Okta App Refresh Access Token Reuse

Severity: medium
Log types: Okta.SystemLog
Reference: https://developer.okta.com/docs/guides/refresh-tokens/main/#refresh-token-reuse-detection
Source: github.com/panther-labs/panther-analysis

When a client wants to renew an access token, it sends the refresh token with the access token request to the /token Okta endpoint. Okta validates the incoming refresh token, issues a new set of tokens and invalidates the refresh token that was passed with the initial request. This detection alerts when a previously used refresh token is used again with the token request

Rule body yaml

AnalysisType: rule
Description: |-
  When a client wants to renew an access token, it sends the refresh token with the access token request to the /token Okta endpoint.
  Okta validates the incoming refresh token, issues a new set of tokens and invalidates the refresh token that was passed with the initial request.
  This detection alerts when a previously used refresh token is used again with the token request
Reference: https://developer.okta.com/docs/guides/refresh-tokens/main/#refresh-token-reuse-detection
DisplayName: "Okta App Refresh Access Token Reuse"
Enabled: true
Filename: okta_app_refresh_access_token_reuse.py
Runbook: Determine if the clientip is anomalous. Revoke tokens if deemed suspicious.
Severity: Medium
Tests:
  - ExpectedResult: false
    Log:
      actor:
        alternateId: "123456"
        displayName: Okta User
        id: okta.1234.
        type: PublicClientApp
      authenticationcontext:
        authenticationStep: 0
        externalSessionId: "123456789"
      client:
        device: Computer
        geographicalContext:
          city: Queens
          country: United States
          geolocation:
            lat: 40
            lon: -70
          postalCode: "11375"
          state: New York
        id: okta.1234
        ipAddress: 1.2.3.4
        userAgent:
          browser: SAFARI
          os: Mac OS X
          rawUserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Safari/605.1.15
        zone: "null"
      debugcontext:
        debugData:
          authnRequestId: yyyy-abc-1111
          behaviors: "{New Geo-Location=NEGATIVE, New Device=NEGATIVE, New IP=NEGATIVE, New State=NEGATIVE, New Country=NEGATIVE, Velocity=NEGATIVE, New City=NEGATIVE}"
          dtHash: 11aabbccc
          grantType: authorization_code
          grantedScopes: openid, profile, email, okta.users.read.self
          redirectUri: https://org.okta.com/enduser/callback
          requestId: ABCDEFG
          requestUri: /login/token/redirect
          requestedScopes: openid, profile, email, okta.users.read.self
          responseMode: query
          responseType: code
          risk: "{level=LOW}"
          state: SDFJDSLFS1234
          threatSuspected: "false"
          url: /login/token/redirect?stateToken=02.id.ASDDFJLKF
          userId: 00abc124
      displaymessage: OIDC authorization code request
      eventtype: app.oauth2.authorize.code
      legacyeventtype: app.oauth2.authorize.code_success
      outcome:
        result: SUCCESS
      published: "2022-12-13 15:22:58.759"
      request:
        ipChain:
          - geographicalContext:
              city: Queens
              country: United States
              geolocation:
                lat: 40
                lon: -70
              postalCode: "11375"
              state: New York
            ip: 1.2.3.4
            version: V4
      securitycontext:
        asNumber: 701
        asOrg: verizon
        domain: verizon.net
        isProxy: false
        isp: verizon
      severity: INFO
      target:
        - id: abcd123
          type: User
        - displayName: Authorization Code
          id: SDFSFJL
          type: code
      transaction:
        detail: {}
        id: SDKFLSKLFJSLF
        type: WEB
      uuid: abc-1234-aaa
      version: "0"
    Name: Non-event
  - ExpectedResult: true
    Log:
      actor:
        alternateId: "123456"
        displayName: Okta User
        id: okta.1234.
        type: PublicClientApp
      authenticationcontext:
        authenticationStep: 0
        externalSessionId: "123456789"
      client:
        device: Computer
        geographicalContext:
          city: Queens
          country: United States
          geolocation:
            lat: 40
            lon: -70
          postalCode: "11375"
          state: New York
        id: okta.1234
        ipAddress: 1.2.3.4
        userAgent:
          browser: SAFARI
          os: Mac OS X
          rawUserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Safari/605.1.15
        zone: "null"
      debugcontext:
        debugData:
          authnRequestId: yyyy-abc-1111
          behaviors: "{New Geo-Location=NEGATIVE, New Device=NEGATIVE, New IP=NEGATIVE, New State=NEGATIVE, New Country=NEGATIVE, Velocity=NEGATIVE, New City=NEGATIVE}"
          dtHash: 11aabbccc
          grantType: authorization_code
          grantedScopes: openid, profile, email, okta.users.read.self
          redirectUri: https://org.okta.com/enduser/callback
          requestId: ABCDEFG
          requestUri: /login/token/redirect
          requestedScopes: openid, profile, email, okta.users.read.self
          responseMode: query
          responseType: code
          risk: "{level=LOW}"
          state: SDFJDSLFS1234
          threatSuspected: "false"
          url: /login/token/redirect?stateToken=02.id.ASDDFJLKF
          userId: 00abc124
      displaymessage: Token Reuse
      eventtype: app.oauth2.token.detect_reuse
      legacyeventtype: app.oauth2.token.detect_reuse
      outcome:
        result: SUCCESS
      published: "2022-12-13 15:22:58.759"
      request:
        ipChain:
          - geographicalContext:
              city: Queens
              country: United States
              geolocation:
                lat: 40
                lon: -70
              postalCode: "11375"
              state: New York
            ip: 1.2.3.4
            version: V4
      securitycontext:
        asNumber: 701
        asOrg: verizon
        domain: verizon.net
        isProxy: false
        isp: verizon
      severity: INFO
      target:
        - id: abcd123
          type: User
        - displayName: Authorization Code
          id: SDFSFJL
          type: code
      transaction:
        detail: {}
        id: SDKFLSKLFJSLF
        type: WEB
      uuid: abc-1234-aaa
      version: "0"
    Name: Reuse Event
DedupPeriodMinutes: 60
LogTypes:
  - Okta.SystemLog
RuleID: "Okta.Refresh.Access.Token.Reuse"
Threshold: 1

Detection logic

Condition

eventtype in ["app.oauth2.as.token.detect_reuse", "app.oauth2.token.detect_reuse"]

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
`event_type`	`eventtype`
`severity`
`actor`
`client`
`request`
`outcome`
`target`
`debug_context`	`debugcontext`
`authentication_context`	`authenticationcontext`
`security_context`	`securitycontext`
`ips`	`p_any_ip_addresses`
`ipAddress`	`client.ipAddress`
`displayName`	`actor.displayName`

`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)

Okta App Refresh Access Token Reuse

Rule body yaml

Detection logic

Condition

Output fields

Keyboard shortcuts

Search operators