mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Patrick Bareiss
46 lines
2.2 KiB
YAML
46 lines
2.2 KiB
YAML
name: Suspicious Reg exe Process
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id: a6b3ab4e-dd77-4213-95fa-fc94701995e0
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version: 3
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date: '2020-03-16'
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description: This search looks for reg.exe being launched from a command prompt not
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started by the user. When a user launches cmd.exe, the parent process is usually
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explorer.exe. This search filters out those instances.
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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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- https://car.mitre.org/wiki/CAR-2013-03-001
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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 where Processes.parent_process_name
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!= explorer.exe Processes.process_name =cmd.exe by Processes.user Processes.process_name
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Processes.parent_process_name Processes.dest Processes.process_id Processes.parent_process_id
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| `drop_dm_object_name("Processes")` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| search [| tstats `security_content_summariesonly` count FROM datamodel=Endpoint.Processes
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where Processes.parent_process_name=cmd.exe Processes.process_name= reg.exe by Processes.parent_process_id
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Processes.dest Processes.process_name | `drop_dm_object_name("Processes")` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | rename parent_process_id as process_id |dedup
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process_id| table process_id dest] | `suspicious_reg_exe_process_filter` '
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known_false_positives: It's possible for system administrators to write scripts that
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exhibit this behavior. If this is the case, the search will need to be modified
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to filter them out.
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tags:
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analytics_story:
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- Windows Defense Evasion Tactics
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- Disabling Security Tools
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- DHS Report TA18-074A
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mitre_attack_id:
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- T1112
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- T1089
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kill_chain_phases:
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- Actions on Objectives
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cis20:
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- CIS 8
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nist:
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- DE.CM
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security_domain: endpoint
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asset_type: Endpoint
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