[adulau]

An observed DCE/RPC operation and its interface identity, including operation number, commands and bind acknowledgement information.

network-connection preserves endpoints and traffic counts but cannot represent an RPC interface UUID and operation number used in lateral movement investigations.

Existing templates considered: network-connection, network-traffic.

Use related-to references to network-connection and process objects to retain endpoints and execution context.

OCSF mapping

• dce_rpc in OCSF 1.9.0 (versioned source)
• rpc_interface in OCSF 1.9.0 (versioned source)

MISP object relation	OCSF source path
interface-uuid	dce_rpc.rpc_interface.uuid
interface-version	dce_rpc.rpc_interface.version
operation-number	dce_rpc.opnum
command	dce_rpc.command
response-command	dce_rpc.command_response
flag	dce_rpc.flags
ack-result	dce_rpc.rpc_interface.ack_result
ack-reason	dce_rpc.rpc_interface.ack_reason

Datetime relations use ISO 8601. Importers can prefer the OCSF _time_dt sibling, or convert the corresponding _time epoch milliseconds to a UTC datetime. Unreported booleans remain absent. Source codes, identifiers and strings keep their source meaning; this template is a CTI-oriented subset of the OCSF object.

All attributes default to to_ids: false. Descriptive metadata, local identifiers, counts, flags and timestamps disable correlation; typed network indicators, package URIs and hashes retain correlation where applicable. Nested entities use MISP object references. Source arrays are marked multiple only when their entries can be represented independently.

Example values

These are object-relation/value pairs for one object, with illustrative identifiers:

{
  "interface-uuid": "12345778-1234-abcd-ef00-0123456789ab",
  "operation-number": 15,
  "command": "REQUEST"
}

Validation

• ./jq_all_the_things.sh and ./validate_all.sh passed on the baseline plus all 29 proposed templates: 483 template definitions, relationship checks, 22 unit tests and unique UUID checks.
• This template passed JSON Schema validation, required-field reference checks and exact jq -S -j formatting checks against the same baseline.
• The example loaded and serialized with PyMISP 3.0.0 in strict mode.

This PR adds one version-2 template with a fresh UUID, based directly on main at a9c09f216032bc6093d09f68c743cda2dae29aac. It is part of a review of all 190 base OCSF 1.9.0 objects, compared with the 454 existing MISP templates. The review identified 29 new template proposals; existing-template extensions are recorded separately for future work. No live MISP server round-trip was performed.

Codex review updates

• Use counter for operation-number so the MISP server accepts the valid value zero while preserving whole-number semantics.
• Use counter for ack-result so the MISP server accepts the valid value zero while preserving whole-number semantics.
• Use counter for ack-reason so the MISP server accepts the valid value zero while preserving whole-number semantics.

Validation after the fixes: all 29 original examples and 20 regression examples passed with PyMISP 3.0.0 in strict mode; 69 regression checks passed against the unmodified MISP 2.5 PHP attribute validator, including zero/nonzero values, negative rejection and NetBIOS authorities. The complete repository validation suite was rerun on all 483 template definitions.

[chatgpt-codex-connector]

Codex Review Summary: ✅ Completed

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-09T16:33:04.005675Z	b7d407e	PR opened
🔒 Security Review	✅ Completed 2026-11-09T16:32:32.949003Z	b7d407e	PR opened

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