Browse Rules

AWS S3 Bucket Replicated to Another Account

Identifies the creation or modification of an S3 bucket replication configuration that sends data to a bucket in a different AWS account. Cross-account replication can be used legitimately for backup, disaster recovery, and multi-account architectures, but adversaries with write access to an S3 bucket may abuse replication rules to silently exfiltrate large volumes of data to attacker-controlled accounts. This rule detects "PutBucketReplication" events where the configured destination account di

AWS S3 Bucket Server Access Logging Disabled

Identifies when server access logging is disabled for an Amazon S3 bucket. Server access logs provide a detailed record of requests made to an S3 bucket. When server access logging is disabled for a bucket, it could indicate an adversary's attempt to impair defenses by disabling logs that contain evidence of malicious activity.

AWS S3 Bucket Expiration Lifecycle Configuration Added

Identifies the addition of an expiration lifecycle configuration to an Amazon S3 bucket. S3 lifecycle rules can automatically delete or transition objects after a defined period. Adversaries can abuse them by configuring auto-deletion of logs, forensic evidence, or sensitive objects to cover their tracks. This rule detects the use of the PutBucketLifecycle or PutBucketLifecycleConfiguration APIs with Expiration parameters, which may indicate an attempt to automate the removal of data to hinder i

AWS S3 Bucket Policy Added to Share with External Account

Detects when an Amazon S3 bucket policy is modified to share access with an external AWS account. This rule analyzes PutBucketPolicy events and compares the S3 bucket’s account ID to any account IDs referenced in the policy’s Effect=Allow statements. If the policy includes principals from accounts other than the bucket owner’s, the rule triggers an alert. This behavior may indicate an adversary backdooring a bucket for data exfiltration or cross-account persistence. For example, an attacker who

Suspicious Process Execution by Zoom

Identifies suspicious process execution associated with the Zoom desktop client on macOS and Linux. The rule detects shells, script interpreters, downloaders, and network utilities spawned by Zoom on either platform. On Linux, it also detects Zoom replacing its own process image with an executable outside the Zoom installation directory. These behaviors may indicate successful exploitation of a Zoom client vulnerability, including CVE-2026-53413.

AWS RDS DB Instance or Cluster Deletion Protection Disabled

Identifies the modification of an AWS RDS DB instance or cluster to disable the deletionProtection feature. Deletion protection prevents accidental or unauthorized deletion of RDS resources. Adversaries with sufficient permissions may disable this protection as a precursor to destructive actions, including the deletion of databases containing sensitive or business-critical data. This rule alerts when deletionProtection is explicitly set to false on an RDS DB instance or cluster.

AWS Lambda Function URL Created with Public Access

Identifies the creation or update of an AWS Lambda function URL configured with an authentication type of NONE, which exposes the function to unauthenticated invocation directly from the public internet. Adversaries can use a public function URL to establish a durable, internet-reachable entry point for command and control, data egress, or on-demand execution of attacker-controlled code, bypassing the need for valid AWS credentials to invoke the function. Function URLs with public access should

AWS Lambda Function Policy Updated to Allow Public Invocation

Identifies when an AWS Lambda function policy is updated to allow public invocation. This rule detects use of the AddPermission API where the Principal is set to "*", enabling any AWS account to invoke the function. Adversaries may abuse this configuration to establish persistence, create a covert execution path, or operate a function as an unauthenticated backdoor. Public invocation is rarely required outside very specific workloads and should be considered high-risk when performed unexpectedly

AWS Suspicious User Agent Fingerprint

Identifies successful AWS API calls where the CloudTrail user agent indicates offensive tooling or automated credential verification. This includes the AWS CLI or Boto3 reporting a Kali Linux distribution fingerprint (`distrib#kali`), and clients that identify as TruffleHog, which is commonly used to validate leaked secrets against live AWS APIs. These patterns are uncommon for routine production workloads and may indicate compromised credentials, unauthorized access, or security tooling operati

AWS S3 Object Versioning Suspended

Identifies when object versioning is suspended for an Amazon S3 bucket. Object versioning allows for multiple versions of an object to exist in the same bucket. This allows for easy recovery of deleted or overwritten objects. When object versioning is suspended for a bucket, it could indicate an adversary's attempt to inhibit system recovery following malicious activity. Additionally, when versioning is suspended, buckets can then be deleted.

AWS EC2 EBS Snapshot Access Removed

Identifies the removal of access permissions from a shared AWS EC2 EBS snapshot. EBS snapshots are essential for data retention and disaster recovery. Adversaries may revoke or modify snapshot permissions to prevent legitimate users from accessing backups, thereby obstructing recovery efforts after data loss or destructive actions. This tactic can also be used to evade detection or maintain exclusive access to critical backups, ultimately increasing the impact of an attack and complicating incid

AWS RDS DB Instance Made Public

Identifies the creation or modification of an Amazon RDS DB instance or cluster where the "publiclyAccessible" attribute is set to "true". Publicly accessible RDS instances expose a network endpoint on the public internet, which may allow unauthorized access if combined with overly permissive security groups, weak authentication, or misconfigured IAM policies. Adversaries may enable public access on an existing instance, or create a new publicly accessible instance, to establish persistence, mov

AWS GetFederationToken Followed by Console Login via Federation Exchange

Detects the three-event chain produced by tools like aws_consoler that convert exfiltrated long-term IAM access keys into browser-accessible AWS console sessions: GetFederationToken obtains temporary credentials, GetSigninToken exchanges them for a federation sign-in token via the AWS federation endpoint, and ConsoleLogin confirms the resulting console session was opened — all from the same source IP within two minutes. This sequence is a high-confidence indicator of credential abuse using stole

Kubernetes Sensitive RBAC Change Followed by Workload Modification

Detects a sequence where a principal creates or modifies a Role/ClusterRole to include high-risk permissions (e.g., wildcard access or escalation verbs) and then creates or patches a workload resource (DaemonSet, Deployment, or CronJob) shortly after, which may indicate RBAC-based privilege escalation followed by payload deployment. This pattern is often used by adversaries to gain unauthorized access to sensitive resources and deploy malicious payloads.

PKINIT Followed by Same-Principal U2U Service Ticket

Identifies a successful PKINIT ticket-granting ticket request followed within five seconds on the same domain controller and source address by a successful user-to-user service-ticket request whose service SID matches the PKINIT principal SID. This sequence is consistent with the KDC-visible ticket requests used in an UnPAC-the-Hash attack, before client-side PAC credential decryption and NT hash recovery. The certificate used for PKINIT may have been obtained through CertiGhost or another certi

AWS EKS Access Entry Created Then Deleted by Same Identity

Detects the creation of an Amazon EKS access entry followed by its deletion by the same identity within a short time window. EKS access entries define Kubernetes RBAC-level permissions for IAM principals in an EKS cluster. An adversary with EKS administrative access may temporarily grant themselves cluster access, use those permissions to create Kubernetes RBAC resources (ClusterRoleBindings, ServiceAccounts with privileged roles), and then delete the access entry to hide the evidence of the ini