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]
description: |
'A User without access tried to Run an Instance. It might be to launch a malicious Instance in AWS subscription. Ref: https://stratus-red-team.cloud/attack-techniques/AWS/aws.execution.ec2-launch-unusual-instances/'
kind: Scheduled
tactics:
- ResourceDevelopment
requiredDataConnectors:
- connectorId: AWS
dataTypes:
- AWSCloudTrail
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_UnauthorizedInstanceSetUpAttempt.yaml
severity: Medium
name: Unauthorized EC2 Instance Setup Attempt
triggerThreshold: 0
queryPeriod: 10m
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]
relevantTechniques:
- T1583
id: f7210a45-12a4-4d02-b59e-f23476827a4b
queryFrequency: 10m
status: Available
triggerOperator: gt
version: 1.0.0
entityMappings:
- entityType: Account
fieldMappings:
- columnName: Name
identifier: Name
- columnName: UpnSuffix
identifier: UPNSuffix
- entityType: IP
fieldMappings:
- columnName: SourceIpAddress
identifier: Address
