Amazon EC2 example two - AWS Key Management Service

Amazon EC2 example two

In the following example, an IAM user running an Amazon EC2 instance creates and mounts a data volume that is encrypted under an AWS KMS (). This action generates multiple CloudTrail log records.

When the volume is created, Amazon EC2, acting on behalf of the customer, gets an encrypted data key from AWS KMS (GenerateDataKeyWithoutPlaintext). Then it creates a grant (CreateGrant) that allows it to decrypt the data key. When the volume is mounted, Amazon EC2 calls AWS KMS to decrypt the data key (Decrypt).

The instanceId of the Amazon EC2 instance, "i-81e2f56c", appears in the RunInstances event. The same instance ID qualifies the granteePrincipal of the grant that is created ("123456789012:aws:ec2-infrastructure:i-81e2f56c") and the assumed role that is the principal in the Decrypt call ("arn:aws:sts::123456789012:assumed-role/aws:ec2-infrastructure/i-81e2f56c").

The key ARN of the that protects the data volume, arn:aws:kms:us-east-1:123456789012:key/e29ddfd4-1bf6-4e1b-8ecb-08216bd70d07, appears in all three AWS KMS calls (CreateGrant, GenerateDataKeyWithoutPlaintext, and Decrypt).

{ "Records": [ { "eventVersion": "1.02", "userIdentity": { "type": "IAMUser", "principalId": "EX_PRINCIPAL_ID", "arn": "arn:aws:iam::123456789012:user/Alice", "accountId": "123456789012", "accessKeyId": "EXAMPLE_KEY_ID", "userName": "Alice", "sessionContext": { "attributes": { "mfaAuthenticated": "false", "creationDate": "2014-11-05T21:34:36Z" } }, "invokedBy": "signin.amazonaws.com" }, "eventTime": "2014-11-05T21:35:27Z", "eventSource": "ec2.amazonaws.com", "eventName": "RunInstances", "awsRegion": "us-east-1", "sourceIPAddress": "72.72.72.72", "userAgent": "signin.amazonaws.com", "requestParameters": { "instancesSet": { "items": [ { "imageId": "ami-b66ed3de", "minCount": 1, "maxCount": 1 } ] }, "groupSet": { "items": [ { "groupId": "sg-98b6e0f2" } ] }, "instanceType": "m3.medium", "blockDeviceMapping": { "items": [ { "deviceName": "/dev/xvda", "ebs": { "volumeSize": 8, "deleteOnTermination": true, "volumeType": "gp2" } }, { "deviceName": "/dev/sdb", "ebs": { "volumeSize": 8, "deleteOnTermination": false, "volumeType": "gp2", "encrypted": true } } ] }, "monitoring": { "enabled": false }, "disableApiTermination": false, "instanceInitiatedShutdownBehavior": "stop", "clientToken": "XdKUT141516171819", "ebsOptimized": false }, "responseElements": { "reservationId": "r-5ebc9f74", "ownerId": "123456789012", "groupSet": { "items": [ { "groupId": "sg-98b6e0f2", "groupName": "launch-wizard-2" } ] }, "instancesSet": { "items": [ { "instanceId": "i-81e2f56c", "imageId": "ami-b66ed3de", "instanceState": { "code": 0, "name": "pending" }, "amiLaunchIndex": 0, "productCodes": { }, "instanceType": "m3.medium", "launchTime": 1415223328000, "placement": { "availabilityZone": "us-east-1a", "tenancy": "default" }, "monitoring": { "state": "disabled" }, "stateReason": { "code": "pending", "message": "pending" }, "architecture": "x86_64", "rootDeviceType": "ebs", "rootDeviceName": "/dev/xvda", "blockDeviceMapping": { }, "virtualizationType": "hvm", "hypervisor": "xen", "clientToken": "XdKUT1415223327917", "groupSet": { "items": [ { "groupId": "sg-98b6e0f2", "groupName": "launch-wizard-2" } ] }, "networkInterfaceSet": { }, "ebsOptimized": false } ] } }, "requestID": "41c4b4f7-8bce-4773-bf0e-5ae3bb5cbce2", "eventID": "cd75a605-2fee-4fda-b847-9c3d330ebaae", "eventType": "AwsApiCall", "recipientAccountId": "123456789012" }, { "eventVersion": "1.02", "userIdentity": { "type": "IAMUser", "principalId": "EX_PRINCIPAL_ID", "arn": "arn:aws:iam::123456789012:user/Alice", "accountId": "123456789012", "accessKeyId": "EXAMPLE_KEY_ID", "userName": "Alice", "sessionContext": { "attributes": { "mfaAuthenticated": "false", "creationDate": "2014-11-05T21:34:36Z" } }, "invokedBy": "AWS Internal" }, "eventTime": "2014-11-05T21:35:35Z", "eventSource": "kms.amazonaws.com", "eventName": "CreateGrant", "awsRegion": "us-east-1", "sourceIPAddress": "AWS Internal", "userAgent": "AWS Internal", "requestParameters": { "constraints": { "encryptionContextSubset": { "aws:ebs:id": "vol-f67bafb2" } }, "granteePrincipal": "123456789012:aws:ec2-infrastructure:i-81e2f56c", "keyId": "arn:aws:kms:us-east-1:123456789012:key/e29ddfd4-1bf6-4e1b-8ecb-08216bd70d07" }, "responseElements": { "grantId": "6caf442b4ff8a27511fb6de3e12cc5342f5382112adf75c1a91dbd221ec356fe" }, "requestID": "41c4b4f7-8bce-4773-bf0e-5ae3bb5cbce2", "eventID": "c1ad79e3-0d3f-402a-b119-d5c31d7c6a6c", "readOnly": false, "resources": [ { "ARN": "arn:aws:kms:us-east-1:123456789012:key/e29ddfd4-1bf6-4e1b-8ecb-08216bd70d07", "accountId": "123456789012" } ], "eventType": "AwsApiCall", "recipientAccountId": "123456789012" }, { "eventVersion": "1.02", "userIdentity": { "type": "IAMUser", "principalId": "EX_PRINCIPAL_ID", "arn": "arn:aws:iam::123456789012:user/Alice", "accountId": "123456789012", "accessKeyId": "EXAMPLE_KEY_ID", "userName": "Alice", "sessionContext": { "attributes": { "mfaAuthenticated": "false", "creationDate": "2014-11-05T21:34:36Z" } }, "invokedBy": "AWS Internal" }, "eventTime": "2014-11-05T21:35:32Z", "eventSource": "kms.amazonaws.com", "eventName": "GenerateDataKeyWithoutPlaintext", "awsRegion": "us-east-1", "sourceIPAddress": "AWS Internal", "userAgent": "AWS Internal", "requestParameters": { "encryptionContext": { "aws:ebs:id": "vol-f67bafb2" }, "numberOfBytes": 64, "keyId": "alias/aws/ebs" }, "responseElements": null, "requestID": "create-123456789012-758247346-1415223332", "eventID": "ac3cab10-ce93-4953-9d62-0b6e5cba651d", "readOnly": true, "resources": [ { "ARN": "arn:aws:kms:us-east-1:123456789012:key/e29ddfd4-1bf6-4e1b-8ecb-08216bd70d07", "accountId": "123456789012" } ], "eventType": "AwsApiCall", "recipientAccountId": "123456789012" }, { "eventVersion": "1.02", "userIdentity": { "type": "AssumedRole", "principalId": "123456789012:aws:ec2-infrastructure:i-81e2f56c", "arn": "arn:aws:sts::123456789012:assumed-role/aws:ec2-infrastructure/i-81e2f56c", "accountId": "123456789012", "accessKeyId": "", "sessionContext": { "attributes": { "mfaAuthenticated": "false", "creationDate": "2014-11-05T21:35:38Z" }, "sessionIssuer": { "type": "Role", "principalId": "123456789012:aws:ec2-infrastructure", "arn": "arn:aws:iam::123456789012:role/aws:ec2-infrastructure", "accountId": "123456789012", "userName": "aws:ec2-infrastructure" } } }, "eventTime": "2014-11-05T21:35:47Z", "eventSource": "kms.amazonaws.com", "eventName": "Decrypt", "awsRegion": "us-east-1", "sourceIPAddress": "172.172.172.172", "requestParameters": { "encryptionContext": { "aws:ebs:id": "vol-f67bafb2" } }, "responseElements": null, "requestID": "b4b27883-6533-11e4-b4d9-751f1761e9e5", "eventID": "edb65380-0a3e-4123-bbc8-3d1b7cff49b0", "readOnly": true, "resources": [ { "ARN": "arn:aws:kms:us-east-1:123456789012:key/e29ddfd4-1bf6-4e1b-8ecb-08216bd70d07", "accountId": "123456789012" } ], "eventType": "AwsApiCall", "recipientAccountId": "123456789012" } ] }