Detection rules › Kusto

Darktrace Model Breach

This is a third-party alert feed, not a detection over modeled telemetry. The vendor product raised the finding; this rule forwards it into the SIEM. It is searchable for reference but is excluded from the detection-rule browse and the ATT&CK coverage matrix.

Severity: medium
Time window: 5m
Source: github.com/Azure/Azure-Sentinel

'This rule creates Microsoft Sentinel Alerts based on Darktrace Model Breaches, fetched every 5 minutes.'

Rule body kusto

id: a3c7b8ed-56a9-47b7-98e5-2555c16e17c9
name: Darktrace Model Breach
description: |
  'This rule creates Microsoft Sentinel Alerts based on Darktrace Model Breaches, fetched every 5 minutes.'
severity: Medium
requiredDataConnectors:
  - connectorId: DarktraceRESTConnector
    dataTypes:
      - darktrace_model_alerts_CL
queryFrequency: 5m
queryPeriod: 5m 
triggerOperator: gt
triggerThreshold: 0
tactics: # tactics pulled dynamically
relevantTechniques:
query: |
  darktrace_model_alerts_CL 
  | where dtProduct_s =="Policy Breach"
  | project-rename EventSeverity=score_d, EventStartTime=breachTime_s, NetworkRuleName=modelName_s, NetworkRuleNumber=pid_d, ThreatId=threatID_d, ThreatCategory=dtProduct_s, SrcIpAddr=SourceIP, SrcHostname=hostname_s, SrcMacAddr=sourceMac_s, SrcPortNumber=sourcePort_s, DstIpAddr=destIP_s, DstPortNumber=destPort_s, DstHostname=destHost_s, DstMacAddr=destMac_s, DtCompliance=compliance_b, DtClientSensor=cSensor_b, DtDescription=description_s, DtAntigena=antigena_b, DtDeviceID=deviceId_d, DtSubnetID=sid_d, DtTags=tags_s, DtMitreTechniques=mitreTechniques_s, DtMessage=Message, DtUUID=uuid_g, DtBreachURL=breachUrl_s, DtSrcTypeLabel=typeLabel_s, DtTriggeredComponents=triggeredComponents_s, DtDetails=details_s, DtLongitude=longitude_d, DtLatitude=latitude_d, DtCategory=Category
  | extend EventCount=1, EventType="NetworkSession", EventSchema="NetworkSession", EventSchemaVersion="0.2.2", EventResult="Success", DvcAction = "Allow", EventVendor = "Darktrace", EventProduct = "Darktrace DETECT", EventEndTime=EventStartTime, ThreatName=NetworkRuleName, ThreatRiskLevel=EventSeverity
  | extend DtSentinelCategory = case(DtCategory == "Suspicious", "Medium", 
                                    DtCategory == "Critical", "High",
                                    "Informational") 
eventGroupingSettings:
  aggregationKind: AlertPerResult
entityMappings:
  - entityType: Host
    fieldMappings:
      - identifier: HostName
        columnName: SrcHostname
  - entityType: Host
    fieldMappings:
      - identifier: HostName
        columnName: DstHostname
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: SrcIpAddr
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: DstIpAddr
customDetails:
  SrcMacAddr: SrcMacAddr
  EventSeverity: EventSeverity
  EventStartTime: EventStartTime
  NetworkRuleName: NetworkRuleName
  NetworkRuleNumber: NetworkRuleNumber
  ThreatId: ThreatId
  DtSentinelCategory: DtSentinelCategory
  SrcPortNumber: SrcPortNumber
  DstPortNumber: DstPortNumber
  DstMacAddr: DstMacAddr
  DtCompliance: DtCompliance
  DtDescription: DtDescription
  DtCategory: DtCategory
  DtDeviceID: DtDeviceID
# These are described here - this is why we're leaving tactics and techniques above empty
alertDetailsOverride:
  # model breach name here
  alertDisplayNameFormat: 'Darktrace: {{ThreatRiskLevel}} - {{NetworkRuleName}}' # Up to 256 chars and 3 placeholders
  alertDescriptionFormat: '{{DtMessage}}' # Up to 5000 chars and 3 placeholders
  # MITRE tactic
  alertTacticsColumnName: # leave empty
  alertSeverityColumnName: # leave empty
  alertDynamicProperties:
    - alertProperty: AlertLink
      value: DtBreachURL
    - alertProperty: ProviderName
      value: EventVendor
    - alertProperty: ProductName
      value: EventProduct
    - alertProperty: ProductComponentName
      value: ThreatCategory
    - alertProperty: Severity
      value: DtSentinelCategory
version: 1.1.0
kind: NRT

Stages and Predicates

Stage 1: `source`

darktrace_model_alerts_CL

Stage 2: `where`

| where dtProduct_s =="Policy Breach"

Stage 3: `project-rename`

| project-rename EventSeverity=score_d, EventStartTime=breachTime_s, NetworkRuleName=modelName_s, NetworkRuleNumber=pid_d, ThreatId=threatID_d, ThreatCategory=dtProduct_s, SrcIpAddr=SourceIP, SrcHostname=hostname_s, SrcMacAddr=sourceMac_s, SrcPortNumber=sourcePort_s, DstIpAddr=destIP_s, DstPortNumber=destPort_s, DstHostname=destHost_s, DstMacAddr=destMac_s, DtCompliance=compliance_b, DtClientSensor=cSensor_b, DtDescription=description_s, DtAntigena=antigena_b, DtDeviceID=deviceId_d, DtSubnetID=sid_d, DtTags=tags_s, DtMitreTechniques=mitreTechniques_s, DtMessage=Message, DtUUID=uuid_g, DtBreachURL=breachUrl_s, DtSrcTypeLabel=typeLabel_s, DtTriggeredComponents=triggeredComponents_s, DtDetails=details_s, DtLongitude=longitude_d, DtLatitude=latitude_d, DtCategory=Category

Stage 4: `extend`

| extend EventCount=1, EventType="NetworkSession", EventSchema="NetworkSession", EventSchemaVersion="0.2.2", EventResult="Success", DvcAction = "Allow", EventVendor = "Darktrace", EventProduct = "Darktrace DETECT", EventEndTime=EventStartTime, ThreatName=NetworkRuleName, ThreatRiskLevel=EventSeverity

Stage 5: `extend`

| extend DtSentinelCategory = case(DtCategory == "Suspicious", "Medium", 
                                  DtCategory == "Critical", "High",
                                  "Informational")

DtSentinelCategory =

ifDtCategory == "Suspicious""Medium"

elifDtCategory == "Critical""High"

else"Informational"

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`dtProduct_s`	eq	`Policy Breach` transforms: `cased`

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

Field	Source
`DstHostname`	`project-rename`
`DstIpAddr`	`project-rename`
`DstMacAddr`	`project-rename`
`DstPortNumber`	`project-rename`
`DtAntigena`	`project-rename`
`DtBreachURL`	`project-rename`
`DtCategory`	`project-rename`
`DtClientSensor`	`project-rename`
`DtCompliance`	`project-rename`
`DtDescription`	`project-rename`
`DtDetails`	`project-rename`
`DtDeviceID`	`project-rename`
`DtLatitude`	`project-rename`
`DtLongitude`	`project-rename`
`DtMessage`	`project-rename`
`DtMitreTechniques`	`project-rename`
`DtSrcTypeLabel`	`project-rename`
`DtSubnetID`	`project-rename`
`DtTags`	`project-rename`
`DtTriggeredComponents`	`project-rename`
`DtUUID`	`project-rename`
`EventSeverity`	`project-rename`
`EventStartTime`	`project-rename`
`NetworkRuleName`	`project-rename`
`NetworkRuleNumber`	`project-rename`
`SrcHostname`	`project-rename`
`SrcIpAddr`	`project-rename`
`SrcMacAddr`	`project-rename`
`SrcPortNumber`	`project-rename`
`ThreatCategory`	`project-rename`
`ThreatId`	`project-rename`
`DvcAction`	`extend`
`EventCount`	`extend`
`EventEndTime`	`extend`
`EventProduct`	`extend`
`EventResult`	`extend`
`EventSchema`	`extend`
`EventSchemaVersion`	`extend`
`EventType`	`extend`
`EventVendor`	`extend`
`ThreatName`	`extend`
`ThreatRiskLevel`	`extend`
`DtSentinelCategory`	`extend`

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`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)

Darktrace Model Breach

Rule body kusto

Stages and Predicates

Stage 1: `source`

Stage 2: `where`

Stage 3: `project-rename`

Stage 4: `extend`

Stage 5: `extend`

Indicators

Output fields

Keyboard shortcuts

Search operators

Darktrace Model Breach

Rule body kusto

Stages and Predicates

Stage 1: source

Stage 2: where

Stage 3: project-rename

Stage 4: extend

Stage 5: extend

Indicators

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `project-rename`

Stage 4: `extend`

Stage 5: `extend`