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P4T12ICK
38 lines
1.5 KiB
YAML
38 lines
1.5 KiB
YAML
name: Previously Seen Cloud Compute Images - Update
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id: 6f1ca5dc-e445-401c-9845-a96d2b6ba184
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version: 1
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date: '2020-08-12'
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author: David Dorsey, Splunk
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type: Baseline
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datamodel:
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- Change
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description: This search builds a table of previously seen images used to launch cloud
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compute instances
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search: '| tstats earliest(_time) as firstTimeSeen, latest(_time) as lastTimeSeen
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from datamodel=Change where All_Changes.action=created by All_Changes.Instance_Changes.image_id
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| `drop_dm_object_name("All_Changes")` | `drop_dm_object_name("Instance_Changes")`
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| where image_id != "unknown" | inputlookup append=t previously_seen_cloud_compute_images
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| stats min(firstTimeSeen) as firstTimeSeen max(lastTimeSeen) as lastTimeSeen by
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image_id | where lastTimeSeen > relative_time(now(), `previously_seen_cloud_compute_images_forget_window`)
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| eventstats min(firstTimeSeen) as globalFirstTime | eval enough_data = if(globalFirstTime
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<= relative_time(now(), "-7d@d"), 1, 0) | outputlookup previously_seen_cloud_compute_images'
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how_to_implement: You must be ingesting the approrpiate cloud infrastructure logs
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known_false_positives: none
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references: []
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tags:
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analytic_story:
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- Cloud Cryptomining
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deployments:
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- Daily Cache Updates
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detections:
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- Cloud Compute Instance Created With Previously Unseen Image
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- All_Changes.action
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- All_Changes.Instance_Changes.image_id
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security_domain: network
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