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Amazon Web Services

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high advisory

AWS AssumeRoleWithWebIdentity from Kubernetes SA and External ASN

Detects successful AWS AssumeRoleWithWebIdentity where the caller identity is a Kubernetes service account and the source autonomous system organization is not Amazon.com, Inc., potentially indicating a stolen or misused service-account token being used off-cluster.

Amazon Web Services aws cloudtrail iam eks irsa initial-access
2r 1t
medium advisory

AWS EC2 Role GetCallerIdentity from New Source AS Organization

The rule detects when an EC2 instance role session calls AWS STS GetCallerIdentity from a new source autonomous system (AS) organization name, indicating potential credential theft and verification from outside expected egress paths.

Amazon Web Services cloud aws getcalleridentity ec2 discovery
2r 1t
medium advisory

AWS Discovery API Calls from VPN ASN by New Identity

This rule detects the initial use of AWS discovery APIs from VPN-associated ASNs by a previously unseen identity, indicating potential reconnaissance activity.

Amazon Web Services cloud aws discovery vpn
2r 1t
medium advisory

AWS IAM Customer Managed Policy Version Manipulation for Privilege Escalation

Successful creation of new or setting default versions of customer-managed IAM policies can indicate privilege escalation attempts by attackers modifying policy permissions.

Amazon Web Services privilege-escalation aws iam
2r 2t
medium advisory

AWS Network Access Control List Deletion Detected

Detection of AWS Network Access Control List (ACL) deletion using AWS CloudTrail logs, which can remove critical access restrictions, potentially allowing unauthorized access to cloud instances and leading to data exfiltration or further compromise.

Splunk Enterprise +3 cloud aws network
2r 1t