name: AWS CloudTrail ModifyDBInstance
id: bfa2912d-1a33-4b05-be46-543874d68241
version: 3
creation_date: '2024-05-22'
modification_date: '2026-05-13'
author: Patrick Bareiss, Splunk
description: Logs an event when a modification is made to an AWS database instance, such as parameters or configurations.
mitre_components:
    - Instance Modification
    - Cloud Service Modification
    - Instance Metadata
source: aws_cloudtrail
sourcetype: aws:cloudtrail
separator: eventName
separator_value: ModifyDBInstance
supported_TA:
    - name: Splunk Add-on for AWS
      url: https://splunkbase.splunk.com/app/1876
      version: 8.1.2
fields:
    - _time
    - 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
    - host
    - index
    - linecount
    - managementEvent
    - msg
    - object_category
    - product
    - punct
    - readOnly
    - recipientAccountId
    - region
    - requestID
    - requestParameters.allowMajorVersionUpgrade
    - requestParameters.applyImmediately
    - requestParameters.dBInstanceIdentifier
    - requestParameters.deletionProtection
    - requestParameters.masterUserPassword
    - responseElements.allocatedStorage
    - responseElements.autoMinorVersionUpgrade
    - responseElements.availabilityZone
    - responseElements.backupRetentionPeriod
    - responseElements.backupTarget
    - responseElements.cACertificateIdentifier
    - responseElements.copyTagsToSnapshot
    - responseElements.customerOwnedIpEnabled
    - responseElements.dBInstanceArn
    - responseElements.dBInstanceClass
    - responseElements.dBInstanceIdentifier
    - responseElements.dBInstanceStatus
    - responseElements.dBParameterGroups{}.dBParameterGroupName
    - responseElements.dBParameterGroups{}.parameterApplyStatus
    - responseElements.dBSubnetGroup.dBSubnetGroupDescription
    - responseElements.dBSubnetGroup.dBSubnetGroupName
    - responseElements.dBSubnetGroup.subnetGroupStatus
    - responseElements.dBSubnetGroup.subnets{}.subnetAvailabilityZone.name
    - responseElements.dBSubnetGroup.subnets{}.subnetIdentifier
    - responseElements.dBSubnetGroup.subnets{}.subnetStatus
    - responseElements.dBSubnetGroup.vpcId
    - responseElements.dbInstancePort
    - responseElements.dbiResourceId
    - responseElements.deletionProtection
    - responseElements.endpoint.address
    - responseElements.endpoint.hostedZoneId
    - responseElements.endpoint.port
    - responseElements.engine
    - responseElements.engineVersion
    - responseElements.enhancedMonitoringResourceArn
    - responseElements.httpEndpointEnabled
    - responseElements.iAMDatabaseAuthenticationEnabled
    - responseElements.instanceCreateTime
    - responseElements.kmsKeyId
    - responseElements.latestRestorableTime
    - responseElements.licenseModel
    - responseElements.masterUsername
    - responseElements.monitoringInterval
    - responseElements.monitoringRoleArn
    - responseElements.multiAZ
    - responseElements.networkType
    - responseElements.optionGroupMemberships{}.optionGroupName
    - responseElements.optionGroupMemberships{}.status
    - responseElements.pendingModifiedValues.masterUserPassword
    - responseElements.performanceInsightsEnabled
    - responseElements.performanceInsightsKMSKeyId
    - responseElements.performanceInsightsRetentionPeriod
    - responseElements.preferredBackupWindow
    - responseElements.preferredMaintenanceWindow
    - responseElements.publiclyAccessible
    - responseElements.storageEncrypted
    - responseElements.storageThroughput
    - responseElements.storageType
    - responseElements.vpcSecurityGroups{}.status
    - responseElements.vpcSecurityGroups{}.vpcSecurityGroupId
    - sessionCredentialFromConsole
    - signature
    - source
    - sourceIPAddress
    - sourcetype
    - splunk_server
    - src
    - src_ip
    - start_time
    - timeendpos
    - timestartpos
    - 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
output_fields:
    - dest
    - user
    - user_agent
    - src
    - vendor_account
    - vendor_region
    - vendor_product
example_log: '{"eventVersion": "1.08", "userIdentity": {"type": "AssumedRole", "principalId": "AROAYTOGP2RLDF6WP4HD6:gowthamarajr@splunk.com", "arn": "arn:aws:sts::111111111111:assumed-role/AWSReservedSSO_SPLKAdministratorAccess_d9ce1347d0a6dd3f/gowthamarajr@splunk.com", "accountId": "111111111111", "accessKeyId": "ASIAYTOGP2RLAKJDBQGB", "sessionContext": {"sessionIssuer": {"type": "Role", "principalId": "AROAYTOGP2RLDF6WP4HD6", "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": "2022-08-05T08:47:55Z", "mfaAuthenticated": "false"}}}, "eventTime": "2022-08-05T09:19:15Z", "eventSource": "rds.amazonaws.com", "eventName": "ModifyDBInstance", "awsRegion": "us-west-2", "sourceIPAddress": "AWS Internal", "userAgent": "AWS Internal", "requestParameters": {"dBInstanceIdentifier": "database-1", "applyImmediately": true, "masterUserPassword": "****", "allowMajorVersionUpgrade": false, "deletionProtection": true}, "responseElements": {"dBInstanceIdentifier": "database-1", "dBInstanceClass": "db.m6g.large", "engine": "postgres", "dBInstanceStatus": "available", "masterUsername": "postgres", "endpoint": {"address": "database-1.ce6wk5bvtc0t.us-west-2.rds.amazonaws.com", "port": 5432, "hostedZoneId": "Z1PVIF0B656C1W"}, "allocatedStorage": 5, "instanceCreateTime": "Aug 5, 2022 9:02:51 AM", "preferredBackupWindow": "06:35-07:05", "backupRetentionPeriod": 7, "dBSecurityGroups": [], "vpcSecurityGroups": [{"vpcSecurityGroupId": "sg-46cfd020", "status": "active"}], "dBParameterGroups": [{"dBParameterGroupName": "default.postgres14", "parameterApplyStatus": "in-sync"}], "availabilityZone": "us-west-2a", "dBSubnetGroup": {"dBSubnetGroupName": "default", "dBSubnetGroupDescription": "default", "vpcId": "vpc-5f02343b", "subnetGroupStatus": "Complete", "subnets": [{"subnetIdentifier": "subnet-43225f35", "subnetAvailabilityZone": {"name": "us-west-2b"}, "subnetOutpost": {}, "subnetStatus": "Active"}, {"subnetIdentifier": "subnet-e55d7881", "subnetAvailabilityZone": {"name": "us-west-2a"}, "subnetOutpost": {}, "subnetStatus": "Active"}, {"subnetIdentifier": "subnet-0beddb972f034bdaa", "subnetAvailabilityZone": {"name": "us-west-2c"}, "subnetOutpost": {}, "subnetStatus": "Active"}, {"subnetIdentifier": "subnet-2d70cd75", "subnetAvailabilityZone": {"name": "us-west-2c"}, "subnetOutpost": {}, "subnetStatus": "Active"}]}, "preferredMaintenanceWindow": "sat:11:44-sat:12:14", "pendingModifiedValues": {"masterUserPassword": "****"}, "latestRestorableTime": "Aug 5, 2022 9:12:31 AM", "multiAZ": false, "engineVersion": "14.2", "autoMinorVersionUpgrade": true, "readReplicaDBInstanceIdentifiers": [], "licenseModel": "postgresql-license", "storageThroughput": 0, "optionGroupMemberships": [{"optionGroupName": "default:postgres-14", "status": "in-sync"}], "publiclyAccessible": false, "storageType": "standard", "dbInstancePort": 0, "storageEncrypted": true, "kmsKeyId": "arn:aws:kms:us-west-2:111111111111:key/318bcd5d-c453-489d-b63a-07753eab0623", "dbiResourceId": "db-IX2K4LYFLBVZDHBYNPEAVFHFQM", "cACertificateIdentifier": "rds-ca-2019", "domainMemberships": [], "copyTagsToSnapshot": true, "monitoringInterval": 60, "enhancedMonitoringResourceArn": "arn:aws:logs:us-west-2:111111111111:log-group:RDSOSMetrics:log-stream:db-IX2K4LYFLBVZDHBYNPEAVFHFQM", "monitoringRoleArn": "arn:aws:iam::111111111111:role/rds-monitoring-role", "dBInstanceArn": "arn:aws:rds:us-west-2:111111111111:db:database-1", "iAMDatabaseAuthenticationEnabled": false, "performanceInsightsEnabled": true, "performanceInsightsKMSKeyId": "arn:aws:kms:us-west-2:111111111111:key/318bcd5d-c453-489d-b63a-07753eab0623", "performanceInsightsRetentionPeriod": 7, "deletionProtection": true, "associatedRoles": [], "httpEndpointEnabled": false, "tagList": [], "customerOwnedIpEnabled": false, "networkType": "IPV4", "backupTarget": "region"}, "requestID": "59e6b621-2f12-415b-bde4-21fa2dc7c113", "eventID": "46351ca1-760e-4eef-b3ff-19723e13fbf8", "readOnly": false, "eventType": "AwsApiCall", "managementEvent": true, "recipientAccountId": "111111111111", "eventCategory": "Management", "sessionCredentialFromConsole": "true"}'