HTTP requests containing Log4Shell JNDI injection patterns

Classification:

attack

Tactic:

TA0001-initial-access

Technique:

T1190-exploit-public-facing-application

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Goal

Detect HTTP requests containing Log4Shell-style JNDI lookup strings in the query string, path, headers, or user agent.

Strategy

This rule monitors OCSF HTTP activity for JNDI injection patterns across multiple request attributes, grouped by @ocsf.src_endpoint.ip.

Triage and response

  • Confirm whether affected systems run vulnerable Log4j versions and whether lookups could have been evaluated.
  • Apply vendor patches or mitigations for affected production assets.