TI map IP entity to Workday(ASimAuditEventLogs)

Severity: medium
Time window: 14d
Group by: DvcIpAddr, Id, ObservableValue, TI_ipEntity
Source: github.com/Azure/Azure-Sentinel

Detects a match in Workday activity from any IP Indicator of Compromise (IOC) provided by Threat Intelligence (TI).

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1071` Application Layer Protocol

Rule body kusto

id: 92e8e945-6e99-4e4b-bef8-468b4c19fc3a
name: TI map IP entity to Workday(ASimAuditEventLogs)
description: |
  Detects a match in Workday activity from any IP Indicator of Compromise (IOC) provided by Threat Intelligence (TI).
severity: Medium
requiredDataConnectors:
  - connectorId: ThreatIntelligence
    dataTypes:
      - ThreatIntelIndicators
  - connectorId: ThreatIntelligenceTaxii
    dataTypes:
      - ThreatIntelIndicators
  - connectorId: Workday
    dataTypes:
      - Workday
  - connectorId: MicrosoftDefenderThreatIntelligence
    dataTypes:
      - ThreatIntelIndicators
queryFrequency: 1h
queryPeriod: 14d
triggerOperator: gt
triggerThreshold: 0
tactics:
  - CommandAndControl
relevantTechniques:
  - T1071
query: |
  let dtLookBack = 1h; // Define the lookback period for audit events
  let ioc_lookBack = 14d; // Define the lookback period for threat intelligence indicators
  ThreatIntelIndicators 
  | where TimeGenerated >= ago(ioc_lookBack) // Filter threat intelligence indicators within the lookback period
  //extract key part of kv pair
       | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
       | where IndicatorType in ("ipv4-addr", "ipv6-addr", "network-traffic")
       | extend NetworkSourceIP = toupper(ObservableValue)
       | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
       | where isnotempty(NetworkSourceIP)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue // Get the latest indicator time for each IndicatorId
    | extend TI_ipEntity = coalesce(NetworkSourceIP, NetworkSourceIP, NetworkSourceIP, NetworkSourceIP) // Combine IP fields into a single entity
    | where IsActive and (ValidUntil > now() or isempty(ValidUntil)) // Filter for active indicators that have not expired
    | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
    | join kind=inner (
        ASimAuditEventLogs
        | where EventVendor == "Workday" // Filter for Workday events
        | where TimeGenerated >= ago(dtLookBack) // Filter events within the lookback period
        | where isnotempty(DvcIpAddr) // Filter for events with a device IP address
        | extend WD_TimeGenerated = EventStartTime // Rename the event start time column
        | project WD_TimeGenerated, ActorUsername, DvcIpAddr, Operation, Object // Select relevant columns
        )
        on $left.TI_ipEntity == $right.DvcIpAddr // Join on the IP entity
        | extend Description = tostring(parse_json(Data).description)
        | extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))
    | project
        LatestIndicatorTime,
        Description,
        ActivityGroupNames,
        Id,
        ValidUntil,
        Confidence,
        WD_TimeGenerated,
        ActorUsername,
        DvcIpAddr,
        Operation,
        Object // Select relevant columns after the join
    | extend
        timestamp = WD_TimeGenerated,
        Name = tostring(split(ActorUsername, '@', 0)),
        UPNSuffix = tostring(split(ActorUsername, '@', 1)) // Add additional fields for timestamp, name, and UPN suffix   
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: FullName
        columnName: ActorUsername
      - identifier: Name
        columnName: Name
      - identifier: UPNSuffix
        columnName: UPNSuffix
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: DvcIpAddr
version: 1.0.3
kind: Scheduled

Stages and Predicates

Parameters

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

Stage 1: `source`

ThreatIntelIndicators

Stage 2: `where`

| where TimeGenerated >= ago(ioc_lookBack)

Stage 3: `extend`

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

Stage 4: `where`

| where IndicatorType in ("ipv4-addr", "ipv6-addr", "network-traffic")

Stage 5: `extend`

| extend NetworkSourceIP = toupper(ObservableValue)

Stage 6: `extend`

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

Stage 7: `where`

| where isnotempty(NetworkSourceIP)

Stage 8: `summarize`

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

Stage 9: `extend`

| extend TI_ipEntity = coalesce(NetworkSourceIP, NetworkSourceIP, NetworkSourceIP, NetworkSourceIP)

Stage 10: `where`

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

Stage 11: `project-reorder`

| project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity

Stage 12: `join`

| join kind=inner (
      ASimAuditEventLogs
      | where EventVendor == "Workday"
      | where TimeGenerated >= ago(dtLookBack)
      | where isnotempty(DvcIpAddr)
      | extend WD_TimeGenerated = EventStartTime
      | project WD_TimeGenerated, ActorUsername, DvcIpAddr, Operation, Object
      )
      on $left.TI_ipEntity == $right.DvcIpAddr

Stage 13: `extend`

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

Stage 14: `extend`

| extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))

Stage 15: `project`

| project
      LatestIndicatorTime,
      Description,
      ActivityGroupNames,
      Id,
      ValidUntil,
      Confidence,
      WD_TimeGenerated,
      ActorUsername,
      DvcIpAddr,
      Operation,
      Object

Stage 16: `extend`

| extend
      timestamp = WD_TimeGenerated,
      Name = tostring(split(ActorUsername, '@', 0)),
      UPNSuffix = tostring(split(ActorUsername, '@', 1))

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
`DvcIpAddr`	is_not_null	(no value, null check)
`EventVendor`	eq	`Workday` transforms: `cased`
`IndicatorType`	in	`ipv4-addr` transforms: `cased` `ipv6-addr` transforms: `cased` `network-traffic` transforms: `cased`
`NetworkSourceIP`	is_not_null	(no value, null check)
`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
`ActivityGroupNames`	`project`
`ActorUsername`	`project`
`Confidence`	`project`
`Description`	`project`
`DvcIpAddr`	`project`
`Id`	`project`
`LatestIndicatorTime`	`project`
`Object`	`project`
`Operation`	`project`
`ValidUntil`	`project`
`WD_TimeGenerated`	`project`
`Name`	`extend`
`UPNSuffix`	`extend`
`timestamp`	`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)

TI map IP entity to Workday(ASimAuditEventLogs)

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Parameters

Stage 1: `source`

Stage 2: `where`

Stage 3: `extend`

Stage 4: `where`

Stage 5: `extend`

Stage 6: `extend`

Stage 7: `where`

Stage 8: `summarize`

Stage 9: `extend`

Stage 10: `where`

Stage 11: `project-reorder`

Stage 12: `join`

Stage 13: `extend`

Stage 14: `extend`

Stage 15: `project`

Stage 16: `extend`

Indicators

Output fields

Keyboard shortcuts

Search operators

TI map IP entity to Workday(ASimAuditEventLogs)

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Parameters

Stage 1: source

Stage 2: where

Stage 3: extend

Stage 4: where

Stage 5: extend

Stage 6: extend

Stage 7: where

Stage 8: summarize

Stage 9: extend

Stage 10: where

Stage 11: project-reorder

Stage 12: join

Stage 13: extend

Stage 14: extend

Stage 15: project

Stage 16: extend

Indicators

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `extend`

Stage 4: `where`

Stage 5: `extend`

Stage 6: `extend`

Stage 7: `where`

Stage 8: `summarize`

Stage 9: `extend`

Stage 10: `where`

Stage 11: `project-reorder`

Stage 12: `join`

Stage 13: `extend`

Stage 14: `extend`

Stage 15: `project`

Stage 16: `extend`