Name:AWS Defense Evasion Delete Cloudtrail id:82092925-9ca1-4e06-98b8-85a2d3889552 version:12 date:None author:Bhavin Patel, Splunk status:production type:TTP Description:The following analytic detects the deletion of AWS CloudTrail logs by identifying `DeleteTrail` events within CloudTrail logs. This detection leverages CloudTrail data to monitor for successful `DeleteTrail` actions, excluding those initiated from the AWS console. This activity is significant because adversaries may delete CloudTrail logs to evade detection and operate stealthily within the compromised environment. If confirmed malicious, this action could allow attackers to cover their tracks, making it difficult to trace their activities and potentially leading to prolonged unauthorized access and further exploitation. Data_source:
| stats count min(_time) as firstTime max(_time) as lastTime BY signature dest user user_agent src vendor_account vendor_region vendor_product
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `aws_defense_evasion_delete_cloudtrail_filter`
how_to_implement:You must install Splunk AWS Add on and enable CloudTrail logs in your AWS Environment. known_false_positives:While this search has no known false positives, it is possible that an AWS admin has stopped cloudTrail logging. Please investigate this activity. References: -https://attack.mitre.org/techniques/T1562/008/ 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:['AWS Defense Evasion']
