HTTP requests attempting SSRF to cloud metadata endpoints

Classification:

attack

Tactic:

TA0001-initial-access

Technique:

T1190-exploit-public-facing-application

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Goal

Detect HTTP requests targeting cloud instance metadata addresses or hostnames in parameters or headers, including successful responses.

Strategy

This rule monitors OCSF HTTP query strings and headers for link-local metadata IPs and provider-specific metadata hostnames, grouped by @ocsf.src_endpoint.ip.

Triage and response

  • Determine whether the application should ever reach metadata endpoints from user-controlled input.
  • If successful SSRF is likely, assess the risk of credential or token exposure from metadata responses.