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GCP Vertex AI High GenerateContent Volume From Single IP

Detects a single source IP making a high number of Vertex AI GenerateContent (or StreamGenerateContent) audit calls against the same model resource in the lookback window. That pattern fits model extraction,…

Description

Detects a single source IP making a high number of Vertex AI GenerateContent (or StreamGenerateContent) audit calls against the same model resource in the lookback window. That pattern fits model extraction, automated scraping, or a compromised caller burning prediction quota.

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
IaaSOffice SuiteSaaS

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

Known benign triggers

  • Approved batch evaluation clients or shared NAT egress. Raise the threshold or exclude known source IP prefixes.

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