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Security ContentThreat Detection, Investigation, and Response for Public Cloud Guide

Google Cloud Platform – Rules by Use Case

Advanced Analytics versions that support GCP rules:

  • Legacy Data Structure Versions: not yet supported

  • Common Information Model Versions: i63.5 (supports all the rules listed in each use case)

Note

All model-based rules have rule names that end with "-F" or "-A". Rules without these rule name endings are fact-based rules.

Use Case

Rule ID: Rule Name

Abnormal Authentication & Access

GCP-Region-User-F: First time region for user

GCP-Region-Org-F: First time region for org

GCP-Operation-User-F: First time operation for user

GCP-DistinctOperationCount-User-A: Abnormal amount of distinct operations

GCP-UnauthorizedOperationCount-User-A: Abnormal amount of unauthorized operations

GCP-Service-User-F: First time cloud service for user

GCP-UserAgent-Org-F: First time user agent for org

GCP-Country-User-F: First time country for user

GCP-Time-User-A: Abnormal time for user activity in GCP

GCP-UserAgent-User-F: First time user agent seen for user

Privilege Escalation

GCP-SetIAMPublic: A cloud resource in GCP was set to public

GCP-IAMPublicFound: A public IAM policy was found on cloud resource in GCP

GCP-SetIAMAdmin: A cloud resource policy in GCP was modified with high permissions

GCP-UserRoleList-Org-F: First time role enumeration for user

GCP-UserRoleWrite-Org-F: First time role creation or modification for user

GCP-UserSetPolicy-Org-F: First time IAM policy modification for user

GCP-UserSetPolicyCritical-Org-F: First time critical IAM policy modification for user

GCP-ResourceSetPolicy-Org-F: First time IAM policy modification for resource

GCP-ResourceSetPolicyCritical-Org-F: First time critical IAM policy modification for resource

GCP-UserSetPolicy-Resource-F: First time IAM policy modification for user on this resource

GCP-DomainSetPolicy-Org-F: First time domain seen in IAM policy modification

GCP-MemberTypeSetPolicy-Org-F: First time user type seen in IAM policy modification

GCP-UserCreateServiceAccountCreds-Org-F: First time service account key/token creation for user

GCP-UserAddInstanceSSH-Org-F: First time instance SSH key modification for user

Cloud Data Protection

GCP-SetObjectPublic: An object in GCP storage was set to public

GCP-UserStorageList-Org-F: First time enumeration of storage buckets or objects for user

GCP-StorageListCount-User-A: Abnormal amount of enumeration operations of storage buckets or objects for this user

GCP-UserSetObjectACL-Org-F: First time modification of storage object ACL for user

GCP-UserSetObjectACL-Bucket-F: First time modification of storage object ACL for user in this bucket

GCP-UserSetObjectPublic-Org-F: First time public modification of storage object ACL for user

GCP-UserSetObjectPublic-Bucket-F: First time public modification of storage object ACL for user in this bucket

GCP-UserCreateBucket-Org-F: First time storage bucket creation for user

GCP-StorageGetCount-User-A: Abnormal amount of storage objects Get operations for this user

GCP-UserComputeList-Org-F: First time enumeration of compute resources for user

GCP-UserGetScreenshot-Org-F: First time instance screenshot for user

GCP-UserCreateSnapshot-Org-F: First time snapshot creation for user

GCP-UserCreateFromSnapshot-Org-F: First time instance/disk creation from a snapshot for user

GCP-UserAttachDisks-Org-F: First time disk attachment for user

B-GCP-StorageGetCount-User-A: Abnormal amount of storage objects get operations for this user

B-GCP-UserSetObjectACL-Org-F: First time modification of storage object ACL for user

B-GCP-UserSetObjectACL-Bucket-F: First time modification of storage object ACL for user in this bucket

B-GCP-UserSetObjectPublic-Org-F: First time public modification of storage object ACL for user

B-GCP-UserSetObjectPublic-Bucket-F: First time public modification of storage object ACL for user in this bucket

B-GCP-User-Bucket-F: First time this user has accessed this bucket

B-GCP-UserAgent-Bucket-F: First time this user agent was used to access this bucket

B-GCP-Operation-Bucket-F: First time this operation was used on this bucket

Malware

GCP-InstanceAutomatedScript: A startup/shutdown script was added to an instance in GCP

GCP-UserCreateObject-Org-F: First time storage object creation for user

GCP-UserCreateObjectCritical-Org-F: First time critical storage object creation for user

GCP-UserCreateImage-Org-F: First time image creation for user

B-GCP-UserCreateObject-Org-F: First time storage object creation for user

B-GCP-UserCreateObjectCritical-Org-F: First time critical storage object creation for user

Account Manipulation

GCP-UserCreateServiceAccount-Org-F: First time service account creation for user

Cryptomining

GCP-UserCreateInstance-Org-F: First time instance creation for user