HTTP requests containing command injection patterns

Classification:

attack

Tactic:

TA0001-initial-access

Technique:

T1059-command-and-scripting-interpreter

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Goal

Detect HTTP requests whose query parameters contain command-injection-style patterns, including when the server returns a successful response.

Strategy

This rule monitors OCSF HTTP activity (@ocsf.class_uid:4002) for suspicious sequences in @ocsf.http_request.url.query_string, grouped by @ocsf.src_endpoint.ip, and correlates with successful HTTP status codes where applicable.

Triage and response

  • Confirm whether traffic from {{@ocsf.src_endpoint.ip}} is expected (approved scanning or internal testing).
  • Review path, user agent, and application context to see whether payloads may have been executed or only probed.
  • If the activity is unauthorized, follow your incident response process.