mirror of
https://github.com/splunk/security_content
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divious1
110 lines
3.8 KiB
YAML
110 lines
3.8 KiB
YAML
asset_type: Endpoint
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confidence: medium
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creation_date: '2018-08-07'
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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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- Carbon Black Response
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- CrowdStrike Falcon
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- Sysmon
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- Tanium
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- Ziften
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description: This search looks for the execution of "mshta.exe" with command-line
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arguments that launch a script. The search will return the first time and last time
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these command-line arguments were used for these executions, as well as the target
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system, the user, process "mshta.exe" and its parent process.
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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, parent_process_name
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rule_description: Mshta.exe is seen to be executing scripts via the command-line
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arguments
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rule_title: Mshta.exe is executing scripts 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: 50
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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` count values(Processes.process) as process
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values(Processes.parent_process) as parent_process min(_time) as firstTime
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max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name=mshta.exe
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by Processes.user Processes.process_name Processes.parent_process_name Processes.dest |
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`drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)`|
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search (process=*vbscript* OR process=*javascript*)'
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suppress:
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suppress_fields: dest, process, parent_process_name
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suppress_period: 86400s
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eli5: Mshta.exe is a built-in Windows utility that can launch HTML files with .hta
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extensions (HTML applications), javascript, or VBScript. The search detects this
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behavior by looking for events where the process mshta.exe is executed with command-line
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arguments that indicate that a script is invoked
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entities:
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- dest
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
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Sysmon TA.
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id: b89919ed-fe5f-492c-b139-95dqb161039e
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investigations:
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- id: fecf2918-670d-4f1c-872b-3d7317a41xf9
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name: Get Registry Activities
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type: splunk
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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: 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: Although unlikely, some legitimate applications may exhibit
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this behavior, triggering a false positive.
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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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- Exploitation
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mitre_attack:
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- Execution
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- Command-Line Interface
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- Persistence
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nist:
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- PR.PT
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- DE.CM
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modification_date: '2018-12-03'
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name: Detect mshta.exe running scripts in command-line arguments
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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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