Detection rules › Kusto

blacklens Insights

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: high
Group by: id
Source: github.com/Azure/Azure-Sentinel

'Creates incidents from blacklens.io Attack Surface Management alerts ingested into the blacklens_CL table. Alert severity is mapped dynamically from the source data.'

MITRE ATT&CK coverage

Tactic	Techniques
Reconnaissance	`T1595` Active Scanning
Resource Development	`T1583` Acquire Infrastructure
Initial Access	`T1190` Exploit Public-Facing Application
Stealth	`T1562` Impair Defenses
Credential Access	`T1110` Brute Force
Collection	`T1005` Data from Local System
Command & Control	`T1071` Application Layer Protocol
Exfiltration	`T1041` Exfiltration Over C2 Channel

Rule body kusto

id: e261b70a-3005-4a1b-a7a2-2c8147fafed7
name: blacklens Insights
description: |
  'Creates incidents from blacklens.io Attack Surface Management alerts ingested into the blacklens_CL table. Alert severity is mapped dynamically from the source data.'
severity: High
status: Available
tactics:
  - Reconnaissance
  - ResourceDevelopment
  - InitialAccess
  - CredentialAccess
  - Collection
  - Exfiltration
  - DefenseEvasion
  - CommandAndControl
relevantTechniques:
  - T1595
  - T1583
  - T1190
  - T1110
  - T1005
  - T1041
  - T1562
  - T1071
requiredDataConnectors:
  - connectorId: blacklens_io
    dataTypes:
      - blacklens_CL
kind: NRT
query: |
  blacklens_CL
  | summarize arg_max(TimeGenerated, *) by id
  | extend AlertSeverity = case(
      tolower(severity) == "critical", "High",
      tolower(severity) == "high", "High",
      tolower(severity) == "medium", "Medium",
      tolower(severity) == "low", "Low",
      "Informational"
  )
suppressionDuration: PT1H
suppressionEnabled: false
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDisplayNameFormat: "{{alert_title}}"
  alertDescriptionFormat: "{{message}}"
  alertSeverityColumnName: AlertSeverity
entityMappings:
  - entityType: URL
    fieldMappings:
      - identifier: Url
        columnName: link
version: 1.0.0

Stages and Predicates

Stage 1: `source`

blacklens_CL

Stage 2: `summarize`

| summarize arg_max(TimeGenerated, *) by id

Stage 3: `extend`

| extend AlertSeverity = case(
    tolower(severity) == "critical", "High",
    tolower(severity) == "high", "High",
    tolower(severity) == "medium", "Medium",
    tolower(severity) == "low", "Low",
    "Informational"
)

AlertSeverity =

ifseverity == "critical""High"

elifseverity == "high""High"

elifseverity == "medium""Medium"

elifseverity == "low""Low"

else"Informational"

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
`id`	`summarize`
`AlertSeverity`	`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)

blacklens Insights

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Stage 1: `source`

Stage 2: `summarize`

Stage 3: `extend`

Output fields

Keyboard shortcuts

Search operators

blacklens Insights

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Stage 1: source

Stage 2: summarize

Stage 3: extend

Output fields

Stage 1: `source`

Stage 2: `summarize`

Stage 3: `extend`