aws_cloudtrail_putbucketreplication.yml

name: AWS CloudTrail PutBucketReplication
id: 0e1362eb-e592-419f-8fa5-556d3a122417
version: 2
date: '2025-01-23'
author: Patrick Bareiss, Splunk
description: Logs an event when replication configurations are added or modified for
  an S3 bucket.
mitre_components:
- Cloud Storage Modification
source: aws_cloudtrail
sourcetype: aws:cloudtrail
separator: eventName
separator_value: PutBucketReplication
supported_TA:
- name: Splunk Add-on for AWS
  url: https://splunkbase.splunk.com/app/1876
  version: 7.9.1
fields:
- _time
- additionalEventData.AuthenticationMethod
- additionalEventData.CipherSuite
- additionalEventData.SignatureVersion
- additionalEventData.bytesTransferredIn
- additionalEventData.bytesTransferredOut
- additionalEventData.x-amz-id-2
- app
- awsRegion
- aws_account_id
- command
- date_hour
- date_mday
- date_minute
- date_month
- date_second
- date_wday
- date_year
- date_zone
- dest
- dvc
- errorCode
- eventCategory
- eventID
- eventName
- eventSource
- eventTime
- eventType
- eventVersion
- eventtype
- host
- index
- linecount
- managementEvent
- msg
- object
- object_category
- object_id
- product
- punct
- readOnly
- recipientAccountId
- region
- requestID
- requestParameters.Host
- requestParameters.ReplicationConfiguration.Role
- requestParameters.ReplicationConfiguration.Rule.DeleteMarkerReplication.Status
- requestParameters.ReplicationConfiguration.Rule.Destination.Bucket
- requestParameters.ReplicationConfiguration.Rule.Filter
- requestParameters.ReplicationConfiguration.Rule.ID
- requestParameters.ReplicationConfiguration.Rule.Priority
- requestParameters.ReplicationConfiguration.Rule.Status
- requestParameters.ReplicationConfiguration.xmlns
- requestParameters.bucketName
- requestParameters.replication
- resources{}.ARN
- resources{}.accountId
- resources{}.type
- responseElements
- signature
- source
- sourceIPAddress
- sourcetype
- splunk_server
- src
- src_ip
- start_time
- tag
- tag::eventtype
- timeendpos
- timestartpos
- tlsDetails.cipherSuite
- tlsDetails.clientProvidedHostHeader
- tlsDetails.tlsVersion
- user
- userAgent
- userIdentity.accessKeyId
- userIdentity.accountId
- userIdentity.arn
- userIdentity.principalId
- userIdentity.sessionContext.attributes.creationDate
- userIdentity.sessionContext.attributes.mfaAuthenticated
- userIdentity.sessionContext.sessionIssuer.accountId
- userIdentity.sessionContext.sessionIssuer.arn
- userIdentity.sessionContext.sessionIssuer.principalId
- userIdentity.sessionContext.sessionIssuer.type
- userIdentity.sessionContext.sessionIssuer.userName
- userIdentity.type
- userName
- user_access_key
- user_agent
- user_arn
- user_group_id
- user_id
- user_name
- user_type
- vendor
- vendor_account
- vendor_product
- vendor_region
- vpcEndpointId
example_log: '{"eventVersion": "1.08", "userIdentity": {"type": "AssumedRole", "principalId":
  "AROAYTOGP2RLDF6WP4H11:bpatel@splunk.com", "arn": "arn:aws:sts::111111111111:assumed-role/AWSReservedSSO_SPLKAdministratorAccess_d9ce1347d0a6dd3f/bpatel@splunk.com",
  "accountId": "111111111111", "accessKeyId": "ASIAYTOGP2RLJOVYQHW2", "sessionContext":
  {"sessionIssuer": {"type": "Role", "principalId": "AROAYTOGP2RLDF6WP4H11", "arn":
  "arn:aws:iam::111111111111:role/aws-reserved/sso.amazonaws.com/us-west-2/AWSReservedSSO_SPLKAdministratorAccess_d9ce1347d0a6dd3f",
  "accountId": "111111111111", "userName": "AWSReservedSSO_SPLKAdministratorAccess_d9ce1347d0a6dd3f"},
  "webIdFederationData": {}, "attributes": {"creationDate": "2023-04-24T23:45:42Z",
  "mfaAuthenticated": "false"}}}, "eventTime": "2023-04-24T23:49:33Z", "eventSource":
  "s3.amazonaws.com", "eventName": "PutBucketReplication", "awsRegion": "us-west-2",
  "sourceIPAddress": "23.93.193.6", "userAgent": "[S3Console/0.4, aws-internal/3 aws-sdk-java/1.11.1030
  Linux/5.4.238-155.347.amzn2int.x86_64 OpenJDK_64-Bit_Server_VM/25.362-b10 java/1.8.0_362
  vendor/Oracle_Corporation cfg/retry-mode/standard]", "requestParameters": {"replication":
  "", "bucketName": "git-wild-hunt-results", "Host": "s3.us-west-2.amazonaws.com",
  "ReplicationConfiguration": {"Role": "arn:aws:iam::111111111111:role/attack_range_bpatel",
  "xmlns": "http://s3.amazonaws.com/doc/2006-03-01/", "Rule": {"Status": "Enabled",
  "Destination": {"Bucket": "arn:aws:s3:::badpublicbuckettest"}, "Filter": "", "Priority":
  0, "ID": "replication_x_test", "DeleteMarkerReplication": {"Status": "Disabled"}}}},
  "responseElements": null, "additionalEventData": {"SignatureVersion": "SigV4", "CipherSuite":
  "ECDHE-RSA-AES128-GCM-SHA256", "bytesTransferredIn": 416, "AuthenticationMethod":
  "AuthHeader", "x-amz-id-2": "8UoliFe/sG2/v8qB2g763/g0Fy+kfaUqtKrzLHEILnHUisC3rL1dQfJ3NSIYcA/kzpIHQ955pGo=",
  "bytesTransferredOut": 0}, "requestID": "14SAVMJNEJMTZN91", "eventID": "fbe079d1-bc6b-4ee0-8893-d2b412c5550f",
  "readOnly": false, "resources": [{"accountId": "111111111111", "type": "AWS::S3::Bucket",
  "ARN": "arn:aws:s3:::git-wild-hunt-results"}], "eventType": "AwsApiCall", "managementEvent":
  true, "recipientAccountId": "111111111111", "vpcEndpointId": "vpce-a0d039c9", "eventCategory":
  "Management", "tlsDetails": {"tlsVersion": "TLSv1.2", "cipherSuite": "ECDHE-RSA-AES128-GCM-SHA256",
  "clientProvidedHostHeader": "s3.us-west-2.amazonaws.com"}}'
output_fields:
- dest
- user
- user_agent
- src
- vendor_account
- vendor_region
- vendor_product