mirror of
https://github.com/Security-Onion-Solutions/securityonion.git
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71 lines
5.1 KiB
Plaintext
71 lines
5.1 KiB
Plaintext
{
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"description" : "strelka",
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"processors" : [
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{ "json": { "field": "message", "target_field": "message2", "ignore_failure": true } },
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{ "rename": { "field": "message2.file", "target_field": "file", "ignore_missing": true } },
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{ "rename": { "field": "message2.scan", "target_field": "scan", "ignore_missing": true } },
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{ "rename": { "field": "message2.request", "target_field": "request", "ignore_missing": true } },
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{ "rename": { "field": "scan.hash", "target_field": "hash", "ignore_missing": true } },
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{ "rename": { "field": "scan.exiftool", "target_field": "exiftool", "ignore_missing": true } },
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{ "grok": { "if": "ctx.request?.attributes?.filename != null", "field": "request.attributes.filename", "patterns": ["-%{WORD:log.id.fuid}-"], "ignore_failure": true } },
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{ "gsub": { "if": "ctx.request?.attributes?.filename != null", "field": "request.attributes.filename", "pattern": "\/nsm\/strelka\/staging", "replacement": "\/nsm\/strelka\/processed" } },
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{ "foreach":
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{
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"if": "ctx.exiftool?.keys !=null",
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"field": "exiftool.keys",
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"processor": {
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"append": {
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"field": "scan.exiftool",
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"value": "{{_ingest._value.key}}={{_ingest._value.value}}"
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}
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}
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}
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},
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{ "foreach":
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{
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"if": "ctx.exiftool?.keys !=null",
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"field": "exiftool.keys",
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"processor": {
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"set": {
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"field": "exiftool.{{_ingest._value.key}}",
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"value": "{{_ingest._value.value}}"
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}
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}
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}
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},
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{ "foreach":
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{
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"if": "ctx.scan?.yara?.meta !=null",
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"field": "scan.yara.meta",
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"processor":{
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"set": {
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"field": "rule.{{_ingest._value.identifier}}",
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"value": "{{_ingest._value.value}}"
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}
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}
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}
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},
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{ "set": { "if": "ctx.exiftool?.SourceFile != null", "field": "file.source", "value": "{{exiftool.SourceFile}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.exiftool?.FilePermissions != null", "field": "file.permissions", "value": "{{exiftool.FilePermissions}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.exiftool?.FileName != null", "field": "file.name", "value": "{{exiftool.FileName}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.exiftool?.FileModifyDate != null", "field": "file.mtime", "value": "{{exiftool.FileModifyDate}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.exiftool?.FileAccessDate != null", "field": "file.accessed", "value": "{{exiftool.FileAccessDate}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.exiftool?.FileInodeChangeDate != null", "field": "file.ctime", "value": "{{exiftool.FileInodeChangeDate}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.exiftool?.FileDirectory != null", "field": "file.directory", "value": "{{exiftool.FileDirectory}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.exiftool?.Subsystem != null", "field": "host.subsystem", "value": "{{exiftool.Subsystem}}", "ignore_failure": true }},
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{ "set": { "if": "ctx.scan?.yara?.matches != null", "field": "rule.name", "value": "{{scan.yara.matches.0}}" }},
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{ "set": { "if": "ctx.scan?.yara?.matches != null", "field": "dataset", "value": "alert", "override": true }},
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{ "rename": { "field": "file.flavors.mime", "target_field": "file.mime_type", "ignore_missing": true }},
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{ "set": { "if": "ctx.rule?.name != null && ctx.rule?.score == null", "field": "event.severity", "value": 3, "override": true } },
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{ "convert" : { "if": "ctx.rule?.score != null", "field" : "rule.score","type": "integer"}},
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{ "set": { "if": "ctx.rule?.score != null && ctx.rule?.score >= 0 && ctx.rule?.score <= 49", "field": "event.severity", "value": 1, "override": true } },
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{ "set": { "if": "ctx.rule?.score != null && ctx.rule?.score >= 50 && ctx.rule?.score <=69", "field": "event.severity", "value": 2, "override": true } },
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{ "set": { "if": "ctx.rule?.score != null && ctx.rule?.score >= 70 && ctx.rule?.score <=89", "field": "event.severity", "value": 3, "override": true } },
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{ "set": { "if": "ctx.rule?.score != null && ctx.rule?.score >= 90", "field": "event.severity", "value": 4, "override": true } },
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{ "set": { "field": "observer.name", "value": "{{agent.name}}" }},
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{ "convert" : { "field" : "scan.exiftool","type": "string", "ignore_missing":true }},
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{ "remove": { "field": ["host", "path", "message", "exiftool", "scan.yara.meta"], "ignore_missing": true } },
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{ "pipeline": { "name": "common" } }
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]
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}
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