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OpenAI ChatGPT Enterprise Repeated Assistant Refusals

Detects three or more ChatGPT Enterprise assistant messages for the same user whose text matches common policy-refusal phrases (cannot assist, cannot help, cannot fulfill, unable to assist, against my guidelines, and…

Description

Detects three or more ChatGPT Enterprise assistant messages for the same user whose text matches common policy-refusal phrases (cannot assist, cannot help, cannot fulfill, unable to assist, against my guidelines, and similar) within the lookback window. A refusal burst can indicate jailbreak probing, policy-bypass attempts, or automated unsafe prompting intended to evade model safety controls.

Detection logic

Its licence does not clear it for publishing here

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Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteWindows

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

Known benign triggers

  • Approved red-team or prompt-security evaluations that intentionally elicit refusals. Exclude those users or raise the count threshold.
  • Long helpful answers that incidentally include phrases such as "I can't help with X, but I can help with Y." Read the sampled messages before treating the alert as a hard refusal campaign.

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