mirror of
https://github.com/splunk/security_content
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divious1
109 lines
3.9 KiB
YAML
109 lines
3.9 KiB
YAML
asset_type: Endpoint
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confidence: medium
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creation_date: '2018-03-28'
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data_metadata:
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data_models:
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- Endpoint
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data_source:
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- Endpoint Intel
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providing_technologies:
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- Sysmon
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description: This search looks for events where `PsExec.exe` is run with the `accepteula`
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flag in the command line. PsExec is a built-in Windows utility that enables you
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to execute processes on other systems. It is fully interactive for console applications.
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This tool is widely used for launching interactive command prompts on remote systems.
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Threat actors leverage this extensively for executing code on compromised systems.
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If an attacker is running PsExec for the first time, they will be prompted to accept
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the end-user license agreement (EULA), which can be passed as the argument `accepteula`
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within the command line.
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detect:
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splunk:
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correlation_rule:
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notable:
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nes_fields: dest,process_name
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rule_description: The process pssxec.exe was run with the -accepteula flag
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on $dest$ by $user$.
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rule_title: PsExec executed with accepteula flag on $dest$.
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risk:
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risk_object: dest
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risk_object_type:
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- system
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risk_score: 75
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schedule:
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cron_schedule: 0 * * * *
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earliest_time: -70m@m
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latest_time: -10m@m
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search: '| tstats `security_content_summariesonly` values(Processes.process) as process min(_time)
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as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where
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Processes.process_name = PsExec.exe Processes.process = "*accepteula*" by
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Processes.process_name Processes.dest Processes.parent_process_name | `drop_dm_object_name(Processes)`|
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`security_content_ctime(firstTime)`| `security_content_ctime(lastTime)`'
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suppress:
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suppress_fields: dest, process_name
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suppress_period: 86400s
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eli5: In this search, we are looking for the PsExec process with `accepteula` on the
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command line.
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entities:
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- dest
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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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id: b89919ed-fe5f-492c-b139-151xb162040e
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investigations:
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- id: bc91a8cf-35e7-4bb2-8140-e756cc06fd76
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name: Get Authentication Logs For Endpoint
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type: splunk
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- id: fecf2918-670d-4f1c-872b-3d7317a41bf9
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name: Get Parent Process Info
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type: splunk
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- id: fdcfb369-1725-4c24-824a-22972d7f0d55
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name: Get Risk Modifiers For User
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type: splunk
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- id: bc91a8cf-35e7-4bb2-8140-e756cc06fd71
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name: Get Process Info
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type: splunk
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- id: 3d6c3213-5fff-4a1e-b57d-b24c262171e7
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name: Get Notable History
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type: splunk
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- id: f3fb4d1b-5f33-4b01-b541-c7af9534c242
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name: Get Notable Info
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type: splunk
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- id: fdcfb369-1725-4c24-824a-22972d7f0d65
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name: Get Risk Modifiers For Endpoint
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type: splunk
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- id: bc91a8cf-35e7-4bb2-8140-e756cc06fd74
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name: Get User Information from Identity Table
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type: splunk
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known_false_positives: Administrators can leverage PsExec for accessing remote systems
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and might pass `accepteula` as an argument if they are running this tool for the
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first time. However, it is not likely that you'd see multiple occurrences of this
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event on a machine
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maintainers:
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- company: Splunk
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email: bpatel@splunk.com
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name: Bhavin Patel
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mappings:
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cis20:
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- CIS 8
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kill_chain_phases:
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- Actions on Objectives
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mitre_attack:
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- Execution
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- Command-Line Interface
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nist:
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- PR.PT
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- DE.CM
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modification_date: '2019-02-26'
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name: Detect PsExec With accepteula Flag
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original_authors:
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- company: Splunk
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email: bpatel@splunk.com
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name: Bhavin Patel
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references: []
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security_domain: endpoint
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spec_version: 2
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type: splunk
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version: '2.0'
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