GSA - TI Domain Entity

Status: available
Severity: medium
Time window: 14d
Group by: DestinationFqdn, Domain, DomainName, Id, ObservableValue
Source: github.com/Azure/Azure-Sentinel

This query identifies Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in GSA NetworkAccessTraffic.

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1071` Application Layer Protocol

Rule body kusto

id: 4ef07345-5d89-4f5b-9c64-a180d81a6176
name: GSA - TI Domain Entity
description: |
  This query identifies Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in GSA NetworkAccessTraffic.
severity: Medium
status: Available
requiredDataConnectors:
  - connectorId: AzureActiveDirectory
    dataTypes:
      - NetworkAccessTrafficLogs
queryFrequency: 1h
queryPeriod: 14d
triggerOperator: gt
triggerThreshold: 0
tactics:
  - CommandAndControl
relevantTechniques:
  - T1071
query: |
  let dt_lookBack = 1h;
  let ioc_lookBack = 14d;
  let NetworkAccessTraff_ = NetworkAccessTraffic
  | where TimeGenerated >= ago(dt_lookBack)
  | where TrafficType == "internet"
  | where isnotempty(DestinationFqdn)
  | extend Domain = extract(@'([^.]+\.[^.]+)$', 1, DestinationFqdn)
  | project-rename GSANetworkAccessTraffic_TimeGenerated = TimeGenerated;
  let NetworkAccessTraffiDomains =
      NetworkAccessTraff_
      | distinct Domain;
  ThreatIntelIndicators
    | extend IndicatorType = replace(@'\[|\]|"""', "", tostring(split(ObservableKey, ":", 0)))
    | where IndicatorType == "domain-name"
    | extend DomainName = tolower(ObservableValue)
    | where TimeGenerated >= ago(ioc_lookBack)
    | extend IndicatorId = tostring(split(Id, "--")[2])
    | where DomainName in (NetworkAccessTraffiDomains)
    | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
    | where IsActive and (ValidUntil > now() or isempty(ValidUntil))
    | extend Description = tostring(parse_json(Data).description)
    | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
    | where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;"
    | project-reorder *, IsActive, Tags, TrafficLightProtocolLevel, DomainName, Type
    | join kind=innerunique (NetworkAccessTraff_) on $left.DomainName == $right.Domain
    | extend GSAThreatType = ThreatType
    | summarize GSANetworkAccessTraffic_TimeGenerated = arg_max(GSANetworkAccessTraffic_TimeGenerated, *) by Id, DestinationFqdn
    | project-reorder *,
      Tags,
      TrafficLightProtocolLevel,
      Type,
      DomainName,
      UserPrincipalName,
      UserId,
      DeviceId,
      InitiatingProcessName,
      GSAThreatType,
      DestinationUrl,
      DestinationPort,
      SourceIp,
      SourcePort,
      HttpUserAgent
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: Name
        columnName: UserPrincipalName
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: SourceIp
  - entityType: URL
    fieldMappings:
      - identifier: Url
        columnName: DestinationFqdn
  - entityType: Process
    fieldMappings:
      - identifier: CommandLine
        columnName: InitiatingProcessName
kind: Scheduled

Stages and Predicates

Parameters

let dt_lookBack = 1h;
let ioc_lookBack = 14d;

Let binding: `NetworkAccessTraff_`

let NetworkAccessTraff_ = NetworkAccessTraffic
| where TimeGenerated >= ago(dt_lookBack)
| where TrafficType == "internet"
| where isnotempty(DestinationFqdn)
| extend Domain = extract(@'([^.]+\.[^.]+)$', 1, DestinationFqdn)
| project-rename GSANetworkAccessTraffic_TimeGenerated = TimeGenerated;

Derived from dt_lookBack.

Let binding: `NetworkAccessTraffiDomains`

let NetworkAccessTraffiDomains = NetworkAccessTraff_
    | distinct Domain;

Derived from NetworkAccessTraff_.

Stage 1: `source`

ThreatIntelIndicators

Stage 2: `extend`

| extend IndicatorType = replace(@'\[|\]|"""', "", tostring(split(ObservableKey, ":", 0)))

Stage 3: `where`

| where IndicatorType == "domain-name"

Stage 4: `extend`

| extend DomainName = tolower(ObservableValue)

Stage 5: `where`

| where TimeGenerated >= ago(ioc_lookBack)

Stage 6: `extend`

| extend IndicatorId = tostring(split(Id, "--")[2])

Stage 7: `where`

| where DomainName in (NetworkAccessTraffiDomains)

References NetworkAccessTraffiDomains (defined above).

Stage 8: `summarize`

| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue

Stage 9: `where`

| where IsActive and (ValidUntil > now() or isempty(ValidUntil))

Stage 10: `extend`

| extend Description = tostring(parse_json(Data).description)

Stage 11: `extend`

| extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)

Stage 12: `where`

| where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;"

Stage 13: `project-reorder`

| project-reorder *, IsActive, Tags, TrafficLightProtocolLevel, DomainName, Type

Stage 14: `join`

| join kind=innerunique (NetworkAccessTraff_) on $left.DomainName == $right.Domain

Stage 15: `extend`

| extend GSAThreatType = ThreatType

Stage 16: `summarize`

| summarize GSANetworkAccessTraffic_TimeGenerated = arg_max(GSANetworkAccessTraffic_TimeGenerated, *) by Id, DestinationFqdn

Stage 17: `project-reorder`

| project-reorder *,
    Tags,
    TrafficLightProtocolLevel,
    Type,
    DomainName,
    UserPrincipalName,
    UserId,
    DeviceId,
    InitiatingProcessName,
    GSAThreatType,
    DestinationUrl,
    DestinationPort,
    SourceIp,
    SourcePort,
    HttpUserAgent

Exclusions

Top-level NOT(...) conjuncts: predicates this rule actively suppresses.

Field	Kind	Excluded values
`Description`	contains	`State: falsepos;`
`Description`	contains	`State: inactive;`

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
`DestinationFqdn`	is_not_null	(no value, null check)
`DomainName`	in	`NetworkAccessTraffiDomains` transforms: `cased`
`IndicatorType`	eq	`domain-name` transforms: `cased`
`TrafficType`	eq	`internet` transforms: `cased`
`ValidUntil`	is_null	(no value, null check)

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
`DestinationFqdn`	`summarize`
`GSANetworkAccessTraffic_TimeGenerated`	`summarize`
`Id`	`summarize`

`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)

GSA - TI Domain Entity

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Parameters

Let binding: `NetworkAccessTraff_`

Let binding: `NetworkAccessTraffiDomains`

Stage 1: `source`

Stage 2: `extend`

Stage 3: `where`

Stage 4: `extend`

Stage 5: `where`

Stage 6: `extend`

Stage 7: `where`

Stage 8: `summarize`

Stage 9: `where`

Stage 10: `extend`

Stage 11: `extend`

Stage 12: `where`

Stage 13: `project-reorder`

Stage 14: `join`

Stage 15: `extend`

Stage 16: `summarize`

Stage 17: `project-reorder`

Exclusions

Indicators

Output fields

Keyboard shortcuts

Search operators

GSA - TI Domain Entity

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Parameters

Let binding: NetworkAccessTraff_

Let binding: NetworkAccessTraffiDomains

Stage 1: source

Stage 2: extend

Stage 3: where

Stage 4: extend

Stage 5: where

Stage 6: extend

Stage 7: where

Stage 8: summarize

Stage 9: where

Stage 10: extend

Stage 11: extend

Stage 12: where

Stage 13: project-reorder

Stage 14: join

Stage 15: extend

Stage 16: summarize

Stage 17: project-reorder

Exclusions

Indicators

Output fields

Let binding: `NetworkAccessTraff_`

Let binding: `NetworkAccessTraffiDomains`

Stage 1: `source`

Stage 2: `extend`

Stage 3: `where`

Stage 4: `extend`

Stage 5: `where`

Stage 6: `extend`

Stage 7: `where`

Stage 8: `summarize`

Stage 9: `where`

Stage 10: `extend`

Stage 11: `extend`

Stage 12: `where`

Stage 13: `project-reorder`

Stage 14: `join`

Stage 15: `extend`

Stage 16: `summarize`

Stage 17: `project-reorder`