Name:AWS ECR Container Scanning Findings Low Informational Unknown id:cbc95e44-7c22-443f-88fd-0424478f5589 version:4 date:2024-09-30 author:Patrick Bareiss, Eric McGinnis Splunk status:production type:Anomaly Description:The following analytic identifies low, informational, or unknown severity findings from AWS Elastic Container Registry (ECR) image scans. It leverages AWS CloudTrail logs, specifically the DescribeImageScanFindings event, to detect these findings. This activity is significant for a SOC as it helps in early identification of potential vulnerabilities or misconfigurations in container images, which could be exploited if left unaddressed. If confirmed malicious, these findings could lead to unauthorized access, data breaches, or further exploitation within the containerized environment. Data_source:
-AWS CloudTrail DescribeImageScanFindings
search:`cloudtrail` eventSource=ecr.amazonaws.com eventName=DescribeImageScanFindings | spath path=responseElements.imageScanFindings.findings{} output=findings | mvexpand findings | spath input=findings| search severity IN ("LOW", "INFORMATIONAL", "UNKNOWN") | rename name as finding_name, description as finding_description, requestParameters.imageId.imageDigest as imageDigest, requestParameters.repositoryName as repository, userIdentity.principalId as user | eval finding = finding_name.", ".finding_description | eval phase="release" | eval severity="low" | stats min(_time) as firstTime max(_time) as lastTime by awsRegion, eventName, eventSource, imageDigest, repository, user, src_ip, finding, phase, severity | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `aws_ecr_container_scanning_findings_low_informational_unknown_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:unknown References: -https://docs.aws.amazon.com/AmazonECR/latest/userguide/image-scanning.html drilldown_searches: name:'View the detection results for - "$repository$"' search:'%original_detection_search% | search repository = "$repository$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$repository$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$repository$") starthoursago=168 | 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:'$info_min_time$' latest_offset:'$info_max_time$' tags: analytic_story: - 'Dev Sec Ops' asset_type:AWS Account confidence:50 impact:10 message:Vulnerabilities with severity $severity$ found in repository $repository$ mitre_attack_id: - 'T1204.003' - 'T1204' observable: name:'user' type:'User' - role: - 'Attacker' name:'repository' type:'Other' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - 'eventSource' - 'eventName' - 'responseElements.imageScanFindings.findings{}' - 'awsRegion' - 'requestParameters.imageId.imageDigest' - 'requestParameters.repositoryName' - 'user' - 'userName' - 'src_ip' risk_score:5 security_domain:network
