Security & Compliance Center alert events

Operation	Description	Sample	Rule
AlertEntityGenerated	An entity was added to a Microsoft 365 security/compliance alert generated by an alert policy in the Microsoft Defender / Purview portal.	Y	Y
AlertTriggered	A Security & Compliance Center alert policy was triggered by activity matching the policy conditions.	Y	Y
AlertUpdated	The status or details of a Security and Compliance alert were updated (for example triage or resolution).	Y	N

AlertEntityGenerated

RecordType: SecurityComplianceAlerts

Description

An entity was added to a Microsoft 365 security/compliance alert generated by an alert policy in the Microsoft Defender / Purview portal.

Detection Fields #

Fields referenced by at least one attached detection rule. This view counts distinct rules and is not a complete schema for this catalog entry.

Name	Rules	Vendors
`Name`	4 detection rules	Splunk
`Operation`	4 detection rules	Splunk
`Workload`	3 detection rules	Splunk
`RescanVerdict`	1 detection rule	Splunk

Example Audit Record #

{
  "CreationTime": "2024-03-25T21:56:29",
  "Id": "bac7174a-19a9-4374-55fb-08dc4d166d45",
  "Operation": "AlertEntityGenerated",
  "OrganizationId": "75243ab2-44f8-435c-a7a6-b479385df6d4",
  "RecordType": 40,
  "ResultStatus": "Succeeded",
  "UserKey": "SecurityComplianceAlerts",
  "UserType": 4,
  "Version": 1,
  "Workload": "SecurityComplianceCenter",
  "ObjectId": "user15@splunkresearch.com",
  "UserId": "SecurityComplianceAlerts",
  "AlertEntityId": "user15@splunkresearch.com",
  "AlertId": "95adeea5-ede1-136f-5200-08dc4d1637c4",
  "AlertLinks": [
    {
      "AlertLinkHref": ""
    }
  ],
  "AlertType": "System",
  "Category": "ThreatManagement",
  "Comments": "New alert",
  "Data": {
    "etype": "User",
    "eid": "user15@splunkresearch.com",
    "tid": "75243ab2-44f8-435c-a7a6-b479385df6d4",
    "ts": "2024-03-25T21:54:22.0000000Z",
    "te": "2024-03-25T21:54:22.0000000Z",
    "op": "MailRedirect",
    "tdc": "1",
    "suid": "user15@splunkresearch.com",
    "ut": "Regular",
    "ssic": "0",
    "lon": "MailRedirect"
  },
  "EntityType": "User",
  "Name": "Creation of forwarding/redirect rule",
  "PolicyId": "d59a8fd4-1272-41ee-9408-86f7bcf72479",
  "Severity": "Informational",
  "Source": "Office 365 Security & Compliance",
  "Status": "Active"
}

Common Indicators #

Positive field/value combinations most frequently checked by detection rules attached to this catalog entry, derived from cross-vendor predicate analysis. This is separate from Fields accounting, which also includes exclusions and counts distinct attached rules.

Field	Kind	Value	Rules	Vendors
`Name` (splunk rule field)	contains	`a potentially malicious URL`	1 rule	splunk
`Name` (splunk rule field)	contains	`messages containing malicious`	1 rule	splunk
`Name` (splunk rule field)	in	`Email sending limit exceeded`	1 rule	splunk
`Name` (splunk rule field)	in	`Suspicious Email Forwarding Activity`	1 rule	splunk
`Name` (splunk rule field)	in	`Suspicious email sending patterns detected`	1 rule	splunk
`Name` (splunk rule field)	in	`User restricted from sending email`	1 rule	splunk
`Name` (splunk rule field)	starts_with	`Email reported by user as*`	1 rule	splunk
`RescanVerdict` (splunk rule field)	in	`Malware`	1 rule	splunk
`RescanVerdict` (splunk rule field)	in	`Phish`	1 rule	splunk

Detection Rules #

Full rule details for this catalog entry, including ATT&CK technique mappings and native queries →

Splunk #

O365 Email Reported By User Found Malicious source: The following analytic detects when an email submitted to Microsoft using the built-in report button in Outlook is found to be malicious. This capability is an enhanced protection feature that can be used within o365 tenants by users to…T1566, T1566.001, T1566.002
O365 Email Suspicious Behavior Alert source: The following analytic identifies when one of O365 the built-in security detections for suspicious email behaviors are triggered. These alerts often indicate that an attacker may have compromised a mailbox within the environment. Any…T1114, T1114.003
O365 Safe Links Detection source: The following analytic detects when any Microsoft Safe Links alerting is triggered. This behavior may indicate when user has interacted with a phishing or otherwise malicious link within the Microsoft Office ecosystem.T1566, T1566.001

Show 1 more (4 total) on the rules page

References #

AlertTriggered

RecordType: SecurityComplianceAlerts

Description

A Security & Compliance Center alert policy was triggered by activity matching the policy conditions.

Detection Fields #

Fields referenced by at least one attached detection rule. This view counts distinct rules and is not a complete schema for this catalog entry.

Name	Rules	Vendors
`Category`	1 detection rule	Splunk
`Operation`	1 detection rule	Splunk
`Workload`	1 detection rule	Splunk

Example Audit Record #

{
  "CreationTime": "2024-03-25T21:56:29",
  "Id": "95428ddb-9aa0-4bcf-84f4-08dc4d166d4c",
  "Operation": "AlertTriggered",
  "OrganizationId": "75243ab2-44f8-435c-a7a6-b479385df6d4",
  "RecordType": 40,
  "ResultStatus": "Succeeded",
  "UserKey": "SecurityComplianceAlerts",
  "UserType": 4,
  "Version": 1,
  "Workload": "SecurityComplianceCenter",
  "ObjectId": "95adeea5-ede1-136f-5200-08dc4d1637c4",
  "UserId": "SecurityComplianceAlerts",
  "AlertId": "95adeea5-ede1-136f-5200-08dc4d1637c4",
  "AlertLinks": [
    {
      "AlertLinkHref": ""
    }
  ],
  "AlertType": "System",
  "Category": "ThreatManagement",
  "Comments": "New alert",
  "Data": {
    "f3u": "user15@splunkresearch.com",
    "ts": "2024-03-25T21:54:00.0000000Z",
    "te": "2024-03-25T21:55:00.0000000Z",
    "op": "MailRedirect",
    "wl": "Exchange",
    "tid": "75243ab2-44f8-435c-a7a6-b479385df6d4",
    "tdc": "1",
    "reid": "136169be-3964-4b4c-2087-08dc4d1621a2",
    "wsrt": "2024-03-25T21:56:18",
    "mdt": "Audit",
    "rid": "0c04b79b-9148-4950-af22-2657dd53a92c",
    "cid": "d59a8fd4-1272-41ee-9408-86f7bcf72479",
    "ad": "This alert is triggered when someone in your organization sets up auto-forwarding, email forwarding, redirect rule or a mail flow rule -V1.0.0.5",
    "lon": "MailRedirect",
    "an": "Creation of forwarding/redirect rule",
    "sev": "Informational"
  },
  "Name": "Creation of forwarding/redirect rule",
  "PolicyId": "d59a8fd4-1272-41ee-9408-86f7bcf72479",
  "Severity": "Informational",
  "Source": "Office 365 Security & Compliance",
  "Status": "Active"
}

Common Indicators #

Field	Kind	Value	Rules	Vendors
`Category` (splunk rule field)	eq	`ThreatManagement`	1 rule	splunk

Detection Rules #

Full rule details for this catalog entry, including ATT&CK technique mappings and native queries →

Splunk #

O365 Security And Compliance Alert Triggered source: The following analytic identifies alerts triggered by the Office 365 Security and Compliance Center, indicating potential threats or policy violations. It leverages data from the o365_management_activity dataset, focusing on events where…T1078, T1078.004

References #

AlertUpdated

RecordType: SecurityComplianceAlerts

Description

The status or details of a Security and Compliance alert were updated (for example triage or resolution).

Example Audit Record #

{
  "CreationTime": "2024-03-25T21:54:15",
  "Id": "0d0eee3a-7bbe-005f-54eb-08dc4d161d48",
  "Operation": "AlertUpdated",
  "OrganizationId": "75243ab2-44f8-435c-a7a6-b479385df6d4",
  "RecordType": 40,
  "ResultStatus": "Succeeded",
  "UserKey": "SecurityComplianceAlerts",
  "UserType": 4,
  "Version": 1,
  "Workload": "SecurityComplianceCenter",
  "ObjectId": "95adeea5-ede1-136f-ae00-08dc4d156130",
  "UserId": "SecurityComplianceAlerts",
  "AlertId": "95adeea5-ede1-136f-ae00-08dc4d156130",
  "AlertLinks": [
    {
      "AlertLinkHref": ""
    }
  ],
  "AlertType": "System",
  "Category": "ThreatManagement",
  "Comments": "New alert",
  "Data": {
    "f3u": "user15@splunkresearch.com",
    "ts": "2024-03-25T21:48:00.0000000Z",
    "te": "2024-03-25T21:49:00.0000000Z",
    "op": "MailRedirect",
    "wl": "Exchange",
    "tid": "75243ab2-44f8-435c-a7a6-b479385df6d4",
    "tdc": "1",
    "reid": "884b4cf9-3329-47aa-7241-08dc4d1556b2",
    "wsrt": "2024-03-25T21:53:15",
    "mdt": "Audit",
    "rid": "0c04b79b-9148-4950-af22-2657dd53a92c",
    "cid": "d59a8fd4-1272-41ee-9408-86f7bcf72479",
    "ad": "This alert is triggered when someone in your organization sets up auto-forwarding, email forwarding, redirect rule or a mail flow rule -V1.0.0.5",
    "lon": "MailRedirect",
    "an": "Creation of forwarding/redirect rule",
    "sev": "Informational"
  },
  "Name": "Creation of forwarding/redirect rule",
  "PolicyId": "d59a8fd4-1272-41ee-9408-86f7bcf72479",
  "Severity": "Informational",
  "Source": "Office 365 Security & Compliance",
  "Status": "Active"
}

References #

any: Security & Compliance Center alert events (catch-all)

Scope grouping: This repository-authored catalog entry represents a broad attribution scope, not a distinct emitted event or operation. Any sample below is a representative record from that scope; attached rules, if any, are listed separately.

RecordType: SecurityComplianceAlerts

Description

Catch-all for M365-SecurityComplianceAlerts rules matching the RecordType but no specific Operation.

Detection Fields #

Fields referenced by at least one attached detection rule. This view counts distinct rules and is not a complete schema for this catalog entry.

Name	Rules	Vendors
`event.provider`	1 detection rule	Elastic

Detection Rules #

Full rule details for this catalog entry, including ATT&CK technique mappings and native queries →

Elastic #

M365 Purview Security Compliance Signal source low: Collects alerts generated by Microsoft Purview (formerly Office 365 Security & Compliance Center) through the SecurityComplianceCenter provider. These alerts represent policy violations, compliance issues, and threats detected by Microsoft Purview's built-in detection capabilities including DLP policy matches, eDiscovery actions, retention policy violations, and other compliance-related events. This building block rule generates security events for correlation, threat hunting, and telemetry collection without creating standalone alerts, reducing alert fatigue while maintaining comprehensive visibility into Microsoft Purview's compliance and security detections.

References #

M365 audit records use different field names on each surface #

The same Unified Audit Log record uses different field names on each surface. A query built for one surface can silently miss on another. These pages document the Management Activity API JSON names, the same names Search-UnifiedAuditLog and the Office 365 Management Activity API return.

Purview CSV export flattens each record to four columns (CreationDate, UserIds, Operations, AuditData). The API field names live only inside the AuditData JSON blob. Expand it with ConvertFrom-Json. The wrapper columns are renamed too: CreationDate not CreationTime, UserIds not UserId, Operations not Operation.
Sentinel's OfficeActivity table renames several fields and turns two integer enum columns into strings. The table below maps them.

API JSON (event pages)	OfficeActivity column	Note
`Id`	`OfficeId`	Renamed.
`Workload`	`OfficeWorkload`	Renamed.
`ObjectId`	`OfficeObjectId`	Renamed.
`CreationTime`	`TimeGenerated`	Renamed. OfficeActivity has no `CreationTime` column.
`SiteUrl`	`Site_Url`	Renamed (SharePoint family).
`RecordType`	`RecordType`	Same name; the Int32 enum becomes its string enum name.
`UserType`	`UserType`	Same name; the Int32 enum becomes a string.
`ClientIP`	`ClientIP`, `Client_IPAddress`	Both columns present on OfficeActivity.
`Scope`	(none)	No OfficeActivity equivalent under any name. Recover it from the API JSON or the Purview `AuditData` blob.
`Operation`, `UserId`, `ResultStatus`, `UserKey`, `AppAccessContext`, `OrganizationId`	same names	Unchanged. No `_s` / `_d` suffixes (a native table, not a custom log).

Mapping verified against the OfficeActivity table reference, the Management Activity API schema, and the Purview audit-record export format.