AWSCloudTrail
| where EventName == "RunInstances"
| where ErrorCode == "Client.UnauthorizedOperation"
| project TimeGenerated, AwsEventId, EventTypeName, UserIdentityPrincipalid, UserIdentityType, UserIdentityAccountId, SessionMfaAuthenticated, SessionCreationDate, SessionIssuerUserName, SourceIpAddress, AWSRegion, UserAgent, RequestParameters, ErrorMessage
| extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
| extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_UnauthorizedInstanceSetUpAttempt.yaml
customDetails:
AWSRegion: AWSRegion
ErrorMessage: ErrorMessage
UserAgent: UserAgent
UserIdentityType: UserIdentityType
relevantTechniques:
- T1583
triggerThreshold: 0
entityMappings:
- entityType: Account
fieldMappings:
- identifier: Name
columnName: Name
- identifier: UPNSuffix
columnName: UpnSuffix
- entityType: IP
fieldMappings:
- identifier: Address
columnName: SourceIpAddress
tactics:
- ResourceDevelopment
query: |
AWSCloudTrail
| where EventName == "RunInstances"
| where ErrorCode == "Client.UnauthorizedOperation"
| project TimeGenerated, AwsEventId, EventTypeName, UserIdentityPrincipalid, UserIdentityType, UserIdentityAccountId, SessionMfaAuthenticated, SessionCreationDate, SessionIssuerUserName, SourceIpAddress, AWSRegion, UserAgent, RequestParameters, ErrorMessage
| extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
| extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]
triggerOperator: gt
id: f7210a45-12a4-4d02-b59e-f23476827a4b
kind: Scheduled
queryFrequency: 10m
version: 1.0.1
requiredDataConnectors:
- connectorId: AWS
dataTypes:
- AWSCloudTrail
alertDetailsOverride:
alertDisplayNameFormat: Unauthorized EC2 instance launch attempt by {{UserIdentityPrincipalid}} in {{AWSRegion}}
alertDescriptionFormat: User {{UserIdentityPrincipalid}} (type {{UserIdentityType}}) attempted an unauthorized EC2 instance launch in region {{AWSRegion}}.
description: |
Detects an unauthorized attempt to launch an EC2 instance by a user without the necessary permissions. This may indicate an attempt to provision malicious infrastructure within the AWS subscription. Reference: https://stratus-red-team.cloud/attack-techniques/AWS/aws.execution.ec2-launch-unusual-instances/
status: Available
name: AWSCloudTrail - Unauthorized EC2 Instance Setup Attempt
severity: Medium
queryPeriod: 10m
