mirror of
https://github.com/splunk/security_content
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divious1
113 lines
4.4 KiB
YAML
113 lines
4.4 KiB
YAML
asset_type: Endpoint
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confidence: high
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creation_date: '2018-11-04'
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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 fast execution of processes used for system network
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configuration discovery on the endpoint.
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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, user
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rule_description: Fast execution of processes $related to network system configuration
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discovery seen on $dest$.
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rule_title: Fast execution of processes $process_name$ related to network
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discovery seen 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 by Processes.dest
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Processes.process_name Processes.user _time | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `drop_dm_object_name(Processes)` | search `system_network_configuration_discovery_tools`
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| transaction dest connected=false maxpause=5m |where eventcount>=5 | table firstTime lastTime
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dest user process_name process parent_process eventcount'
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suppress:
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suppress_fields: dest,user
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suppress_period: 86400s
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eli5: Attackers have a range of built-in Windows tools they leverage to ascertain
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the topography of a network from the point of view of a compromised machine. It
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is uncommon to see these commands execute quickly within short periods of time.
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This search returns the number of times, as well as the first time and last times,
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that every process has run for each endpoint. It then executes the macro `system_network_configuration_discovery_tools`,
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which looks for processes that are typically used for network configuration discovery.
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Once you have a list of suspicious process launches for each destination, you can
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leverage the transaction command to see what processes are fired within a five-minute
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span on an endpoint and detect only those events where the count of these processes
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is greater than five.
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entities:
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- dest
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how_to_implement: You must be ingesting data that records registry activity from your
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hosts to populate the Endpoint data model in the processes node. This is typically
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populated via endpoint detection-and-response products, such as Carbon Black, or
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endpoint data sources, such as Sysmon. The data used for this search is usually
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generated via logs that report reads and writes to the registry or that are populated
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via Windows event logs, after enabling process tracking in your Windows audit settings.
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id: a51bfe1a-94f0-48cc-b1e4-16ae10145893
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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: 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: It is uncommon for normal users to execute a series of commands
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used for network discovery. System administrators often use scripts to execute these
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commands. These can generate false positives.
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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 2
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kill_chain_phases:
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- Installation
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- Command and Control
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- Actions on Objectives
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mitre_attack:
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- Execution
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nist:
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- ID.AM
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- PR.DS
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modification_date: '2018-11-20'
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name: Detect processes used for System Network Configuration Discovery
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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: '1.0'
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