mirror of
https://github.com/splunk/security_content
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Patrick Bareiss
35 lines
1.5 KiB
YAML
35 lines
1.5 KiB
YAML
name: Single Letter Process On Endpoint
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id: a4214f0b-e01c-41bc-8cc4-d2b71e3056b4
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version: 2
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date: '2019-04-01'
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description: This search looks for process names that consist only of a single letter.
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how_to_implement: You must be ingesting data that records process activity from your
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hosts to populate the Endpoint data model in the Processes node. You must also be
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ingesting logs with both the process name and command line from your endpoints.
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The command-line arguments are mapped to the "process" field in the Endpoint data
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model.
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type: ESCU
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references: []
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author: David Dorsey, Splunk
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes by Processes.dest, Processes.user,
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Processes.process, Processes.process_name | `drop_dm_object_name(Processes)` | `security_content_ctime(lastTime)`
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| `security_content_ctime(firstTime)` | eval process_name_length = len(process_name),
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endExe = if(substr(process_name, -4) == ".exe", 1, 0) | search process_name_length=5
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AND endExe=1 | table count, firstTime, lastTime, dest, user, process, process_name
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| `single_letter_process_on_endpoint_filter`'
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known_false_positives: Single-letter executables are not always malicious. Investigate
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this activity with your normal incident-response process.
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tags:
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analytics_story:
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- DHS Report TA18-074A
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kill_chain_phases:
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- Actions on Objectives
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cis20:
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- CIS 2
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nist:
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- ID.AM
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- PR.DS
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security_domain: endpoint
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asset_type: Endpoint
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