Detection rules › Kusto

Field Effect MDR Alert: ARO Alert

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.

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

Creates an incident for each Field Effect MDR ARO alert ingested into the workspace.

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059` Command and Scripting Interpreter
Stealth	`T1562` Impair Defenses

Rule body kusto

id: 6d2d6b3f-7d7b-4d4a-9b2b-9f7f3b8c2a11
name: "Field Effect MDR Alert: ARO Alert"
description: "Creates an incident for each Field Effect MDR ARO alert ingested into the workspace."
severity: Medium
status: Available
tactics:
  - Execution
  - DefenseEvasion
relevantTechniques:
  - T1059
  - T1562
requiredDataConnectors:
  - connectorId: FieldEffectCCF
    dataTypes:
      - FieldEffectAROAlerts_CL
queryFrequency: 5m
queryPeriod: 5m
triggerOperator: gt
triggerThreshold: 0
suppressionDuration: 1h
suppressionEnabled: false

query: |
  FieldEffectAROAlerts_CL
  | where TimeGenerated >= ago(5m)
  | project
      TimeGenerated,
      ARO = ID,
      TITLE = Title,
      DETAILS = DetailsMarkdown,
      URL = PortalUrl,
      SEVERITY = Severity,
      Hostname,
      IPAddress,
      LastUser,
      PRODUCT_NAME = "Field Effect MDR"
eventGroupingSettings:
  aggregationKind: SingleAlert

incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: 5h
    matchingMethod: AllEntities

alertDetailsOverride:
  alertDisplayNameFormat: "Field Effect MDR Alert: ARO-{{ARO}}: {{TITLE}}"
  alertDescriptionFormat: "{{DETAILS}}\n\nFor full information, visit: {{URL}}\n"
  alertSeverityColumnName: SEVERITY
  alertDynamicProperties:
    - alertProperty: ProductName
      value: PRODUCT_NAME

entityMappings:
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: IPAddress
  - entityType: Account
    fieldMappings:
      - identifier: Name
        columnName: LastUser
  - entityType: Host
    fieldMappings:
      - identifier: HostName
        columnName: Hostname

version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: `source`

FieldEffectAROAlerts_CL

Stage 2: `where`

| where TimeGenerated >= ago(5m)

Stage 3: `project`

| project
    TimeGenerated,
    ARO = ID,
    TITLE = Title,
    DETAILS = DetailsMarkdown,
    URL = PortalUrl,
    SEVERITY = Severity,
    Hostname,
    IPAddress,
    LastUser,
    PRODUCT_NAME = "Field Effect MDR"

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
`ARO`	`project`
`DETAILS`	`project`
`Hostname`	`project`
`IPAddress`	`project`
`LastUser`	`project`
`PRODUCT_NAME`	`project`
`SEVERITY`	`project`
`TITLE`	`project`
`TimeGenerated`	`project`
`URL`	`project`

`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)

Field Effect MDR Alert: ARO Alert

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Stage 1: `source`

Stage 2: `where`

Stage 3: `project`

Output fields

Keyboard shortcuts

Search operators

Field Effect MDR Alert: ARO Alert

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Stage 1: source

Stage 2: where

Stage 3: project

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `project`