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https://github.com/splunk/security_content
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Eric
74 lines
3.7 KiB
YAML
74 lines
3.7 KiB
YAML
name: Windows Registry BootExecute Modification
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id: eabbac3a-45aa-4659-920f-6b8cff383fb8
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version: 9
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date: '2025-05-02'
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author: Michael Haag, Teoderick Contreras, Splunk
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status: production
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type: TTP
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data_source:
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- Sysmon EventID 13
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description: The following analytic detects modifications to the BootExecute registry
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key, which manages applications and services executed during system boot. It leverages
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data from the Endpoint.Registry data model, focusing on changes to the registry
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path "HKLM\\System\\CurrentControlSet\\Control\\Session Manager\\BootExecute". This
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activity is significant because unauthorized changes to this key can indicate attempts
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to achieve persistence, load malicious code, or tamper with the boot process. If
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confirmed malicious, this could allow an attacker to maintain persistence, execute
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arbitrary code at boot, or disrupt system operations.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime FROM datamodel=Endpoint.Registry WHERE Registry.registry_path="*\\System\\CurrentControlSet\\Control\\Session
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Manager\\BootExecute" by Registry.action Registry.dest Registry.process_guid Registry.process_id
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Registry.registry_hive Registry.registry_path Registry.registry_key_name Registry.registry_value_data
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Registry.registry_value_name Registry.registry_value_type Registry.status Registry.user
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Registry.vendor_product | `drop_dm_object_name(Registry)` | where isnotnull(registry_value_data)
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`| `windows_registry_bootexecute_modification_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on Windows Registry that include the name of the path and key responsible for the
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changes from your endpoints into the `Endpoint` datamodel in the `Registry` node.
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In addition, confirm the latest CIM App 4.20 or higher is installed and the latest
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TA for the endpoint product.
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known_false_positives: False positives may be present and will need to be filtered.
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references:
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- https://www.microsoft.com/en-us/security/blog/2023/04/11/guidance-for-investigating-attacks-using-cve-2022-21894-the-blacklotus-campaign/
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drilldown_searches:
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- name: View the detection results for - "$dest$"
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search: '%original_detection_search% | search dest = "$dest$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$dest$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$")
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starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
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values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
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as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
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as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: The Registry BootExecute value was modified on $dest$ and should be reviewed
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immediately.
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risk_objects:
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- field: dest
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type: system
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score: 100
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threat_objects: []
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tags:
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analytic_story:
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- Windows BootKits
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asset_type: Endpoint
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atomic_guid: []
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mitre_attack_id:
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- T1542
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- T1547.001
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1547.001/atomic_red_team/bootexecute-windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: XmlWinEventLog
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