Alerts detection update

contentctl.yml

@@ -182,6 +182,12 @@ apps:
   version: 1.4.1
   description: description of app
   hardcoded_path: https://attack-range-appbinaries.s3.us-west-2.amazonaws.com/microsoft-defender-advanced-hunting-add-on-for-splunk_141.tgz
+- uid: 6207
+  title: Splunk Add-on for Microsoft Security
+  appid: Splunk_TA_MS_Security
+  version: 2.3.0
+  description: description of app
+  hardcoded_path: https://attack-range-appbinaries.s3.us-west-2.amazonaws.com/splunk-add-on-for-microsoft-security_230.tgz
 - uid: 2734
   title: URL Toolbox
   appid: URL_TOOLBOX

data_sources/ms365_defender_incident_alerts.yml

@@ -0,0 +1,234 @@
+name: MS365 Defender Incident Alerts
+id: 12345678-90ab-cdef-1234-567890abcdef
+version: 1
+date: '2024-07-18'
+author: Bhavin Patel, Splunk
+description: Data source object for MS365 Defender Incident Alerts
+source: ms365_defender_incident_alerts
+sourcetype: ms365:defender:incident:alerts
+supported_TA:
+- name: Splunk Add-on for Microsoft Security
+  url: https://splunkbase.splunk.com/app/6207
+  version: 2.3.0
+fields:
+- actorName
+- alertId
+- app
+- assignedTo
+- body
+- category
+- classification
+- creationTime
+- date_hour
+- date_mday
+- date_minute
+- date_month
+- date_second
+- date_wday
+- date_year
+- date_zone
+- description
+- dest
+- detectionSource
+- detectorId
+- determination
+- devices{}.aadDeviceId
+- devices{}.defenderAvStatus
+- devices{}.deviceDnsName
+- devices{}.firstSeen
+- devices{}.healthStatus
+- devices{}.loggedOnUsers{}.accountName
+- devices{}.loggedOnUsers{}.domainName
+- devices{}.mdatpDeviceId
+- devices{}.onboardingStatus
+- devices{}.osBuild
+- devices{}.osPlatform
+- devices{}.osProcessor
+- devices{}.rbacGroupName
+- devices{}.riskScore
+- devices{}.version
+- devices{}.vmMetadata
+- devices{}.vmMetadata.cloudProvider
+- devices{}.vmMetadata.resourceId
+- devices{}.vmMetadata.subscriptionId
+- devices{}.vmMetadata.vmId
+- entities{}.aadUserId
+- entities{}.accountName
+- entities{}.applicationId
+- entities{}.applicationName
+- entities{}.detectionStatus
+- entities{}.deviceId
+- entities{}.domainName
+- entities{}.entityType
+- entities{}.evidenceCreationTime
+- entities{}.fileName
+- entities{}.filePath
+- entities{}.ipAddress
+- entities{}.parentProcessCreationTime
+- entities{}.parentProcessFileName
+- entities{}.parentProcessFilePath
+- entities{}.parentProcessId
+- entities{}.processCommandLine
+- entities{}.processCreationTime
+- entities{}.processId
+- entities{}.remediationStatus
+- entities{}.remediationStatusDetails
+- entities{}.sha1
+- entities{}.sha256
+- entities{}.userPrincipalName
+- entities{}.userSid
+- entities{}.verdict
+- eventtype
+- firstActivity
+- host
+- id
+- incidentId
+- index
+- investigationId
+- investigationState
+- lastActivity
+- lastUpdatedTime
+- linecount
+- mitreTechniques{}
+- mitre_technique_id
+- providerAlertId
+- resolvedTime
+- serviceSource
+- severity
+- signature
+- signature_id
+- source
+- sourcetype
+- splunk_server
+- splunk_server_group
+- src
+- status
+- subject
+- tag
+- tag::app
+- tag::eventtype
+- threatFamilyName
+- timeendpos
+- timestartpos
+- title
+- type
+- user
+- user_name
+- _bkt
+- _cd
+- _eventtype_color
+- _indextime
+- _raw
+- _serial
+- _si
+- _sourcetype
+- _subsecond
+- _time
+example_log: |
+  {
+    "alertId": "da638001130101730338_582949328",
+    "providerAlertId": "da638001130101730338_582949328",
+    "incidentId": 486,
+    "serviceSource": "MicrosoftDefenderForEndpoint",
+    "creationTime": "2022-09-30T05:36:50.1732198Z",
+    "lastUpdatedTime": "2022-11-19T01:35:42.7033333Z",
+    "resolvedTime": "2022-10-01T01:36:00.5066667Z",
+    "firstActivity": "2022-09-30T05:06:43.8196597Z",
+    "lastActivity": "2022-09-30T05:06:43.8196597Z",
+    "title": "Suspicious URL clicked",
+    "description": "A user opened a potentially malicious URL. This alert was triggered based on a Microsoft Defender for Office 365 alert.",
+    "category": "InitialAccess",
+    "status": "Resolved",
+    "severity": "High",
+    "investigationId": null,
+    "investigationState": "UnsupportedAlertType",
+    "classification": "TruePositive",
+    "determination": "SecurityTesting",
+    "detectionSource": "MTP",
+    "detectorId": "359b36eb-337c-4f1c-b280-8c5e08f9c4a0",
+    "assignedTo": "[email protected]",
+    "actorName": null,
+    "threatFamilyName": null,
+    "mitreTechniques": [
+      "T1566.002"
+    ],
+    "devices": [
+      {
+        "mdatpDeviceId": "c7e147cb0eb3534a4dcea5acb8e61c933713b145",
+        "aadDeviceId": null,
+        "deviceDnsName": "metal-win10v.metal.m365dpoc.com",
+        "osPlatform": "Windows10",
+        "version": "1809",
+        "osProcessor": "x64",
+        "osBuild": 17763,
+        "healthStatus": "Active",
+        "riskScore": "High",
+        "rbacGroupName": "Full Auto Clients",
+        "firstSeen": "2022-08-08T08:51:02.455Z",
+        "tags": [
+          "Full auto"
+        ],
+        "defenderAvStatus": "Updated",
+        "onboardingStatus": "Onboarded",
+        "vmMetadata": {
+          "vmId": "17881b39-b03f-4a2c-9b56-078be1330bd0",
+          "cloudProvider": "Unknown",
+          "resourceId": "/subscriptions/29e73d07-8740-4164-a257-592a19a7b77c/resourceGroups/MSDXV2/providers/Microsoft.Compute/virtualMachines/MSDXV2-Win10V",
+          "subscriptionId": "29e73d07-8740-4164-a257-592a19a7b77c"
+        },
+        "loggedOnUsers": [
+          {
+            "accountName": "hetfield",
+            "domainName": "MSDXV2"
+          }
+        ]
+      }
+    ],
+    "entities": [
+      {
+        "entityType": "Process",
+        "evidenceCreationTime": "2022-09-30T05:36:50.2133333Z",
+        "verdict": "Suspicious",
+        "remediationStatus": "None",
+        "sha1": "6cbce4a295c163791b60fc23d285e6d84f28ee4c",
+        "sha256": "de96a6e69944335375dc1ac238336066889d9ffc7d73628ef4fe1b1b160ab32c",
+        "fileName": "powershell.exe",
+        "filePath": "",
+        "processId": 7068,
+        "processCommandLine": "powershell.exe  -command \"                                                            $Process = New-Object System.Diagnostics.Process;                                                            $Process.StartInfo.FileName = 'https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgcajebahdi.corporatelogon.xyz%2Fab%2Fjnkmbkkdnlgedc&data=05%7C01%7Chetfield%40metal.m365dpoc.com%7Cca409616a82145bd6a5f08daa2a10255%7C1a49212958c8401191cd245285f5345c%7C0%7C0%7C638001109710345383%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=FyEjRS5qOd2SkJELlueibuxLFMYNjL7fz8EbuOAvFwg%3D&reserved=0';                                                            $Process.StartInfo.UseShellExecute = $true;                                                            $Process.Start() | Out-Null;                                                            \"                                                        ",
+        "processCreationTime": "2022-09-30T05:06:43.3390523Z",
+        "parentProcessId": 7116,
+        "parentProcessCreationTime": "2022-09-30T05:06:43.3100364Z",
+        "accountName": "hetfield",
+        "userSid": "S-1-5-21-2300221942-1987151257-321556088-1104"
+      },
+      {
+        "entityType": "File",
+        "evidenceCreationTime": "2022-09-30T05:36:50.2133333Z",
+        "verdict": "Suspicious",
+        "remediationStatus": "None",
+        "sha1": "6cbce4a295c163791b60fc23d285e6d84f28ee4c",
+        "sha256": "de96a6e69944335375dc1ac238336066889d9ffc7d73628ef4fe1b1b160ab32c",
+        "fileName": "powershell.exe",
+        "filePath": ""
+      },
+      {
+        "entityType": "User",
+        "evidenceCreationTime": "2022-09-30T05:36:50.2133333Z",
+        "verdict": "Suspicious",
+        "remediationStatus": "None",
+        "accountName": "hetfield",
+        "domainName": "metal.m365dpoc",
+        "userSid": "S-1-5-21-2300221942-1987151257-321556088-1104",
+        "aadUserId": "e848b07a-87af-4448-9979-09f0b809c8d4",
+        "userPrincipalName": "daftpunk"
+      },
+      {
+        "entityType": "Url",
+        "evidenceCreationTime": "2022-09-30T05:36:50.2133333Z",
+        "verdict": "Suspicious",
+        "remediationStatus": "None",
+        "url": "http://gcajebahdi.corporatelogon.xyz/ab/jnkmbkkdnlgedc"
+      }
+    ]
+  }

detections/endpoint/detect_critical_alerts_from_security_tools.yml

@@ -2,39 +2,47 @@ name: Detect Critical Alerts from Security Tools
 id: 483e8a68-f2f7-45be-8fc9-bf725f0e22fd
 version: 1
 date: '2024-10-09'
-author: Gowthamaraj Rajendran, Patrick Bareiss, Bhavin Patel, Splunk
+author: Gowthamaraj Rajendran, Patrick Bareiss, Bhavin Patel, Bryan Pluta, Splunk
 status: production
 type: TTP
 data_source:
 - Windows Defender Alerts
+- MS365 Defender Incident Alerts
 description: The following analytics is to detect high and critical alerts from endpoint security tools such as Microsoft Defender, Carbon Black, and Crowdstrike. This query aggregates and summarizes critical severity alerts from the Alerts data model, providing details such as the alert signature, application, description, source, destination, and timestamps, while applying custom filters and formatting for enhanced analysis in a SIEM environment.This capability allows security teams to efficiently allocate resources and maintain a strong security posture, while also supporting compliance with regulatory requirements by providing a clear record of critical security events. We tested these detections with logs from Microsoft Defender, however this detection should work for any security alerts that are ingested into the alerts data model.
-search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Alerts where Alerts.severity IN ("high","critical") by Alerts.signature Alerts.app, Alerts.severity, Alerts.description, source, Alerts.id, Alerts.dest | `drop_dm_object_name("Alerts")` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `detect_critical_alerts_from_security_tools_filter`'
-how_to_implement: In order to properly run this search, you to ingest alerts data from other security products such as Crowdstrike, Microsoft Defender, or Carbon Black using appropriate TAs for that technology. Once ingested, the fields should be mapped to the Alerts data model. Make sure to apply transformation on the data if necessary.
+search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime values(Alerts.description) as description values(Alerts.mitre_technique_id) as annotations.mitre_attack.mitre_technique_id values(Alerts.severity) as severity values(Alerts.type) as type values(Alerts.severity_id) as severity_id values(Alerts.signature) as signature values(Alerts.signature_id) as signature_id values(Alerts.dest) as dest from datamodel=Alerts where  Alerts.severity IN ("high","critical") by Alerts.src Alerts.user Alerts.id Alerts.vendor sourcetype 
+| `drop_dm_object_name("Alerts")` 
+| `security_content_ctime(firstTime)` 
+| `security_content_ctime(lastTime)` 
+| eval risk_score=case(severity="informational", 2, severity="low", 5, severity="medium", 10, severity="high", 50, severity="critical" , 100) | `detect_critical_alerts_from_security_tools_filter`'
+how_to_implement: In order to properly run this search, you to ingest alerts data from other security products such as Crowdstrike, Microsoft Defender, or Carbon Black using appropriate TAs for that technology. Once ingested, the fields should be mapped to the Alerts data model. Make sure to apply transformation on the data if necessary. The risk_score field is used to calculate the risk score for the alerts and the mitre_technique_id field is used to map the alerts to the MITRE ATT&CK framework is dynamically created by the detection when this is triggered. These fields need not be set in the adaptive response actions. 
 known_false_positives: False positives may vary by endpoint protection tool; monitor and filter out the alerts that are not relevant to your environment.
 references:
 - https://techcommunity.microsoft.com/t5/microsoft-defender-for-cloud/accessing-microsoft-defender-for-cloud-alerts-in-splunk-using/ba-p/938228
 - https://docs.splunk.com/Documentation/CIM/5.3.2/User/Alerts
 - https://learn.microsoft.com/en-us/defender-endpoint/api/raw-data-export-event-hub
 drilldown_searches:
-- name: View the detection results for - "$dest$"
-  search: '%original_detection_search% | search  dest = "$dest$"'
+- name: View the detection results for - "$dest$" and "$user$"
+  search: '%original_detection_search% | search  dest = "$dest$" user = "$user$"'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
-- name: View risk events for the last 7 days for - "$dest$"
-  search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$") starthoursago=168  | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
+- name: View risk events for the last 7 days for - "$dest$" and "$user$"
+  search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$", "$user$") starthoursago=168  | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
 tags:
   analytic_story:
   - Critical Alerts
   asset_type: Endpoint
   atomic_guid: []
-  confidence: 90
-  impact: 90
-  message: $severity$ alert for $dest$ from $source$ - $signature$
-  mitre_attack_id:
-  - T1484
+  confidence: 50
+  impact: 50
+  message: $severity$ alert for $user$ from $sourcetype$ - $signature$
+  mitre_attack_id: []
   observable:
+  - name: user
+    type: User
+    role:
+    - Victim
   - name: dest
     type: Endpoint
     role:
@@ -44,14 +52,28 @@ tags:
   - Splunk Enterprise Security
   - Splunk Cloud
   required_fields:
-  - _time
-  - app
-  - name
-  risk_score: 81
+  - Alerts.description
+  - Alerts.mitre_technique_id
+  - Alerts.severity
+  - Alerts.type
+  - Alerts.severity_id
+  - Alerts.signature
+  - Alerts.dest
+  - Alerts.src
+  - Alerts.user
+  - Alerts.id
+  - Alerts.vendor
+  - sourcetype
+  risk_score: 25
   security_domain: endpoint
 tests:
 - name: True Positive Test
   attack_data:
   - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/suspicious_behaviour/alerts/AdvancedHunting.log
     source: eventhub://windowsdefenderlogs
     sourcetype: mscs:azure:eventhub:defender:advancedhunting
+- name: True Positive Test
+  attack_data:
+  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/suspicious_behaviour/alerts/defender_incident_alerts.log
+    source: m365_defender_incident_alerts
+    sourcetype: ms365:defender:incident:alerts