mirror of
https://github.com/splunk/security_content
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divious1
108 lines
3.7 KiB
YAML
108 lines
3.7 KiB
YAML
asset_type: Endpoint
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confidence: medium
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creation_date: '2017-10-03'
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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 detects the process execution and arguments required to silently
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create a shim database. The sdbinst.exe application is used to install shim database
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files (.sdb). A shim is a small library which transparently intercepts an API, changes
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the parameters passed, handles the operation itself, or redirects the operation
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elsewhere.
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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, user, process
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rule_description: The system $dest$ had a shim database installed.
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rule_title: Shim Database Installation 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: 20
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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 = sdbinst.exe Processes.process="*-p*" Processes.process="*-q*"
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by Processes.process_name Processes.parent_process_name Processes.dest Processes.user
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
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suppress:
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suppress_fields: dest,user
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suppress_period: 14400s
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eli5: This search looks for the execution of sdbinst.exe with command-line arguments
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of -q and -p. The -q option performs a silent installation with no visible window,
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status, or warning information. The -p option allows the shim database to contain
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patches. It will return the count, the first time, and the last time these command-line
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arguments were seen on each endpoint and by each user.
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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: 404620de-46d8-48b6-90cc-8a8d7b0876a3
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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: None identified
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maintainers:
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- company: Splunk
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email: davidd@splunk.com
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name: David Dorsey
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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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- Persistence
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- Application Shimming
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nist:
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- DE.CM
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modification_date: '2019-03-01'
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name: Shim Database Installation With Suspicious Parameters
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original_authors:
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- company: Splunk
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email: davidd@splunk.com
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name: David Dorsey
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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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