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MediumElastic detection rulesElastic

OpenAI ChatGPT Enterprise Unusual MCP App Activity

Detects the first time a ChatGPT Enterprise MCP app name is used by a given user email within an organization in the rule history window. MCP apps connect ChatGPT to external systems and can move organizational data…

Description

Detects the first time a ChatGPT Enterprise MCP app name is used by a given user email within an organization in the rule history window. MCP apps connect ChatGPT to external systems and can move organizational data into third-party tools. Alerting on first-seen organization, user, and app id triples highlights new or unexpected connector usage rather than every routine approved MCP request. App name is still required in the query for investigation context.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

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Detection requirements

Platform
IaaSLinuxmacOSOffice SuiteSaaSWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
event_index

Known benign triggers

  • Approved MCP apps such as Slack or ticketing connectors generate routine traffic during normal work. First-seen alerts are common during onboarding when a user first uses an approved app.

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