Sigma Rules
131 rules found
Azure Active Directory Hybrid Health AD FS New Server
This detection uses azureactivity logs (Administrative category) to identify the creation or update of a server instance in an Azure AD Hybrid health AD FS service. A threat actor can create a new AD Health ADFS service and create a fake server instance to spoof AD FS signing logs. There is no need to compromise an on-prem AD FS server. This can be done programmatically via HTTP requests to Azure.
Azure Active Directory Hybrid Health AD FS Service Delete
This detection uses azureactivity logs (Administrative category) to identify the deletion of an Azure AD Hybrid health AD FS service instance in a tenant. A threat actor can create a new AD Health ADFS service and create a fake server to spoof AD FS signing logs. The health AD FS service can then be deleted after it is not longer needed via HTTP requests to Azure.
User Added to an Administrator's Azure AD Role
User Added to an Administrator's Azure AD Role
Azure Application Deleted
Identifies when a application is deleted in Azure.
Azure Application Gateway Modified or Deleted
Identifies when a application gateway is modified or deleted.
Azure Application Security Group Modified or Deleted
Identifies when a application security group is modified or deleted.
Azure Container Registry Created or Deleted
Detects when a Container Registry is created or deleted.
Number Of Resource Creation Or Deployment Activities
Number of VM creations or deployment activities occur in Azure via the azureactivity log.
Azure Device No Longer Managed or Compliant
Identifies when a device in azure is no longer managed or compliant
Azure Device or Configuration Modified or Deleted
Identifies when a device or device configuration in azure is modified or deleted.
Azure DNS Zone Modified or Deleted
Identifies when DNS zone is modified or deleted.
Azure Firewall Modified or Deleted
Identifies when a firewall is created, modified, or deleted.
Azure Firewall Rule Collection Modified or Deleted
Identifies when Rule Collections (Application, NAT, and Network) is being modified or deleted.
Granting Of Permissions To An Account
Identifies IPs from which users grant access to other users on azure resources and alerts when a previously unseen source IP address is used.
Azure Keyvault Key Modified or Deleted
Identifies when a Keyvault Key is modified or deleted in Azure.
Azure Key Vault Modified or Deleted
Identifies when a key vault is modified or deleted.
Azure Keyvault Secrets Modified or Deleted
Identifies when secrets are modified or deleted in Azure.
Azure Kubernetes Admission Controller
Identifies when an admission controller is executed in Azure Kubernetes. A Kubernetes Admission controller intercepts, and possibly modifies, requests to the Kubernetes API server. The behavior of this admission controller is determined by an admission webhook (MutatingAdmissionWebhook or ValidatingAdmissionWebhook) that the user deploys in the cluster. An adversary can use such webhooks as the MutatingAdmissionWebhook for obtaining persistence in the cluster. For example, attackers can intercept and modify the pod creation operations in the cluster and add their malicious container to every created pod. An adversary can use the webhook ValidatingAdmissionWebhook, which could be used to obtain access credentials. An adversary could use the webhook to intercept the requests to the API server, record secrets, and other sensitive information.
Azure Kubernetes Cluster Created or Deleted
Detects when a Azure Kubernetes Cluster is created or deleted.
Azure Kubernetes CronJob
Identifies when a Azure Kubernetes CronJob runs in Azure Cloud. Kubernetes Job is a controller that creates one or more pods and ensures that a specified number of them successfully terminate. Kubernetes Job can be used to run containers that perform finite tasks for batch jobs. Kubernetes CronJob is used to schedule Jobs. An Adversary may use Kubernetes CronJob for scheduling execution of malicious code that would run as a container in the cluster.
Azure Kubernetes Events Deleted
Detects when Events are deleted in Azure Kubernetes. An adversary may delete events in Azure Kubernetes in an attempt to evade detection.
Azure Kubernetes Network Policy Change
Identifies when a Azure Kubernetes network policy is modified or deleted.
Azure Kubernetes Pods Deleted
Identifies the deletion of Azure Kubernetes Pods.
Azure Kubernetes RoleBinding/ClusterRoleBinding Modified and Deleted
Detects the creation or patching of potential malicious RoleBinding/ClusterRoleBinding.
Azure Kubernetes Sensitive Role Access
Identifies when ClusterRoles/Roles are being modified or deleted.
Azure Kubernetes Secret or Config Object Access
Identifies when a Kubernetes account access a sensitive objects such as configmaps or secrets.
Azure Kubernetes Service Account Modified or Deleted
Identifies when a service account is modified or deleted.
Disabled MFA to Bypass Authentication Mechanisms
Detection for when multi factor authentication has been disabled, which might indicate a malicious activity to bypass authentication mechanisms.
Azure Network Firewall Policy Modified or Deleted
Identifies when a Firewall Policy is Modified or Deleted.
Azure Firewall Rule Configuration Modified or Deleted
Identifies when a Firewall Rule Configuration is Modified or Deleted.
Azure Point-to-site VPN Modified or Deleted
Identifies when a Point-to-site VPN is Modified or Deleted.
Azure Network Security Configuration Modified or Deleted
Identifies when a network security configuration is modified or deleted.
Azure Virtual Network Device Modified or Deleted
Identifies when a virtual network device is being modified or deleted. This can be a network interface, network virtual appliance, virtual hub, or virtual router.
Azure New CloudShell Created
Identifies when a new cloudshell is created inside of Azure portal.
Azure Owner Removed From Application or Service Principal
Identifies when a owner is was removed from a application or service principal in Azure.
Rare Subscription-level Operations In Azure
Identifies IPs from which users grant access to other users on azure resources and alerts when a previously unseen source IP address is used.
Azure Service Principal Created
Identifies when a service principal is created in Azure.
Azure Service Principal Removed
Identifies when a service principal was removed in Azure.
Azure Subscription Permission Elevation Via ActivityLogs
Detects when a user has been elevated to manage all Azure Subscriptions. This change should be investigated immediately if it isn't planned. This setting could allow an attacker access to Azure subscriptions in your environment.
Azure Suppression Rule Created
Identifies when a suppression rule is created in Azure. Adversary's could attempt this to evade detection.
Azure Virtual Network Modified or Deleted
Identifies when a Virtual Network is modified or deleted in Azure.
Azure VPN Connection Modified or Deleted
Identifies when a VPN connection is modified or deleted.
CA Policy Removed by Non Approved Actor
Monitor and alert on conditional access changes where non approved actor removed CA Policy.
CA Policy Updated by Non Approved Actor
Monitor and alert on conditional access changes. Is Initiated by (actor) approved to make changes? Review Modified Properties and compare "old" vs "new" value.
New CA Policy by Non-approved Actor
Monitor and alert on conditional access changes.
Account Created And Deleted Within A Close Time Frame
Detects when an account was created and deleted in a short period of time.
Bitlocker Key Retrieval
Monitor and alert for Bitlocker key retrieval.
Certificate-Based Authentication Enabled
Detects when certificate based authentication has been enabled in an Azure Active Directory tenant.