Azure Event Hubs Azure-Microsoft.EventHub

3 operations, identified by operationName in the audit log.

operationName	Description
_catch_all	Catch-all for Azure-Microsoft.EventHub rules matching the resource provider but no specific operation.
Microsoft.EventHub/namespaces/authorizationRules/write	Creates or updates a Shared Access Policy on an Event Hub namespace, controlling send/listen/manage permissions.
Microsoft.EventHub/namespaces/eventhubs/delete	Deletes an event hub within a namespace, destroying any unconsumed messages.

_catch_all: Azure Event Hubs (catch-all)

Resource provider: Azure-Microsoft.EventHub

Description

Catch-all for Azure-Microsoft.EventHub rules matching the resource provider but no specific operation.

Fields #

Name	Description
`OperationName`	Localized display name of the ARM operation. Sentinel also exposes OperationNameValue (the uppercase ARM operation string the catalog keys on).
`OperationNameValue`	The ARM operation string (e.g. MICROSOFT.COMPUTE/VIRTUALMACHINES/WRITE). The per-event discriminator; case-insensitive.
`ResourceProvider`	The Azure resource-provider namespace (e.g. Microsoft.Compute).
`ResourceId`	Full ARM resource id the operation acted on.
`Caller`	Identity that initiated the operation (UPN, object id, or service principal).
`CallerIpAddress`	IP address of the caller.
`ActivityStatusValue`	Operation status (Started, Succeeded, Failed, Accepted).
`Level`	Severity level of the activity record (Informational, Warning, Error, Critical).
`Authorization`	RBAC authorization context: the action evaluated, scope, and role assignment.
`Properties`	Operation-specific properties bag; shape varies by operation.
`SubscriptionId`	GUID of the subscription the resource belongs to.
`TimeGenerated`	UTC timestamp when the event was recorded.

References #

Azure resource provider operations reference https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
Azure Monitor AzureActivity table schema https://learn.microsoft.com/en-us/azure/azure-monitor/reference/tables/azureactivity

Microsoft.EventHub/namespaces/authorizationRules/write

Resource provider: Azure-Microsoft.EventHub

Description

Creates or updates a Shared Access Policy on an Event Hub namespace, controlling send/listen/manage permissions.

Fields #

Name	Description
`OperationName`	Localized display name of the ARM operation. Sentinel also exposes OperationNameValue (the uppercase ARM operation string the catalog keys on).
`OperationNameValue`	The ARM operation string (e.g. MICROSOFT.COMPUTE/VIRTUALMACHINES/WRITE). The per-event discriminator; case-insensitive.
`ResourceProvider`	The Azure resource-provider namespace (e.g. Microsoft.Compute).
`ResourceId`	Full ARM resource id the operation acted on.
`Caller`	Identity that initiated the operation (UPN, object id, or service principal).
`CallerIpAddress`	IP address of the caller.
`ActivityStatusValue`	Operation status (Started, Succeeded, Failed, Accepted).
`Level`	Severity level of the activity record (Informational, Warning, Error, Critical).
`Authorization`	RBAC authorization context: the action evaluated, scope, and role assignment.
`Properties`	Operation-specific properties bag; shape varies by operation.
`SubscriptionId`	GUID of the subscription the resource belongs to.
`TimeGenerated`	UTC timestamp when the event was recorded.

Detection Rules #

View all rules referencing this event →

Elastic #

Azure Event Hub Authorization Rule Created or Updated source medium: Identifies when an Event Hub Authorization Rule is created or updated in Azure. An authorization rule is associated with specific rights, and carries a pair of cryptographic keys. When you create an Event Hubs namespace, a policy rule named RootManageSharedAccessKey is created for the namespace. This has manage permissions for the entire namespace and it's recommended that you treat this rule like an administrative root account and don't use it in your application.

References #

Azure resource provider operations reference https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
Azure Monitor AzureActivity table schema https://learn.microsoft.com/en-us/azure/azure-monitor/reference/tables/azureactivity

Microsoft.EventHub/namespaces/eventhubs/delete

Resource provider: Azure-Microsoft.EventHub

Description

Deletes an event hub within a namespace, destroying any unconsumed messages.

Fields #

Name	Description
`OperationName`	Localized display name of the ARM operation. Sentinel also exposes OperationNameValue (the uppercase ARM operation string the catalog keys on).
`OperationNameValue`	The ARM operation string (e.g. MICROSOFT.COMPUTE/VIRTUALMACHINES/WRITE). The per-event discriminator; case-insensitive.
`ResourceProvider`	The Azure resource-provider namespace (e.g. Microsoft.Compute).
`ResourceId`	Full ARM resource id the operation acted on.
`Caller`	Identity that initiated the operation (UPN, object id, or service principal).
`CallerIpAddress`	IP address of the caller.
`ActivityStatusValue`	Operation status (Started, Succeeded, Failed, Accepted).
`Level`	Severity level of the activity record (Informational, Warning, Error, Critical).
`Authorization`	RBAC authorization context: the action evaluated, scope, and role assignment.
`Properties`	Operation-specific properties bag; shape varies by operation.
`SubscriptionId`	GUID of the subscription the resource belongs to.
`TimeGenerated`	UTC timestamp when the event was recorded.

Common Indicators #

Field/value combinations most frequently checked by detection rules targeting this event, derived from cross-vendor predicate analysis.

Field	Kind	Value	Rules	Vendors
`event.outcome`	in	`Success`	1 rule	elastic
`event.outcome`	in	`success`	1 rule	elastic

Detection Rules #

View all rules referencing this event →

Elastic #

Azure Event Hub Deleted source medium: Identifies an Event Hub deletion in Azure. An Event Hub is an event processing service that ingests and processes large volumes of events and data. An adversary may delete an Event Hub in an attempt to evade detection.

References #

Azure resource provider operations reference https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
Azure Monitor AzureActivity table schema https://learn.microsoft.com/en-us/azure/azure-monitor/reference/tables/azureactivity

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`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)

Azure Event Hubs Azure-Microsoft.EventHub

_catch_all: Azure Event Hubs (catch-all)

Description

Fields #

References #

Microsoft.EventHub/namespaces/authorizationRules/write

Description

Fields #

Detection Rules #

Elastic #

References #

Microsoft.EventHub/namespaces/eventhubs/delete

Description

Fields #

Common Indicators #

Detection Rules #

Elastic #

References #

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