Browse Rules

AWS CloudTrail SES Enumeration

AWS Config Service Created

An AWS Config Recorder or Delivery Channel was created

Monitor Unauthorized API Calls

An unauthorized AWS API call was made

AWS EC2 Discovery Commands Executed

Multiple different discovery commands were executed by the same EC2 instance. This could indicate a compromised instance.

Detect Reconnaissance from IAM Users

An IAM user has a high volume of access denied API calls.

AWS CloudTrail Log Encryption

This policy validates that CloudTrail Logs are encrypted at rest with customer managed KMS key.

A CloudTrail Was Created or Updated

A CloudTrail Trail was created, updated, or enabled.

AWS Account Discovery [snowflake-awscloudtrail]

Adversaries may attempt to get a listing of cloud accounts. Cloud accounts are those created and configured by an organization for use by users, remote support, services, or for administration of resources within a cloud service provider or SaaS application. -- Threat Actor Association: GUI-vil

AWS Account Discovery [splunk-awscloudtrail]

Adversaries may attempt to get a listing of cloud accounts. Cloud accounts are those created and configured by an organization for use by users, remote support, services, or for administration of resources within a cloud service provider or SaaS application. -- Threat Actor Association: GUI-vil

AWS Service Quotas Multi-Region GetServiceQuota Requests

Identifies when a single AWS principal makes GetServiceQuota API calls for the EC2 service quota L-1216C47A, across more than 10 AWS regions within a 30-second window. This quota represents the vCPU limit for on-demand EC2 instances. Adversaries commonly enumerate this quota across regions to assess capacity for large-scale instance deployment, including cryptocurrency mining, malware hosting, or command-and-control infrastructure. This behavior may indicate cloud infrastructure discovery using

Sensitive API Calls Via VPC Endpoint

Detects sensitive or unusual API calls that might indicate lateral movement, reconnaissance, or other malicious activities through VPC Endpoints. Only available for CloudTrail, EC2, KMS, S3, and Secrets Manager services.

GKE Suspicious Self-Subject Review via Service Account

Detects GKE service account or node identities invoking self-subject access or rules review APIs. Non-human identities rarely enumerate their own permissions outside known controllers; this can indicate stolen tokens probing effective RBAC.

AWS Account Discovery By Rare User

Identifies the first time, within a lookback window, an identity performs AWS Organizations or IAM account enumeration APIs. Attackers with compromised credentials often map the organization (accounts, OUs, roots, delegated admins) and account-level metadata (aliases, summary) using the AWS CLI or SDKs. This is a New Terms rule detecting a rare occurrence of the `cloud.account.id` and `user.name` pair for these actions.

AWS Discovery API Calls from VPN ASN for the First Time by Identity

Flags the first time a given IAM principal invokes a narrow set of high-signal discovery APIs (credential check, account and IAM enumeration, bucket and compute inventory, logging introspection) from a source IP whose autonomous system number (ASN) matches a curated set commonly associated with consumer VPN brands, VPN-heavy hosting, and provider networks referenced in public reporting on TeamPCP activity (for example 31173 Services AB AS39351 and Oy Crea Nova Hosting Solution Ltd). Broad `List*

Suspicious Instance Metadata Service (IMDS) API Request

This rule identifies various tools/scripts performing network activities attempting to access the cloud service provider's instance metadata service (IMDS) API endpoint, which can be used to retrieve sensitive instance-specific information such as instance ID, public IP address, and even temporary security credentials if roles are assumed by that instance.

Rare AWS Error Code

A machine learning job detected an unusual error in a CloudTrail message. These can be byproducts of attempted or successful persistence, privilege escalation, defense evasion, discovery, lateral movement, or collection.

Azure AKS Suspicious Self-Subject Review by Service Account or Node Identity

Detects AKS (Azure Kubernetes Service) service account or node identities invoking self-subject access or rules review APIs. Non-human identities rarely enumerate their own permissions outside known controllers; this can indicate stolen tokens probing effective RBAC before privilege escalation.

Spike in AWS Error Messages

A machine learning job detected a significant spike in the rate of a particular error in the CloudTrail messages. Spikes in error messages may accompany attempts at privilege escalation, lateral movement, or discovery.

External Principal Accessing AWS Resources Via VPC Endpoint

This rule detects when a principal from one AWS account accesses resources in a different AWS account using a VPC Endpoint. While cross-account access may be expected in some cases, it could also indicate unauthorized lateral movement between AWS accounts.

AWS Connections Discovery [snowflake-awscloudtrail]

Adversaries may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network. An adversary who gains access to a system that is part of a cloud-based environment may map out Virtual Private Clouds or Virtual Networks in order to determine what systems and services are connected -- Threat Actor Association: GUI-vil

AWS Connections Discovery [splunk-awscloudtrail]

Adversaries may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network. An adversary who gains access to a system that is part of a cloud-based environment may map out Virtual Private Clouds or Virtual Networks in order to determine what systems and services are connected -- Threat Actor Association: GUI-vil

AWS EC2 User Data Retrieval for EC2 Instance

Identifies discovery request DescribeInstanceAttribute with the attribute userData and instanceId in AWS CloudTrail logs. This may indicate an attempt to retrieve user data from an EC2 instance. Adversaries may use this information to gather sensitive data from the instance such as hardcoded credentials or to identify potential vulnerabilities. This is a New Terms rule that identifies the first time an IAM user or role requests the user data for a specific EC2 instance.

GCP Secret Manager ListSecrets Across Multiple Projects

Detects a single identity listing Google Cloud Secret Manager secrets across many distinct projects in a short window. ListSecrets does not return secret values, but sweeping many projects is a common reconnaissance step before targeted AccessSecretVersion calls. Legitimate workloads typically list secrets within one project or a small set of projects; cross-project bursts from one user and source IP are uncommon outside security tooling or compromise.

AWS S3 Bucket Enumeration or Brute Force

Identifies a high number of failed S3 operations against a single bucket from a single source address within a short timeframe. This activity can indicate attempts to collect bucket objects or cause an increase in billing to an account via internal "AccessDenied" errors.

AWS Lateral Movement from Kubernetes SA via AssumeRoleWithWebIdentity

Detects when credentials issued through `AssumeRoleWithWebIdentity` for a Kubernetes service account identity are later used for several distinct AWS control-plane actions on the same session access key. Workloads that use EKS IAM Roles for Service Accounts routinely exchange a projected service-account token for short-lived IAM credentials; this rule highlights sessions where that exchange is followed by a spread of sensitive APIs—reconnaissance, secrets and parameter access, IAM changes, or co