Okta Potentially Stolen Session

Severity: high
Entities: domain_names, ip_addresses
Log types: Okta.SystemLog
Tags: Identity & Access Management, Okta
Reference: https://sec.okta.com/sessioncookietheft
Source: github.com/panther-labs/panther-analysis

This rule looks for the same session being used from two devices, indicating a compromised session token.

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1539` Steal Web Session Cookie

Rules detecting the same action

Other rules on this platform that filter on the same API call or operation.

Failed Logins from Unknown or Invalid User (Kusto)
First Occurrence of Okta User Session Started via Proxy (Elastic)
High-Risk Admin Activity (Kusto)
Multiple Okta Sessions Detected for a Single User (Elastic)
Multiple Okta User Authentication Events with Same Device Token Hash (Elastic)
New Device/Location sign-in along with critical operation (Kusto)
Okta AiTM Session Cookie Replay (Elastic)
Okta Login Signal (Panther)

Rule body yaml

AnalysisType: rule
Filename: okta_potentially_stolen_session.py
RuleID: Okta.PotentiallyStolenSession
DisplayName: Okta Potentially Stolen Session
Enabled: true
LogTypes:
  - Okta.SystemLog
Tags:
  - Identity & Access Management
  - Okta
Reports:
  MITRE ATT&CK:
    - TA0006:T1539
Severity: High
Description: This rule looks for the same session being used from two devices, indicating a compromised session token.
Runbook: Confirm the session is used on two devices, one of which is unknown. Lock the users Okta account and clear the users sessions in down stream apps.
Reference: https://sec.okta.com/sessioncookietheft
SummaryAttributes:
  - eventType
  - severity
  - p_any_ip_addresses
  - p_any_domain_names
Tests:
  - Name: Same device and OS
    ExpectedResult: false
    Mocks:
      - objectName: get_string_set
        returnValue: >
          [
              "263297",
              "1.2.3.4",
              "user_agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36",
              "CHROME",
              "Linux"
          ]
    Log:
      {
        "actor":
          {
            "alternateId": "admin",
            "displayName": "unknown",
            "id": "unknown",
            "type": "User",
          },
        "authenticationContext":
          { "authenticationStep": 0, "externalSessionId": "123456789" },
        "client":
          {
            "device": "Computer",
            "geographicalContext":
              {
                "city": "Dois Irmaos",
                "country": "Brazil",
                "geolocation": { "lat": -29.6116, "lon": -51.0933 },
                "postalCode": "93950",
                "state": "Rio Grande do Sul",
              },
            "ipAddress": "1.2.3.4",
            "userAgent":
              {
                "browser": "CHROME",
                "os": "Linux",
                "rawUserAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36",
              },
            "zone": "null",
          },
        "debugContext":
          {
            "debugData":
              {
                "loginResult": "VERIFICATION_ERROR",
                "requestId": "redacted",
                "requestUri": "redacted",
                "threatSuspected": "false",
                "url": "redacted",
                "dtHash": "kzpx58a99d2oam082rlu588wgy1mb0zfi1e1l63f9cjx4uxc455k4t6xdiwbxian",
              },
          },
        "displayMessage": "User login to Okta",
        "eventType": "user.session.start",
        "legacyEventType": "core.user_auth.login_failed",
        "outcome": { "reason": "VERIFICATION_ERROR", "result": "FAILURE" },
        "p_any_domain_names": ["rnvtelecom.com.br"],
        "p_any_ip_addresses": ["redacted"],
        "p_event_time": "redacted",
        "p_log_type": "Okta.SystemLog",
        "p_parse_time": "redacted",
        "p_row_id": "redacted",
        "p_source_id": "redacted",
        "p_source_label": "Okta",
        "published": "redacted",
        "request":
          {
            "ipChain":
              [
                {
                  "geographicalContext":
                    {
                      "city": "Dois Irmaos",
                      "country": "Brazil",
                      "geolocation": { "lat": -29.6116, "lon": -51.0933 },
                      "postalCode": "93950",
                      "state": "Rio Grande do Sul",
                    },
                  "ip": "redacted",
                  "version": "V4",
                },
              ],
          },
        "securityContext":
          {
            "asNumber": 263297,
            "asOrg": "renovare telecom",
            "domain": "rnvtelecom.com.br",
            "isProxy": false,
            "isp": "renovare telecom",
          },
        "severity": "INFO",
        "transaction": { "detail": {}, "id": "redacted", "type": "WEB" },
        "uuid": "redacted",
        "version": "0",
      }
  - Name: Different device & ASN
    ExpectedResult: true
    Mocks:
      - objectName: get_string_set
        returnValue: >
          [
              "123456",
              "4.3.2.1",
              "user_agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36",
              "CHROME",
              "MacOS"
          ]
    Log:
      {
        "actor":
          {
            "alternateId": "admin",
            "displayName": "Bobert",
            "id": "unknown",
            "type": "User",
          },
        "authenticationContext":
          { "authenticationStep": 0, "externalSessionId": "123456789" },
        "client":
          {
            "device": "Computer",
            "geographicalContext":
              {
                "city": "Dois Irmaos",
                "country": "Brazil",
                "geolocation": { "lat": -29.6116, "lon": -51.0933 },
                "postalCode": "93950",
                "state": "Rio Grande do Sul",
              },
            "ipAddress": "1.2.3.4",
            "userAgent":
              {
                "browser": "CHROME",
                "os": "Linux",
                "rawUserAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36",
              },
            "zone": "null",
          },
        "debugContext":
          {
            "debugData":
              {
                "dtHash": "kzpx58a99d2oam082rlu588wgy1mb0zfi1e1l63f9cjx4uxc455k4t6xdiwbxian",
                "loginResult": "VERIFICATION_ERROR",
                "requestId": "redacted",
                "requestUri": "redacted",
                "threatSuspected": "false",
                "url": "redacted",
              },
          },
        "displayMessage": "User login to Okta",
        "eventType": "user.session.start",
        "legacyEventType": "core.user_auth.login_failed",
        "outcome": { "reason": "VERIFICATION_ERROR", "result": "FAILURE" },
        "p_any_domain_names": ["rnvtelecom.com.br"],
        "p_any_ip_addresses": ["redacted"],
        "p_event_time": "redacted",
        "p_log_type": "Okta.SystemLog",
        "p_parse_time": "redacted",
        "p_row_id": "redacted",
        "p_source_id": "redacted",
        "p_source_label": "Okta",
        "published": "redacted",
        "request":
          {
            "ipChain":
              [
                {
                  "geographicalContext":
                    {
                      "city": "Dois Irmaos",
                      "country": "Brazil",
                      "geolocation": { "lat": -29.6116, "lon": -51.0933 },
                      "postalCode": "93950",
                      "state": "Rio Grande do Sul",
                    },
                  "ip": "redacted",
                  "version": "V4",
                },
              ],
          },
        "securityContext":
          {
            "asNumber": 263297,
            "asOrg": "renovare telecom",
            "domain": "rnvtelecom.com.br",
            "isProxy": false,
            "isp": "renovare telecom",
          },
        "severity": "INFO",
        "transaction": { "detail": {}, "id": "redacted", "type": "WEB" },
        "uuid": "redacted",
        "version": "0",
      }
  - Name: Different ASN & same device
    ExpectedResult: false
    Mocks:
      - objectName: get_string_set
        returnValue: >
          [
              "654321",
              "1.2.3.4",
              "user_agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36",
              "CHROME",
              "Linux"
          ]
    Log:
      {
        "actor":
          {
            "alternateId": "admin",
            "displayName": "Bobert",
            "id": "unknown",
            "type": "User",
          },
        "authenticationContext":
          { "authenticationStep": 0, "externalSessionId": "123456789" },
        "client":
          {
            "device": "Computer",
            "geographicalContext":
              {
                "city": "Dois Irmaos",
                "country": "Brazil",
                "geolocation": { "lat": -29.6116, "lon": -51.0933 },
                "postalCode": "93950",
                "state": "Rio Grande do Sul",
              },
            "ipAddress": "1.2.3.4",
            "userAgent":
              {
                "browser": "CHROME",
                "os": "Linux",
                "rawUserAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36",
              },
            "zone": "null",
          },
        "debugContext":
          {
            "debugData":
              {
                "loginResult": "VERIFICATION_ERROR",
                "requestId": "redacted",
                "requestUri": "redacted",
                "threatSuspected": "false",
                "url": "redacted",
                "dtHash": "kzpx58a99d2oam082rlu588wgy1mb0zfi1e1l63f9cjx4uxc455k4t6xdiwbxian",
              },
          },
        "displayMessage": "User login to Okta",
        "eventType": "user.session.start",
        "legacyEventType": "core.user_auth.login_failed",
        "outcome": { "reason": "VERIFICATION_ERROR", "result": "FAILURE" },
        "p_any_domain_names": ["rnvtelecom.com.br"],
        "p_any_ip_addresses": ["redacted"],
        "p_event_time": "redacted",
        "p_log_type": "Okta.SystemLog",
        "p_parse_time": "redacted",
        "p_row_id": "redacted",
        "p_source_id": "redacted",
        "p_source_label": "Okta",
        "published": "redacted",
        "request":
          {
            "ipChain":
              [
                {
                  "geographicalContext":
                    {
                      "city": "Dois Irmaos",
                      "country": "Brazil",
                      "geolocation": { "lat": -29.6116, "lon": -51.0933 },
                      "postalCode": "93950",
                      "state": "Rio Grande do Sul",
                    },
                  "ip": "redacted",
                  "version": "V4",
                },
              ],
          },
        "securityContext":
          {
            "asNumber": 263297,
            "asOrg": "renovare telecom",
            "domain": "rnvtelecom.com.br",
            "isProxy": false,
            "isp": "renovare telecom",
          },
        "severity": "INFO",
        "transaction": { "detail": {}, "id": "redacted", "type": "WEB" },
        "uuid": "redacted",
        "version": "0",
      }
  - Name: Okta internal event should be ignored
    ExpectedResult: false
    Mocks:
      - objectName: get_string_set
        returnValue: >
          [
              "123456",
              "4.3.2.1",
              "user_agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36",
              "CHROME",
              "MacOS"
          ]
    Log:
      {
        "actor":
          {
            "alternateId": "admin",
            "displayName": "Bobert",
            "id": "unknown",
            "type": "User",
          },
        "authenticationContext":
          { "authenticationStep": 0, "externalSessionId": "123456789" },
        "client":
          {
            "device": "Unknown",
            "geographicalContext":
              {
                "city": "Boardman",
                "country": "United States",
                "geolocation": { "lat": 45.8234, "lon": -119.7257 },
                "postalCode": "97818",
                "state": "Oregon",
              },
            "id": "okta.b58d5b75-07d4-5f25-bf59-368a1261a405",
            "ipAddress": "44.238.82.114",
            "userAgent":
              {
                "browser": "UNKNOWN",
                "os": "Unknown",
                "rawUserAgent": "Okta-Integrations",
              },
            "zone": "null",
          },
        "debugContext":
          {
            "debugData":
              {
                "loginResult": "VERIFICATION_ERROR",
                "requestId": "redacted",
                "requestUri": "redacted",
                "threatSuspected": "false",
                "url": "redacted",
              },
          },
        "displayMessage": "User login to Okta",
        "eventType": "user.session.start",
        "legacyEventType": "core.user_auth.login_failed",
        "outcome": { "reason": "VERIFICATION_ERROR", "result": "FAILURE" },
        "p_any_domain_names": ["rnvtelecom.com.br"],
        "p_any_ip_addresses": ["redacted"],
        "p_event_time": "redacted",
        "p_log_type": "Okta.SystemLog",
        "p_parse_time": "redacted",
        "p_row_id": "redacted",
        "p_source_id": "redacted",
        "p_source_label": "Okta",
        "published": "redacted",
        "request":
          {
            "ipChain":
              [
                {
                  "geographicalContext":
                    {
                      "city": "Boardman",
                      "country": "United States",
                      "geolocation": { "lat": 45.8234, "lon": -119.7257 },
                      "postalCode": "97818",
                      "state": "Oregon",
                    },
                  "ip": "44.238.82.114",
                  "version": "V4",
                },
              ],
          },
        "securityContext": {},
        "severity": "INFO",
        "transaction": { "detail": {}, "id": "redacted", "type": "WEB" },
        "uuid": "redacted",
        "version": "0",
      }

Detection logic

Condition

client.id not in "okta.b58d5b75-07d4-5f25-bf59-368a1261a405"
not (eventType not in ["user.authentication.sso", "user.session.start"] or authenticationContext.externalSessionId eq "unknown" or debugContext.debugData.dtHash eq "unknown")

This rule also runs imperative logic the parser cannot express as a filter; the conditions above are the structured part it could extract.

Exclusions

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

Field	Kind	Excluded values
`eventType`	in	`user.authentication.sso`, `user.session.start`
`authenticationContext.externalSessionId`	eq	`unknown`
`debugContext.debugData.dtHash`	eq	`unknown`
`client.id`	eq	`okta.b58d5b75-07d4-5f25-bf59-368a1261a405`

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
`eventType`	in	`user.authentication.sso` `user.session.start`

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`
`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)