Guillaume BOURGEOIS
59 lines
4.9 KiB
YAML
59 lines
4.9 KiB
YAML
name: "CrowdStrike Falcon Alerts → OCSF"
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description: "Exhaustive map of a CrowdStrike Falcon unified alert (alerts/entities/alerts/v2, results_path = resources) to OCSF. Triggering process = actor (actor.*); detected file = subject (file.*); MITRE under attacks.*."
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field_mappings:
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title: "name"
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severity: "severity_name = 'Critical' ? 5 : (severity_name = 'High' ? 4 : (severity_name = 'Medium' ? 3 : 2))"
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description: "description"
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# results_path = resources; source_path is JSONata over ONE alert object.
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# Paths absent from a given alert are skipped at ingestion, so extra entries are safe.
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ocsf:
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# ── Endpoint / device ─────────────────────────────────────────────
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- { source_path: "device.hostname", ocsf_field: "src_endpoint.hostname" }
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- { source_path: "device.machine_domain", ocsf_field: "src_endpoint.domain" }
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- { source_path: "device.external_ip", ocsf_field: "src_endpoint.ip" }
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- { source_path: "device.local_ip", ocsf_field: "device.ip" }
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- { source_path: "device.os_version", ocsf_field: "src_endpoint.os.name" }
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- { source_path: "device.platform_name", ocsf_field: "src_endpoint.os.type" }
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- { source_path: "device.mac_address", ocsf_field: "src_endpoint.mac" }
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- { source_path: "device.device_id", ocsf_field: "device.uid" }
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- { source_path: "device.agent_version", ocsf_field: "metadata.product.version" }
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# ── Finding / analytic ────────────────────────────────────────────
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- { source_path: "composite_id", ocsf_field: "finding_info.uid" }
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- { source_path: "name", ocsf_field: "finding_info.title" }
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- { source_path: "description", ocsf_field: "finding_info.desc" }
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- { source_path: "created_timestamp", ocsf_field: "finding_info.created_time" }
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- { source_path: "updated_timestamp", ocsf_field: "finding_info.modified_time" }
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- { source_path: "type", ocsf_field: "finding_info.analytic.type" }
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- { source_path: "pattern_id", ocsf_field: "finding_info.analytic.uid" }
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- { source_path: "confidence", ocsf_field: "confidence" }
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- { source_path: "status", ocsf_field: "status" }
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- { source_path: "pattern_disposition_description", ocsf_field: "status_detail" }
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# ── MITRE ATT&CK ──────────────────────────────────────────────────
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- { source_path: "tactic", ocsf_field: "attacks.tactic.name" }
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- { source_path: "tactic_id", ocsf_field: "attacks.tactic.uid" }
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- { source_path: "technique", ocsf_field: "attacks.technique.name" }
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- { source_path: "technique_id", ocsf_field: "attacks.technique.uid" }
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# ── Triggering process — the actor ────────────────────────────────
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- { source_path: "filename", ocsf_field: "actor.process.name" }
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- { source_path: "cmdline", ocsf_field: "actor.process.cmd_line" }
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- { source_path: "process_id", ocsf_field: "actor.process.pid" }
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- { source_path: "filepath", ocsf_field: "actor.process.file.path" }
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- { source_path: "sha256", ocsf_field: "actor.process.file.hashes.sha256" }
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- { source_path: "md5", ocsf_field: "actor.process.file.hashes.md5" }
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- { source_path: "user_name", ocsf_field: "actor.user.name" }
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- { source_path: "user_id", ocsf_field: "actor.user.uid" }
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- { source_path: "logon_domain", ocsf_field: "actor.user.domain" }
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# ── Parent process ────────────────────────────────────────────────
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- { source_path: "parent_details.filename", ocsf_field: "actor.process.parent_process.name" }
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- { source_path: "parent_details.cmdline", ocsf_field: "actor.process.parent_process.cmd_line" }
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- { source_path: "parent_details.process_id", ocsf_field: "actor.process.parent_process.pid" }
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# ── Detected file — the subject ───────────────────────────────────
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- { source_path: "filename", ocsf_field: "file.name" }
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- { source_path: "filepath", ocsf_field: "file.path" }
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- { source_path: "sha256", ocsf_field: "file.hashes.sha256" }
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- { source_path: "md5", ocsf_field: "file.hashes.md5" }
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# ── IOC / observable ──────────────────────────────────────────────
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- { source_path: "ioc_value", ocsf_field: "observables.value" }
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- { source_path: "ioc_type", ocsf_field: "observables.type" }
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- { source_path: "ioc_description", ocsf_field: "observables.name" }
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