAML provider in AWS. It leverages AWS CloudTrail logs to identify the `UpdateSAMLProvider` event, analyzing fields such as `sAMLProviderArn`, `sourceIPAddress`, and `userIdentity` details. Monitoring updates to the SAML provider is crucial as it may indicate a perimeter compromise of federated credentials or unauthorized backdoor access set by an attacker. If confirmed malicious, this activity could allow attackers to manipulate identity federation, potentially leading to unauthorized access to cloud resources and sensitive data.
Data_source:

• -AWS CloudTrail UpdateSAMLProvider

search:`cloudtrail` eventName=UpdateSAMLProvider

| rename user_name as user

| stats count min(_time) as firstTime max(_time) as lastTime values(requestParameters.sAMLProviderArn) as request_parameters
BY signature dest user
user_agent src vendor_account
vendor_region vendor_product

| `security_content_ctime(firstTime)`

| `security_content_ctime(lastTime)`

| `aws_saml_update_identity_provider_filter`

how_to_implement:You must install splunk AWS add on and Splunk App for AWS. This search works with AWS CloudTrail logs.
known_false_positives:Updating a SAML provider or creating a new one may not necessarily be malicious however it needs to be closely monitored.
References:
  -https://www.cisa.gov/uscert/ncas/alerts/aa21-008a
  -https://www.splunk.com/en_us/blog/security/a-golden-saml-journey-solarwinds-continued.html
  -https://www.fireeye.com/content/dam/fireeye-www/blog/pdfs/wp-m-unc2452-2021-000343-01.pdf
  -https://www.cyberark.com/resources/threat-research-blog/golden-saml-newly-discovered-attack-technique-forges-authentication-to-cloud-apps
drilldown_searches:
 name:'View the detection results for - "$user$"'
 search:'%original_detection_search% | search user = "$user$"'
 earliest_offset:'$info_min_time$'
 latest_offset:'$info_max_time$'
 name:'View risk events for the last 7 days for - "$user$"'
 search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$") | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
 earliest_offset:'7d'
 latest_offset:'0'
analytic_story:['Cloud Federated Credential Abuse']

asset_type:AWS Federated Account

mitre_attack_id:['T1078']

product:['Splunk Enterprise', 'Splunk Enterprise Security', 'Splunk Cloud']

category:cloud

security_domain:threat

tags:

tests:
 name:'True Positive Test'
 attack_data:
  data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1078/update_saml_provider/update_saml_provider.json
  sourcetype: aws:cloudtrail
  source: aws_cloudtrail
 test_type:'unit'
manual_test:None