mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
65 lines
3.1 KiB
YAML
65 lines
3.1 KiB
YAML
name: Detect Remote Access Software Usage File
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id: 3bf5541a-6a45-4fdc-b01d-59b899fff961
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version: 1
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date: '2024-02-22'
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author: Steven Dick
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status: production
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type: Anomaly
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description: The following analytic detects when a file from a known remote access software is written to disk within the environment. Adversaries use these utilities to retain remote access capabilities to the environment. Utilities in the lookup include AnyDesk, GoToMyPC, LogMeIn, TeamViewer and much more. Review the lookup for the entire list and add any others.
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data_source:
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- Sysmon Event ID 11
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- Sysmon Event ID 15
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search: '| tstats `security_content_summariesonly` count, min(_time) as firstTime, max(_time) as lastTime, values(Filesystem.file_path) as file_path from datamodel=Endpoint.Filesystem by Filesystem.dest, Filesystem.user, Filesystem.file_name
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `drop_dm_object_name(Filesystem)`
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| lookup remote_access_software remote_utility AS file_name OUTPUT isutility, description as signature, comment_reference as desc, category
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| search isutility = TRUE
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| `detect_remote_access_software_usage_file_filter`'
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how_to_implement: The detection is based on data that originates from Endpoint Detection and Response (EDR) agents. These agents are designed to provide security-related telemetry from the endpoints where the agent is installed. To implement this search, you must ingest logs that contain the file path, file name, and the user that created the file. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the EDR product. The logs must also be mapped to the `Filesystem` node of the `Endpoint` data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process.
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known_false_positives: Known or approved applications used by the organization or usage of built-in functions.
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references:
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- https://attack.mitre.org/techniques/T1219/
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- https://thedfirreport.com/2022/08/08/bumblebee-roasts-its-way-to-domain-admin/
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- https://thedfirreport.com/2022/11/28/emotet-strikes-again-lnk-file-leads-to-domain-wide-ransomware/
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tags:
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analytic_story:
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- Insider Threat
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- Command And Control
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- Ransomware
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asset_type: Endpoint
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confidence: 50
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impact: 50
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message: A file for known a remote access software [$file_name$] was created on $dest$ by $user$.
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mitre_attack_id:
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- T1219
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observable:
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: user
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type: User
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role:
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- Victim
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- name: file_name
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type: File Name
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role:
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- Attacker
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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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required_fields:
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- _time
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- Filesystem.dest
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- Filesystem.user
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- Filesystem.file_name
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risk_score: 25
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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/T1219/screenconnect/screenconnect_sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: XmlWinEventLog |