Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

2,831 detections

This rule identifies when an Azure Virtual Network or Virtual Network Gateway is modified or deleted. This activity is captured through Azure Activity Logs, specifically looking for 'MICROSOFT.NETWORK/VIRTUALNETWORKGATEWAYS/' or 'MICROSOFT.NETWORK/VIRTUALNETWORKS/' operations that end with '/WRITE' or '/DELETE'. Such actions can indicate unauthorized changes to network infrastructure, potentially leading to denial of service, network segmentation bypass, or other security incidents.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0021
Detects when an administrator grants an application either application permissions (app roles) or highly privileged delegated permissions within an Azure environment. This action is logged in the Azure audit logs as 'Add app role assignment to service principal'. Such assignments can lead to persistence or privilege escalation if abused.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0019
Identifies when a service account is modified, created, updated, enabled, or undeleted in Google Cloud. This rule specifically looks for API calls related to service account management, which could indicate an attacker establishing persistence, escalating privileges, or otherwise manipulating cloud resources.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0019
Detects when a Microsoft Cloud App Security reported for users whose account were terminated in Azure AD, but still perform activities in other platforms such as AWS or Salesforce.
This is especially relevant for users who use another account to manage resources, since these accounts are often not terminated when a user leaves the company.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
104
Identifies disabling of default Amazon Elastic Block Store (EBS) encryption in the current region.
Disabling default encryption does not change the encryption status of your existing volumes.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
003
An attempt to export an AWS EC2 instance has been detected. A VM Export might indicate an attempt to extract information from an instance.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
003
Detects the modification of an EC2 snapshot's permissions to enable access from another account
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
203
Identifies when a DNS Zone is modified or deleted in Google Cloud.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
103
Identifies when a application gateway is modified or deleted.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
002
Identifies when a application security group is modified or deleted.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
002
Detects when storage bucket is modified or deleted in Google Cloud.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
302
Identifies when sensitive information is re-identified in google Cloud.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
002
Identifies when a VPN Tunnel Modified or Deleted in Google Cloud.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
102
Identifies when an EKS cluster is created or deleted.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Detects when a user tampers with S3 data management in Amazon Web Services.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Identifies when a key vault is modified or deleted.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Identifies when a network security configuration is modified or deleted.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Identifies when a VPN connection is modified or deleted.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Detects when an end user consents to an application
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Detects when end user consent is blocked due to risk-based consent.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
Detects when an application is granted delegated or app role permissions for Microsoft Graph, Exchange, Sharepoint, or Azure AD
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
001
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