Red Sift - MFA disabled on account

Status: available
Severity: high
Time window: 1h
Source: github.com/Azure/Azure-Sentinel

This query searches for authentication events where MFA has been disabled on an account, which may indicate account takeover activity, weakened account protections, or unauthorized administrative changes.

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1556` Modify Authentication Process
Defense Impairment	`T1556` Modify Authentication Process
Credential Access	`T1556` Modify Authentication Process

Rule body kusto

id: 16f26d2c-6296-490b-af4f-b30bcf1c4461
name: Red Sift - MFA disabled on account
description: |
  This query searches for authentication events where MFA has been disabled on an account, which may indicate account takeover activity, weakened account protections, or unauthorized administrative changes.
severity: High
status: Available
requiredDataConnectors:
  - connectorId: RedSiftPush
    dataTypes:
      - RedSiftAuth_CL
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - DefenseEvasion
relevantTechniques:
  - T1556
query: |
  RedSiftAuth_CL
  | extend
      ActivityName = tostring(column_ifexists("ActivityName", "")),
      UserEmail = tostring(column_ifexists("UserEmail", "")),
      ActorUserEmail = tostring(column_ifexists("ActorUserEmail", "")),
      SrcIp = tostring(column_ifexists("SrcIp", "")),
      HttpUserAgent = tostring(column_ifexists("HttpUserAgent", "")),
      ServiceName = tostring(column_ifexists("ServiceName", "")),
      Severity = tostring(column_ifexists("Severity", "")),
      UserUid = tostring(column_ifexists("UserUid", "")),
      ActorUserUid = tostring(column_ifexists("ActorUserUid", ""))
  | where ActivityName =~ "MFA Disabled"
  | where isnotempty(UserEmail) or isnotempty(ActorUserEmail)
  | extend TargetAccount = iff(isnotempty(UserEmail), UserEmail, ActorUserEmail)
  | project
      TimeGenerated,
      TargetAccount,
      UserEmail,
      ActorUserEmail,
      SrcIp,
      HttpUserAgent,
      ServiceName,
      ActivityName,
      Severity,
      UserUid,
      ActorUserUid
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: FullName
        columnName: TargetAccount
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: SrcIp
customDetails:
  ActorUserEmail: ActorUserEmail
  UserAgent: HttpUserAgent
  ServiceName: ServiceName
  ActivityName: ActivityName
alertDetailsOverride:
  alertDisplayNameFormat: "RedSift - MFA Disabled for {{TargetAccount}}"
  alertDescriptionFormat: "MFA was disabled for {{TargetAccount}}. Actor: {{ActorUserEmail}}. Source IP: {{SrcIp}}."
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    lookbackDuration: P1D
    matchingMethod: Selected
    groupByEntities:
      - Account
eventGroupingSettings:
  aggregationKind: AlertPerResult
suppressionEnabled: false
suppressionDuration: PT1H
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: `source`

RedSiftAuth_CL

Stage 2: `extend`

| extend
    ActivityName = tostring(column_ifexists("ActivityName", "")),
    UserEmail = tostring(column_ifexists("UserEmail", "")),
    ActorUserEmail = tostring(column_ifexists("ActorUserEmail", "")),
    SrcIp = tostring(column_ifexists("SrcIp", "")),
    HttpUserAgent = tostring(column_ifexists("HttpUserAgent", "")),
    ServiceName = tostring(column_ifexists("ServiceName", "")),
    Severity = tostring(column_ifexists("Severity", "")),
    UserUid = tostring(column_ifexists("UserUid", "")),
    ActorUserUid = tostring(column_ifexists("ActorUserUid", ""))

Stage 3: `where`

| where ActivityName =~ "MFA Disabled"

Stage 4: `where`

| where isnotempty(UserEmail) or isnotempty(ActorUserEmail)

Stage 5: `extend`

| extend TargetAccount = iff(isnotempty(UserEmail), UserEmail, ActorUserEmail)

TargetAccount =

ifisnotempty(UserEmail)UserEmail

elseActorUserEmail

Stage 6: `project`

| project
    TimeGenerated,
    TargetAccount,
    UserEmail,
    ActorUserEmail,
    SrcIp,
    HttpUserAgent,
    ServiceName,
    ActivityName,
    Severity,
    UserUid,
    ActorUserUid

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
`ActivityName`	eq	`MFA Disabled`
`ActorUserEmail`	is_not_null	(no value, null check)
`UserEmail`	is_not_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
`ActivityName`	`project`
`ActorUserEmail`	`project`
`ActorUserUid`	`project`
`HttpUserAgent`	`project`
`ServiceName`	`project`
`Severity`	`project`
`SrcIp`	`project`
`TargetAccount`	`project`
`TimeGenerated`	`project`
`UserEmail`	`project`
`UserUid`	`project`

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`f`	Follow link (`Shift` = new tab)
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`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)

Red Sift - MFA disabled on account

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Stage 1: `source`

Stage 2: `extend`

Stage 3: `where`

Stage 4: `where`

Stage 5: `extend`

Stage 6: `project`

Indicators

Output fields

Keyboard shortcuts

Search operators

Red Sift - MFA disabled on account

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Stage 1: source

Stage 2: extend

Stage 3: where

Stage 4: where

Stage 5: extend

Stage 6: project

Indicators

Output fields

Stage 1: `source`

Stage 2: `extend`

Stage 3: `where`

Stage 4: `where`

Stage 5: `extend`

Stage 6: `project`