mirror of
https://github.com/splunk/security_content
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Rod Soto
54 lines
1.9 KiB
YAML
54 lines
1.9 KiB
YAML
name: Common Ransomware Notes
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id: ada0f478-84a8-4641-a3f1-d82362d6bd71
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version: 4
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date: '2020-11-09'
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author: David Dorsey, Splunk
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type: batch
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datamodel:
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- Endpoint
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description: The search looks for files created with names matching those typically
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used in ransomware notes that tell the victim how to get their data back.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime values(Filesystem.user) as user values(Filesystem.dest) as dest values(Filesystem.file_path)
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as file_path from datamodel=Endpoint.Filesystem by Filesystem.file_name | `drop_dm_object_name(Filesystem)`
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| `security_content_ctime(lastTime)` | `security_content_ctime(firstTime)` | `ransomware_notes`
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| `common_ransomware_notes_filter`'
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how_to_implement: You must be ingesting data that records file-system activity from
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your hosts to populate the Endpoint Filesystem data-model node. This is typically
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populated via endpoint detection-and-response product, such as Carbon Black, or
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via other endpoint data sources, such as Sysmon. The data used for this search is
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typically generated via logs that report file-system reads and writes.
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known_false_positives: It's possible that a legitimate file could be created with
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the same name used by ransomware note files.
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references: []
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tags:
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analytic_story:
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- SamSam Ransomware
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- Ransomware
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- Ryuk Ransomware
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- Clop Ransomware
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asset_type: Endpoint
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automated_detection_testing: passed
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cis20:
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- CIS 8
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1485/ransomware_notes/windows-sysmon.log
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kill_chain_phases:
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- Actions on Objectives
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mitre_attack_id:
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- T1485
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nist:
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- PR.PT
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- DE.CM
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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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- Filesystem.user
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- Filesystem.dest
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- Filesystem.file_path
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- Filesystem.file_name
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security_domain: endpoint
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