mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
53 lines
2.1 KiB
YAML
53 lines
2.1 KiB
YAML
name: Detect USB device insertion
|
|
id: 104658f4-afdc-499f-9719-17a43f9826f5
|
|
version: 1
|
|
date: '2017-11-27'
|
|
author: Bhavin Patel, Splunk
|
|
status: deprecated
|
|
type: TTP
|
|
description: The search is used to detect hosts that generate Windows Event ID 4663
|
|
for successful attempts to write to or read from a removable storage and Event ID
|
|
4656 for failures, which occurs when a USB drive is plugged in. In this scenario
|
|
we are querying the Change_Analysis data model to look for Windows Event ID 4656
|
|
or 4663 where the priority of the affected host is marked as high in the ES Assets
|
|
and Identity Framework.
|
|
data_source: []
|
|
search: '| tstats `security_content_summariesonly` count earliest(_time) AS earliest
|
|
latest(_time) AS latest from datamodel=Change_Analysis where (nodename = All_Changes)
|
|
All_Changes.result="Removable Storage device" (All_Changes.result_id=4663 OR All_Changes.result_id=4656)
|
|
(All_Changes.src_priority=high) by All_Changes.dest | `drop_dm_object_name("All_Changes")`|
|
|
`security_content_ctime(earliest)`| `security_content_ctime(latest)` | `detect_usb_device_insertion_filter`'
|
|
how_to_implement: To successfully implement this search, you must ingest Windows Security
|
|
Event logs and track event code 4663 and 4656. Ensure that the field from the event
|
|
logs is being mapped to the result_id field in the Change_Analysis data model. To
|
|
minimize the alert volume, this search leverages the Assets and Identity framework
|
|
to filter out events from those assets not marked high priority in the Enterprise
|
|
Security Assets and Identity Framework.
|
|
known_false_positives: Legitimate USB activity will also be detected. Please verify
|
|
and investigate as appropriate.
|
|
references: []
|
|
tags:
|
|
analytic_story:
|
|
- Data Protection
|
|
asset_type: Endpoint
|
|
confidence: 50
|
|
impact: 50
|
|
message: tbd
|
|
observable:
|
|
- name: field
|
|
type: Unknown
|
|
role:
|
|
- Unknown
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
required_fields:
|
|
- _time
|
|
- All_Changes.result
|
|
- All_Changes.result_id
|
|
- All_Changes.src_priority
|
|
- All_Changes.dest
|
|
risk_score: 25
|
|
security_domain: endpoint
|