OpenAI ChatGPT Enterprise Codex Access Token Created

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OpenAI ChatGPT Enterprise Codex Access Token Created

Detects ChatGPT Enterprise Codex events that create an access token. Codex access tokens enable automated CLI or environment access and can be abused for persistence or lateral automation after account compromise. Treat tokens with a missing expires_at as higher priority during triage.

Rule type: esql

Rule indices: None

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Domain: GenAI
Platform: OpenAI
Data Source: OpenAI ChatGPT Enterprise
Service: OpenAI ChatGPT Enterprise
Use Case: Threat Detection
Resources: Investigation Guide
Rule Type: ES|QL
Tactic: Persistence
Mitre Atlas: AML.T0083

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

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Triage and analysis

Investigating OpenAI ChatGPT Enterprise Codex Access Token Created

A Codex access token was created. These tokens enable automated CLI or environment access and can be abused for persistence or automation after account compromise.

Escalate when the token owner or purpose is unclear, the creator is unexpected, or tool and MCP activity follows immediately. Close as a false positive for documented CI or local development token creation.

Possible investigation steps

Identify the creator (user.email / user.id) and token-related fields on the alert.
Confirm the intended automation use and whether a ticket or runbook covers the token.
Review subsequent Codex tool calls, MCP activity, or security-scan changes from the same user or client.
Inventory other active Codex tokens for the same user.

False positive analysis

Developers create Codex tokens for CI runners and local development environments as part of normal workflows.

Response and remediation

Revoke unauthorized tokens and review subsequent Codex tool and MCP activity.
Rotate related credentials if the token may have been exposed.

Setup

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Setup

This rule requires the OpenAI ChatGPT Enterprise integration to collect compliance logs into Elasticsearch.

https://www.elastic.co/docs/reference/integrations/openai_chatgpt_enterprise

Rule query

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from logs-openai_chatgpt_enterprise.codex_log-* metadata _id, _version, _index
| where
    data_stream.dataset == "openai_chatgpt_enterprise.codex_log" and
    event.action == "access_token_created"
| keep
    _id, _version, _index, @timestamp, event.action, user.id, user.email,
    openai_chatgpt_enterprise.codex_log.client_id,
    openai_chatgpt_enterprise.codex_log.event_details.access_token_id,
    openai_chatgpt_enterprise.codex_log.event_details.access_token_name,
    openai_chatgpt_enterprise.codex_log.event_details.created_by_user_id,
    openai_chatgpt_enterprise.codex_log.event_details.expires_at,
    data_stream.*

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Account Manipulation
- ID: T1098
- Reference URL: https://attack.mitre.org/techniques/T1098/

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