AWS CloudTrail SES List Identities

AnalysisType: rule
Filename: aws_cloudtrail_ses_list_identities.py
RuleID: "AWS.CloudTrail.SES.ListIdentities"
DisplayName: AWS CloudTrail SES List Identities
Enabled: true
LogTypes:
  - AWS.CloudTrail
Severity: Info
CreateAlert: false
Reference: >
  https://stratus-red-team.cloud/attack-techniques/AWS/aws.discovery.ses-enumerate/
Tags:
  - AWS CloudTrail
  - SES
Tests:
  - Name: ListIdentities Event
    ExpectedResult: true
    Log:
      {
        "p_event_time": "2025-01-20 16:52:14.000000000",
        "p_log_type": "AWS.CloudTrail",
        "p_parse_time": "2025-01-20 17:00:54.217385551",
        "additionalEventData": {
          "SignatureVersion": "4"
        },
        "awsRegion": "us-west-2",
        "eventCategory": "Management",
        "eventID": "7c41bbec-52c5-49cb-80aa-88f295d490fd",
        "eventName": "ListIdentities",
        "eventSource": "ses.amazonaws.com",
        "eventTime": "2025-01-20 16:52:14.000000000",
        "eventType": "AwsApiCall",
        "eventVersion": "1.08",
        "managementEvent": true,
        "readOnly": true,
        "recipientAccountId": "111122223333",
        "requestID": "7bdf32e1-6e53-4752-b745-2cb37788a23c",
        "sourceIPAddress": "1.2.3.4",
        "tlsDetails": {
          "cipherSuite": "TLS_AES_128_GCM_SHA256",
          "clientProvidedHostHeader": "email.us-west-2.amazonaws.com",
          "tlsVersion": "TLSv1.3"
        },
        "userAgent": "example-user-agent",
        "userIdentity": {
          "accessKeyId": "SAMPLE_ACCESS_KEY",
          "accountId": "111122223333",
          "arn": "arn:aws:sts::111122223333:assumed-role/SampleRole/bobson.dugnutt",
          "principalId": "SAMPLE_PRINCIPAL_ID:bobson.dugnutt",
          "sessionContext": {
            "attributes": {
              "creationDate": "2025-01-20T15:58:59Z",
              "mfaAuthenticated": "false"
            },
            "sessionIssuer": {
              "accountId": "111122223333",
              "arn": "arn:aws:iam::111122223333:role/aws-reserved/sso.amazonaws.com/us-west-2/SampleRole",
              "principalId": "SAMPLE_PRINCIPAL_ID",
              "type": "Role",
              "userName": "SampleRole"
            }
          },
          "type": "AssumedRole"
        }
      }

# ------ paired body: aws_cloudtrail_ses_list_identities.py ------

from panther_aws_helpers import aws_rule_context
from panther_core import PantherEvent


def rule(event: PantherEvent) -> bool:
    return event.get("eventName") == "ListIdentities"


def alert_context(event: PantherEvent) -> dict:
    context = aws_rule_context(event)
    context["accountRegion"] = f"{event.get('recipientAccountId')}_{event.get('eventRegion')}"
    return context